Article
Chemistry, Multidisciplinary
Yonatan Sivan, Yonatan Dubi
Summary: This study provides a comprehensive quantitative theory for light emission from Drude metals under continuous wave illumination, revealing a dependence of the electronic contribution to emission on the emission frequency similar to the energy dependence of the non-equilibrium distribution of electrons. The research shows that the emission does not originate from Fermion statistics or strictly follow boson statistics, and presents an analytic description of the dependence of metal emission on electric field, pump laser frequency, and electron temperature.
Article
Materials Science, Multidisciplinary
Shenyou Zhao, Yanting Yin, Jun Peng, Yiliang Wu, Gunther G. Andersson, Fiona J. Beck
Summary: PEH photodiodes based on metal nanoparticles have low performance due to low collection efficiency of hot electrons. The deposition temperature of ALD-TiO2 in Au-TiO2-based PEH photodiodes is correlated with the measured external quantum efficiency (EQE). Modulating the material properties of TiO2 can lead to an improvement in EQE by changing the energy levels in the semiconductor, indicating that lowering the Schottky barrier height increases hot electron collection efficiency.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Miguel Martinez-Calderon, Baptiste Groussin, Victoria Bjelland, Eric Chevallay, Valentin N. Fedosseev, Marcel Himmerlich, Pierre Lorenz, Alejandro Manjavacas, Bruce A. Marsh, Holger Neupert, Ralf E. Rossel, Walter Wuensch, Eduardo Granados
Summary: This research proposes the use of direct-laser nanostructuring techniques on copper substrates to improve the efficiency and robustness of electron photoinjectors. By exciting localized surface plasmons, hot electrons are generated, leading to a significant increase in quantum efficiency. When combined with semiconductor thin-films, the efficiency is further enhanced.
Article
Chemistry, Multidisciplinary
Hailu Wang, Fang Wang, Tengfei Xu, Hui Xia, Runzhang Xie, Xiaohao Zhou, Xun Ge, Weiwei Liu, Yicheng Zhu, Liaoxin Sun, Jiaxiang Guo, Jiafu Ye, Muhammad Zubair, Man Luo, Chenhui Yu, Deyan Sun, Tianxin Li, Qiandong Zhuang, Lan Fu, Weida Hu, Wei Lu
Summary: The proposed method offers a feasible route to store and efficiently collect hot electrons by intentionally mixing different phases in III-V semiconductor nanowires, generating additional energy levels to capture and store hot electrons, while core/shell nanowires demonstrate superiority in extracting hot electrons.
Article
Chemistry, Multidisciplinary
Lucas Besteiro, Artur Movsesyan, Oscar Avalos-Ovando, Seunghoon Lee, Emiliano Cortes, Miguel A. Correa-Duarte, Zhiming M. Wang, Alexander O. Govorov
Summary: This study explores the possibility of growing chiral plasmonic nanocrystals from nonchiral seeds using circularly polarized light, and introduces a novel theoretical methodology to simulate realistic photogrowth processes. The results demonstrate strongly anisotropic and chiral growth of nanocrystals, even for those with subwavelength sizes.
Article
Nanoscience & Nanotechnology
Larousse Khosravi Khorashad, Christos Argyropoulos
Summary: This study systematically investigates the temperature dynamics of hot electrons in ultrathin gaps, and quantifies and analyzes them using the two-temperature model and nonlocal model approach. The temperature dependent material properties derived from the study are used to examine the ultrafast transient nonlinear modification in the absorption spectrum of tunable nanophotonic absorbers, as well as the damage threshold under pulsed laser illuminations.
Article
Chemistry, Multidisciplinary
Sergio Kogikoski Jr, Anushree Dutta, Ilko Bald
Summary: By utilizing DNA to transfer hot electrons generated by silver nanoparticles over distance, driving chemical reactions in molecules nonadsorbed on the surface, insights into the mechanisms of advanced plasmonic catalysts can be gained. This study demonstrates the potential of DNA-mediated transfer for applications in catalysis and nanomedicine.
Article
Chemistry, Multidisciplinary
Sergio Kogikoski Jr, Anushree Dutta, Ilko Bald
Summary: The study demonstrates that DNA can assist in the transfer of hot electrons generated by silver nanoparticles over several nanometers to drive chemical reactions in nonadsorbed molecules. Additionally, the introduction of 8-bromo-adenosine in double-stranded DNA oligonucleotides proved the DNA-mediated transfer mechanism.
