Fei Xiang
MS/PhD Student
Fei Xiang received his B.S. in Applied Chemistry from the University of Electronic Science and Technology of China (UESTC) in 2020. His graduation project is the study of carbon-based oxygen electrocatalytic materials used in fuel cells and metal-air batteries.
Fei is the recipient of many Awards (National Scholarship in 2017 & 2019, National Encouragement Scholarship, 2018, 1st Prize, The 10th Mathematics Competition of Chinese College, 2018, Outstanding Graduates of UESTC, 2020, Outstanding Undergraduate Thesis of UESTC, 2020)
Fei joined Primalight Lab in Sep. 2020. Fei’s researches focus on the design and fabrication of high-performance PEC devices for solar energy conversion and storage.
email: fei.xiang@kaust.edu.sa
location: building 1, level 4, 4200-WS33
Fei’s research projects
Fei’s publications
2021
Li, Ning; Xiang, Fei; Fratalocchi, Andrea
Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies Journal Article
In: Advanced Sustainable Systems, pp. 2000242, 2021.
Abstract | Links | BibTeX | Tags: artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting
@article{https://doi.org/10.1002/adsu.202000242d,
title = {Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies},
author = {Ning Li and Fei Xiang and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adsu.202000242},
doi = {https://doi.org/10.1002/adsu.202000242},
year = {2021},
date = {2021-01-01},
journal = {Advanced Sustainable Systems},
pages = {2000242},
abstract = {Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.},
keywords = {artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting},
pubstate = {published},
tppubtype = {article}
}
Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.
Li, Ning; Xiang, Fei; Elizarov, Maxim S.; Makarenko, Maxim; Lopez, Arturo B.; Getman, Fedor; Bonifazi, Marcella; Mazzone, Valerio; Fratalocchi, Andrea
Large-Scale and Wide-Gamut Coloration at the Diffraction Limit in Flexible, Self-Assembled Hierarchical Nanomaterials Journal Article
In: Advanced Materials, pp. 2108013, 2021.
Abstract | Links | BibTeX | Tags: dielectrics, nanostructured materials, optical nanoresonators, structural color
@article{https://doi.org/10.1002/adma.202108013c,
title = {Large-Scale and Wide-Gamut Coloration at the Diffraction Limit in Flexible, Self-Assembled Hierarchical Nanomaterials},
author = {Ning Li and Fei Xiang and Maxim S. Elizarov and Maxim Makarenko and Arturo B. Lopez and Fedor Getman and Marcella Bonifazi and Valerio Mazzone and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202108013},
doi = {https://doi.org/10.1002/adma.202108013},
year = {2021},
date = {2021-01-01},
journal = {Advanced Materials},
pages = {2108013},
abstract = {Abstract Unveiling physical phenomena that generate controllable structural coloration is at the center of significant research efforts due to the platform potential for the next generation of printing, sensing, displays, wearable optoelectronics components, and smart fabrics. Colors based on e-beam facilities possess high resolutions above 100k dots per inch (DPI), but limit manufacturing scales up to 4.37 cm2, while requiring rigid substrates that are not flexible. State-of-art scalable techniques, on the contrary, provide either narrow gamuts or small resolutions. A common issue of current methods is also a heterogeneous resolution, which typically changes with the color printed. Here, a structural coloration platform with broad gamuts exceeding the red, green, and blue (RGB) spectrum in inexpensive, thermally resistant, flexible, and metallic-free structures at constant 101 600 DPI (at the diffraction limit), obtained via mass-production manufacturing is demonstrated. This platform exploits a previously unexplored physical mechanism, which leverages the interplay between strong scattering modes and optical resonances excited in fully 3D dielectric nanostructures with suitably engineered longitudinal profiles. The colors obtained with this technology are scalable to any area, demonstrated up to the single wafer (4 in.). These results open real-world applications of inexpensive, high-resolution, large-scale structural colors with broad chromatic spectra.},
keywords = {dielectrics, nanostructured materials, optical nanoresonators, structural color},
pubstate = {published},
tppubtype = {article}
}
Abstract Unveiling physical phenomena that generate controllable structural coloration is at the center of significant research efforts due to the platform potential for the next generation of printing, sensing, displays, wearable optoelectronics components, and smart fabrics. Colors based on e-beam facilities possess high resolutions above 100k dots per inch (DPI), but limit manufacturing scales up to 4.37 cm2, while requiring rigid substrates that are not flexible. State-of-art scalable techniques, on the contrary, provide either narrow gamuts or small resolutions. A common issue of current methods is also a heterogeneous resolution, which typically changes with the color printed. Here, a structural coloration platform with broad gamuts exceeding the red, green, and blue (RGB) spectrum in inexpensive, thermally resistant, flexible, and metallic-free structures at constant 101 600 DPI (at the diffraction limit), obtained via mass-production manufacturing is demonstrated. This platform exploits a previously unexplored physical mechanism, which leverages the interplay between strong scattering modes and optical resonances excited in fully 3D dielectric nanostructures with suitably engineered longitudinal profiles. The colors obtained with this technology are scalable to any area, demonstrated up to the single wafer (4 in.). These results open real-world applications of inexpensive, high-resolution, large-scale structural colors with broad chromatic spectra.