Article
Nanoscience & Nanotechnology
Brock Doiron, Yi Li, Ryan Bower, Andrei Mihai, Stefano Dal Forno, Sarah Fearn, Ludwig Huttenhofer, Emiliano Cortes, Lesley F. Cohen, Neil M. Alford, Johannes Lischner, Peter Petrov, Stefan A. Maier, Rupert F. Oulton
Summary: Understanding metal-semiconductor interfaces is crucial for photocatalysis and sub-bandgap solar energy harvesting. In this work, we compared the electron extraction efficiency at Au/TiO2 and TiON/TiO2-x interfaces. We found a bottleneck in electron relaxation in the TiON system, and demonstrated that oxygen can enhance electron harvesting and prolong electron lifetimes at the metal-semiconductor interface.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zehao Song, Masiar Sistani, Fabian Schwingshandl, Alois Lugstein
Summary: This study presents a multifunctional Al-Si-Al heterostructure device with tunable Schottky barriers. It controls plasmon-induced hot carrier injection at a metal-semiconductor interface. The device achieves light absorption, surface plasmon generation, and separation of hot carriers through the decay of surface plasmons. The investigations aim to develop CMOS-compatible plasmonic photovoltaics with versatile implementations for autonomous nanosystems.
Article
Materials Science, Multidisciplinary
Xiewen Wen, Weipeng Wang, Xiang Zhang, Hailong Chen, Shuai Jia, Yongji Gong, Weibing Chen, Yanfeng Wang, Hanyu Zhu, Junrong Zheng, P. M. Ajayan, Jun Lou
Summary: By systematically investigating the interfacial interaction kinetics among different plasmonic metals and TMDs, a pathway for hot-carrier injection is elucidated. The pathway highlights the exciton formation timescale as a threshold for interfacial carrier injection, with injected hot carriers interacting with excitons to form charged quasiparticles known as trions, which have extended lifetimes.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Kyle R. Dorman, Vincent R. Whiteside, David K. Ferry, Israa G. Yusuf, Tanner J. Legvold, Tetsuya D. Mishima, Michael B. Santos, Stephen J. Polly, Seth M. Hubbard, Ian R. Sellers
Summary: InGaAs heterostructures have the potential to reduce thermalization losses in solar cells by maintaining high energy hot carrier behavior. The challenges of real space transfer between upper valleys of different materials are the main barriers to extraction.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Artur Movsesyan, Alina Muravitskaya, Lucas V. Besteiro, Eva Yazmin Santiago, Oscar Avalos-Ovando, Miguel A. Correa-Duarte, Zhiming Wang, Gil Markovich, Alexander O. Govorov
Summary: This study demonstrates the possibility of inducing chiral shapes in nanocrystals in a diluted solution using circularly polarized light (CPL). The chiral patterns are created by the electromagnetic retardation effect, with the formation of chiral hot-spot patterns on anisotropic nanocrystals with sharp edges and tips. 2D chirality is more easily induced than 3D chirality, and imprinting 3D chirality on spherical nanocrystals is not possible. Linearly polarized light (LPL) can create chiral nanocrystals on a substrate. This study provides the principles for using CPL and LPL illuminations to create chiral nanostructures.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Wenhao Wang, Lucas Besteiro, Peng Yu, Feng Lin, Alexander O. Govorov, Hongxing Xu, Zhiming Wang
Summary: We propose a novel Ag grating/TiO2 cladding hybrid structure for hot electron photodetection (HEPD), which combines quasi-bound states in the continuum (BIC) and plasmonic hot electrons to achieve perfect absorption and multiband HEPD. By combining quasi-BIC and guided resonance, our structure enables more efficient light harvesting compared to traditional gold plasmonics.
Article
Nanoscience & Nanotechnology
Yoel Negrin-Montecelo, Adbelrhaman Hamdeldein Ahmed Geneidy, Alexander O. Govorov, Ramon A. Alvarez-Puebla, Lucas V. Besteiro, Miguel A. Correa-Duarte
Summary: Photocatalysis is a promising alternative energy technology that converts solar energy into chemical products. This study explores the use of plasmonic materials to sensitize traditional semiconductor photocatalysts. Using CdS quantum dots as a bridging system, energy from Au nanostructures is transferred to TiO2 nanoparticles, resulting in significantly accelerated reactions. The study highlights the importance of the morphology of the Au nanoparticles in their photosensitizing capabilities.