2020
Yang, Jian; Chang, Le; Guo, Heng; Sun, Jiachen; Xu, Jingyin; Xiang, Fei; Zhang, Yanning; Wang, Zhiming; Wang, Liping; Hao, Feng; Niu, Xiaobin
Electronic structure modulation of bifunctional oxygen catalysts for rechargeable Zn–air batteries Journal Article
In: J. Mater. Chem. A, vol. 8, pp. 1229-1237, 2020.
Abstract | Links | BibTeX | Tags:
@article{C9TA11654K,
title = {Electronic structure modulation of bifunctional oxygen catalysts for rechargeable Zn–air batteries},
author = {Jian Yang and Le Chang and Heng Guo and Jiachen Sun and Jingyin Xu and Fei Xiang and Yanning Zhang and Zhiming Wang and Liping Wang and Feng Hao and Xiaobin Niu},
url = {http://dx.doi.org/10.1039/C9TA11654K},
doi = {10.1039/C9TA11654K},
year = {2020},
date = {2020-01-01},
journal = {J. Mater. Chem. A},
volume = {8},
pages = {1229-1237},
publisher = {The Royal Society of Chemistry},
abstract = {Extensive efforts have been devoted to develop bifunctional oxygen catalysts for rechargeable zinc–air batteries (ZABs) owing to the extremely high specific energy density, low cost and safety of these emerging batteries. The oxygen catalysts play roles in maximizing the energy conversion efficiencies of ZABs. Herein, a strategy of electronic structure modulation is used by ruthenium doping and post-oxidation treatment in cobalt encapsulated N-doped carbon nanotubes for enhancing catalytic activities of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). First principles calculations reveal that doping Ru into Co or CoOx enhances charge transfer from Ru to carbon atoms adjacent to the doped N atom and then promotes the reversible oxygen reactions. The achieved catalysts (denoted as RuCoOx@Co/N-CNT) exhibit efficient catalytic activities driving both ORR and OER with a small overpotential gap (EOER − EORR = 0.79 V). Specifically, the ZABs assembled with RuCoOx@Co/N-CNT catalysts display an open-circuit potential of 1.44 V, a specific capacity of 788 mA h g−1, a power density of 93 mW cm−2 and long-term discharge–charge cycling stability, even superior to those of commercial Pt/C and RuO2 electrodes. This work proves that modulating the electronic structure of active sites by doping or post oxidation treatment is an efficient way to improve the catalytic performance.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Extensive efforts have been devoted to develop bifunctional oxygen catalysts for rechargeable zinc–air batteries (ZABs) owing to the extremely high specific energy density, low cost and safety of these emerging batteries. The oxygen catalysts play roles in maximizing the energy conversion efficiencies of ZABs. Herein, a strategy of electronic structure modulation is used by ruthenium doping and post-oxidation treatment in cobalt encapsulated N-doped carbon nanotubes for enhancing catalytic activities of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). First principles calculations reveal that doping Ru into Co or CoOx enhances charge transfer from Ru to carbon atoms adjacent to the doped N atom and then promotes the reversible oxygen reactions. The achieved catalysts (denoted as RuCoOx@Co/N-CNT) exhibit efficient catalytic activities driving both ORR and OER with a small overpotential gap (EOER − EORR = 0.79 V). Specifically, the ZABs assembled with RuCoOx@Co/N-CNT catalysts display an open-circuit potential of 1.44 V, a specific capacity of 788 mA h g−1, a power density of 93 mW cm−2 and long-term discharge–charge cycling stability, even superior to those of commercial Pt/C and RuO2 electrodes. This work proves that modulating the electronic structure of active sites by doping or post oxidation treatment is an efficient way to improve the catalytic performance.
Yang, Jian; Xiang, Fei; Guo, Heng; Wang, Liping; Niu, Xiaobin
Honeycomb-like porous carbon with N and S dual-doping as metal-free catalyst for the oxygen reduction reaction Journal Article
In: Carbon, vol. 156, pp. 514-522, 2020, ISSN: 0008-6223.