Article
Chemistry, Physical
Chaohua He, Delong Duan, Jingxiang Low, Yu Bai, Yawen Jiang, Xinyu Wang, Shuangming Chen, Ran Long, Li Song, Yujie Xiong
Summary: Cu-based electrocatalysts with surface reconstruction play a crucial role in CO2 conversion into multicarbon hydrocarbons. Polycrystalline Cu nanoparticles with high-index facets derived from Cu2-xS showed excellent CO2 conversion performance. In situ X-ray absorption spectroscopy and OH- adsorption characterizations were used to study the changes in electrocatalytic performance during the two stages of desulphurization and surface reconstruction.
Article
Chemistry, Physical
Guangyu Liu, Feng Gao, Hongwei Zhang, Lei Wang, Chao Gao, Yujie Xiong
Summary: The synergistic combination of biological whole-cell bacteria with man-made semiconductor materials offers a new approach for sustainable solar-driven CO2 fixation. This study presents an inorganic-biological hybrid system composed of Thiobacillus thioparus bacteria and CdS nanoparticles, which can efficiently fix CO2 using cost-effective inorganic salts and without the need for anaerobic conditions.
Article
Chemistry, Multidisciplinary
Kun Chen, Wei Zhang, Yu Bai, Wanbing Gong, Ning Zhang, Ran Long, Yujie Xiong
Summary: This study demonstrates a more thermodynamically and kinetically favorable electrochemical oxidative dehydrogenation (EODH) reaction to replace the conventional anodic oxygen evolution reaction (OER) in electricity-driven water splitting. By using cobalt cyclotetraphosphate (Co2P4O12) nanorods catalyst grown on nickel foam, the anodic reaction lowers the electricity input by 317 mV to achieve a desired current density of 100 mA/cm2, with a highly selective benzonitrile product of over 97%. Furthermore, when coupled with cathodic hydrogen evolution reaction (HER), this configuration exhibits an energy-saving up to 17% relative to conventional water splitting, with near unit selectivity towards cathodic H2 and anodic benzonitrile products.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jun Zhang, Xiaofeng Cui, Yu Zhou, Tingting Kong, Yixin Wang, Xianwen Wei, Yujie Xiong
Summary: In this study, Au-25 nanoclusters were encapsulated in a Cu-3(BTC)(2) metal-organic framework (Au-25@Cu-BTC), which enables CO2 photoreduction for selective CO production in low-concentration CO2 atmospheres (even down to 0.1%) with significantly improved durability for at least 48 hours.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Huijun Zhao, Yujie Xiong, Aijun Du, Wanbing Gong, Xin Mao, Jifang Zhang, Haimin Zhang, Yue Lin
Summary: A facile reductive pyrolysis approach was used to synthesize NiCo alloy nanoparticles supported on N-doped carbon nanotubes (N-CNTs) for electrocatalytic reactions. These NiCo@N-CNTs demonstrated excellent stability, selectivity, and efficiency in the production of precious azoxybenzene compounds. This research has great significance in various industries.
Article
Engineering, Environmental
Qianqian Zhou, Peidong Hong, Xu Shi, Yulian Li, Ke Yao, Wanqi Zhang, Chengming Wang, Junyong He, Kaisheng Zhang, Lingtao Kong
Summary: In this study, a novel Cu2O/Cu@MXene composite with a nanoconfinement structure was designed to effectively activate peroxymonosulfate (PMS) for the degradation of tetracycline (TC). Results showed that the MXene could fix the Cu2O/Cu nanoparticles and suppress their agglomeration, leading to a removal efficiency of 99.14% for TC within 30 minutes. The outstanding catalytic performance was attributed to the promotion of TC adsorption and electron transmission by the MXene. Furthermore, the degradation efficiency of TC remained over 82% after five cycles, and two specific degradation pathways were proposed based on the LC-MS analysis. This study provides valuable insights for suppressing the agglomeration of nanoparticles and expands the application of MXene materials in environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Linlin Chen, Canyu Hu, Yueyue Dong, Yaping Li, Qianqi Shi, Guangyu Liu, Ran Long, Yujie Xiong
Summary: Reasonable design and controllable fabrication are crucial for achieving high sensitivity and uniformity in surface-enhanced Raman spectroscopy (SERS) detection. The coupling of localized surface plasmon resonance (LSPR) mode and surface plasmon polariton (SPP) mode has shown great potential in generating excellent SERS responses. However, the nonuniformity of nanostructures obtained by traditional wet chemical methods hinders further improvement of LSPR-SPP coupling efficiency. In this study, a controllable electron-beam lithography (EBL) process was utilized to fabricate layered Au nanochips, resulting in improved SERS performance and high uniformity over a large area.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Jun Ma, Can Zhu, Keke Mao, Wenbin Jiang, Jingxiang Low, Delong Duan, Huanxin Ju, Dong Liu, Kun Wang, Yijing Zang, Shuangming Chen, Hui Zhang, Zeming Qi, Ran Long, Zhi Liu, Li Song, Yujie Xiong