Abstract | Links | BibTeX | Tags: Heteroatom doping, High performance polymers, Metal free carbon catalyst, Oxygen reduction reaction
@article{YANG2020514,
title = {Honeycomb-like porous carbon with N and S dual-doping as metal-free catalyst for the oxygen reduction reaction},
author = {Jian Yang and Fei Xiang and Heng Guo and Liping Wang and Xiaobin Niu},
url = {https://www.sciencedirect.com/science/article/pii/S0008622319310012},
doi = {https://doi.org/10.1016/j.carbon.2019.09.087},
issn = {0008-6223},
year = {2020},
date = {2020-01-01},
journal = {Carbon},
volume = {156},
pages = {514-522},
abstract = {It has been a major challenge to dispose the unrenewable high-performance polymers (HPPs) after their large-scale application in our society. Here we report an approach to reuse one kind of HPP as carbon and sulfur sources in synthesizing nitrogen and sulfur dual-doped honeycomb-like porous carbon catalysts for oxygen reduction reaction. Briefly, poly(phenylene sulfide sulfone) with S atoms in polymer chain as sulfur source, dicyandiamide as nitrogen source and SiO2 nanoparticles as hard-template are pyrolyzed in designed temperatures under argon atmosphere. Then N, S dual-doped carbon catalysts (N, S@C) are obtained after subjected etching treatment. By adjusting moderate amount of SiO2, the optimized catalyst (denoted as N, S@CM-1000) pyrolyzed at 1000 °C, shows best ORR electrocatalytic activity in alkaline environment. Impressively, when N, S@CM-1000 is used as a cathode catalyst, the corresponding assembled zinc-air batteries exhibit a maximum power density of 90 mW cm−2 with long-term durability and high rate capacity. Therefore, this work provides a feasible way to resolve and reuse the unrenewable HPP for synthesizing heteroatom doped carbon-based catalysts.},
keywords = {Heteroatom doping, High performance polymers, Metal free carbon catalyst, Oxygen reduction reaction},
pubstate = {published},
tppubtype = {article}
}
It has been a major challenge to dispose the unrenewable high-performance polymers (HPPs) after their large-scale application in our society. Here we report an approach to reuse one kind of HPP as carbon and sulfur sources in synthesizing nitrogen and sulfur dual-doped honeycomb-like porous carbon catalysts for oxygen reduction reaction. Briefly, poly(phenylene sulfide sulfone) with S atoms in polymer chain as sulfur source, dicyandiamide as nitrogen source and SiO2 nanoparticles as hard-template are pyrolyzed in designed temperatures under argon atmosphere. Then N, S dual-doped carbon catalysts (N, S@C) are obtained after subjected etching treatment. By adjusting moderate amount of SiO2, the optimized catalyst (denoted as N, S@CM-1000) pyrolyzed at 1000 °C, shows best ORR electrocatalytic activity in alkaline environment. Impressively, when N, S@CM-1000 is used as a cathode catalyst, the corresponding assembled zinc-air batteries exhibit a maximum power density of 90 mW cm−2 with long-term durability and high rate capacity. Therefore, this work provides a feasible way to resolve and reuse the unrenewable HPP for synthesizing heteroatom doped carbon-based catalysts.
0000
Li, Ning; Xiang, Fei; Fratalocchi, Andrea
Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies Journal Article
In: Advanced Sustainable Systems, vol. n/a, no. n/a, pp. 2000242, 0000.
Abstract | Links | BibTeX | Tags: artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting
@article{https://doi.org/10.1002/adsu.202000242,
title = {Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies},
author = {Ning Li and Fei Xiang and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adsu.202000242},
doi = {https://doi.org/10.1002/adsu.202000242},
journal = {Advanced Sustainable Systems},
volume = {n/a},
number = {n/a},
pages = {2000242},
abstract = {Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.},
keywords = {artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting},
pubstate = {published},
tppubtype = {article}
}
Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.
Li, Ning; Xiang, Fei; Fratalocchi, Andrea
Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies Journal Article
In: Advanced Sustainable Systems, vol. n/a, pp. 2000242, 0000.
Abstract | Links | BibTeX | Tags: artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting
@article{https://doi.org/10.1002/adsu.202000242b,
title = {Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies},
author = {Ning Li and Fei Xiang and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adsu.202000242},
doi = {https://doi.org/10.1002/adsu.202000242},
journal = {Advanced Sustainable Systems},
volume = {n/a},
pages = {2000242},
abstract = {Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.},
keywords = {artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting},
pubstate = {published},
tppubtype = {article}
}
Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.
Li, Ning; Xiang, Fei; Fratalocchi, Andrea
Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies Journal Article
In: Advanced Sustainable Systems, pp. 2000242, 0000.
Abstract | Links | BibTeX | Tags: artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting
@article{https://doi.org/10.1002/adsu.202000242c,
title = {Silicon-Based Photocatalysis for Green Chemical Fuels and Carbon Negative Technologies},
author = {Ning Li and Fei Xiang and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adsu.202000242},
doi = {https://doi.org/10.1002/adsu.202000242},
journal = {Advanced Sustainable Systems},
pages = {2000242},
abstract = {Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.},
keywords = {artificial photosynthesis, CO2 reduction, photo-catalysis, Si, solar energy, water splitting},
pubstate = {published},
tppubtype = {article}
}
Abstract Silicon, an earth-abundant material with mature technology, low-cost manufacturing, and high stability, holds promise to enable the sustainable exploitation of solar energy resources currently under utilized at the world-scale. Apart from traditional interest in the photovoltaic industry, recent years have seen increasingly large activity in the study of Si-based photo-electro-chemical (PEC) cells for water splitting and CO2 reduction. This research established an exciting area with the potential to address the present environmental crisis originating from unregulated CO2 emission levels. In this review, the recent work on Si-based PEC devices for large scale production of hydrogen via water splitting, and carbon-negative technologies for the solar-driven reduction of CO2 into chemical fuels of industrial interest are summarized. Bias-assisted and bias-free PEC architectures are discussed, highlighting the motivations, challenges, functional mechanisms, and commenting on the perspectives related to this field of research both as a science and engineering.
Li, Ning; Xiang, Fei; Elizarov, Maxim S.; Makarenko, Maxim; Lopez, Arturo B.; Getman, Fedor; Bonifazi, Marcella; Mazzone, Valerio; Fratalocchi, Andrea
Large-Scale and Wide-Gamut Coloration at the Diffraction Limit in Flexible, Self-Assembled Hierarchical Nanomaterials Journal Article
In: Advanced Materials, vol. n/a, no. n/a, pp. 2108013, 0000.
Abstract | Links | BibTeX | Tags: dielectrics, nanostructured materials, optical nanoresonators, structural color
@article{https://doi.org/10.1002/adma.202108013b,
title = {Large-Scale and Wide-Gamut Coloration at the Diffraction Limit in Flexible, Self-Assembled Hierarchical Nanomaterials},
author = {Ning Li and Fei Xiang and Maxim S. Elizarov and Maxim Makarenko and Arturo B. Lopez and Fedor Getman and Marcella Bonifazi and Valerio Mazzone and Andrea Fratalocchi},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202108013},
doi = {https://doi.org/10.1002/adma.202108013},
journal = {Advanced Materials},
volume = {n/a},
number = {n/a},
pages = {2108013},
abstract = {Abstract Unveiling physical phenomena that generate controllable structural coloration is at the center of significant research efforts due to the platform potential for the next generation of printing, sensing, displays, wearable optoelectronics components, and smart fabrics. Colors based on e-beam facilities possess high resolutions above 100k dots per inch (DPI), but limit manufacturing scales up to 4.37 cm2, while requiring rigid substrates that are not flexible. State-of-art scalable techniques, on the contrary, provide either narrow gamuts or small resolutions. A common issue of current methods is also a heterogeneous resolution, which typically changes with the color printed. Here, a structural coloration platform with broad gamuts exceeding the red, green, and blue (RGB) spectrum in inexpensive, thermally resistant, flexible, and metallic-free structures at constant 101 600 DPI (at the diffraction limit), obtained via mass-production manufacturing is demonstrated. This platform exploits a previously unexplored physical mechanism, which leverages the interplay between strong scattering modes and optical resonances excited in fully 3D dielectric nanostructures with suitably engineered longitudinal profiles. The colors obtained with this technology are scalable to any area, demonstrated up to the single wafer (4 in.). These results open real-world applications of inexpensive, high-resolution, large-scale structural colors with broad chromatic spectra.},
keywords = {dielectrics, nanostructured materials, optical nanoresonators, structural color},
pubstate = {published},
tppubtype = {article}
}
Abstract Unveiling physical phenomena that generate controllable structural coloration is at the center of significant research efforts due to the platform potential for the next generation of printing, sensing, displays, wearable optoelectronics components, and smart fabrics. Colors based on e-beam facilities possess high resolutions above 100k dots per inch (DPI), but limit manufacturing scales up to 4.37 cm2, while requiring rigid substrates that are not flexible. State-of-art scalable techniques, on the contrary, provide either narrow gamuts or small resolutions. A common issue of current methods is also a heterogeneous resolution, which typically changes with the color printed. Here, a structural coloration platform with broad gamuts exceeding the red, green, and blue (RGB) spectrum in inexpensive, thermally resistant, flexible, and metallic-free structures at constant 101 600 DPI (at the diffraction limit), obtained via mass-production manufacturing is demonstrated. This platform exploits a previously unexplored physical mechanism, which leverages the interplay between strong scattering modes and optical resonances excited in fully 3D dielectric nanostructures with suitably engineered longitudinal profiles. The colors obtained with this technology are scalable to any area, demonstrated up to the single wafer (4 in.). These results open real-world applications of inexpensive, high-resolution, large-scale structural colors with broad chromatic spectra.