Summary: A sustainable and efficient photocatalytic methane halogenation method using alkali halides as halogenation agents over Cu-doped TiO2 nanostructures is developed. This method achieves a production rate of up to 0.61mmol/h/m2 for chloromethane or 1.08mmol/h/m2 for bromomethane, with a stability of 28 hours. The produced methyl halides can be further transformed into methanol and pharmaceutical intermediates.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jun Ma, Jing Yu, Guangyu Chen, Yu Bai, Shengkun Liu, Yangguang Hu, Mohammad Al-Mamun, Yu Wang, Wanbing Gong, Dong Liu, Yafei Li, Ran Long, Huijun Zhao, Yujie Xiong
Summary: This study reports the synthesis of N-doped carbon-coated Co nanoparticles as a photothermal catalyst for CO2 hydrogenation. The catalyst exhibits remarkable activity and stability under full spectrum light illumination, providing a simple and efficient route for the preparation of highly active and durable nonprecious metal catalysts for promising photothermal catalytic reactions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiangyu Wang, Zhiwei Jiang, Peng Wang, Zheng Chen, Tian Sheng, Zhengcui Wu, Yujie Xiong
Summary: This study presents a solution to the challenge of large current density in CO2 electroreduction (CO2ER) for ethanol production by introducing Ag+-doped InSe nanosheets with Se vacancies. The doping of Ag+ enables the formation of key reaction intermediates and their evolution into ethanol, while stabilizing the In2+ species. The optimal catalyst exhibits high ethanol Faradaic efficiency and partial current density in an MEA electrolyzer, paving the way for large-scale production of ethanol with high selectivity and energy efficiency.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Zhen He, Qiaohui Duan, Lingwen Liao, Chengming Wang
Summary: Jagged Au-Pt bimetallic nanowires with abundant twin boundaries have been synthesized, and the lattice strain and electronic structures of Pt in the twin-rich nanowires have been tuned, resulting in the modulation of alcohol oxidation reaction (AOR) activities. The AuPt3 nanowires exhibit the highest mass activity for ethanol and methanol oxidation reactions, surpassing other nanowires and commercial Pt/C catalysts. The structure-activity correlation for AOR follows a volcano-shaped curve with increasing Pt ratios. This work provides a simple yet effective method to synthesize twin-rich bimetallic nanostructures with controlled lattice strain and illustrates their structure-dependent properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Rong Li, Yu Huang, Xianjin Shi, Liqin Wang, Zhiyu Li, Dandan Zhu, Xiaoliang Liang, Junji Cao, Yujie Xiong
Summary: This study reports on the rational doping of a two-dimensional Co3O4 catalyst using an agitation-assisted molten salt method, which forms two different structures of active sites and enhances the catalytic oxidation of toluene in specific temperature intervals, enabling the catalyst to work efficiently over a wide temperature range.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zhen He, Qiaohui Duan, Chengming Wang, Lingwen Liao
Summary: Penta-twinned Pd nanowires with abundant high-energy atomic steps have been synthesized and they exhibit superior catalytic activity for ethanol and ethylene glycol oxidation reactions. These stepped Pd nanowires show enhanced catalytic performance and stability compared to commercial Pd/C. The mass activities of stepped Pd nanowires for EOR and EGOR are 6.38 and 7.98 A mg(Pd)(-1), respectively, which are 3.1 and 2.6 times higher than Pd nanowires enclosed by (100) facets.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Nannan Zhu, Xingyue Zhang, Nannan Chen, Jiahui Zhu, Xinyue Zheng, Zheng Chen, Tian Sheng, Zhengcui Wu, Yujie Xiong
Summary: This study presents the design of a catalyst that integrates MnO2 nanosheets with Pd nanoparticles to achieve the conversion of CO2ER to methanol with high selectivity and activity at a large current density. The catalyst modifies the electronic structure and provides additional active sites, promoting the formation of key reaction intermediates and their successive evolution into methanol. This work opens a new avenue for controlling C-1 intermediates for CO2ER to methanol in an MEA electrolyzer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Xin Mao, Wanbing Gong, Yang Fu, Jiayi Li, Xinyu Wang, Anthony P. O'Mullane, Yujie Xiong, Aijun Du
Summary: This study demonstrates the importance of optimal Cu-Cu distance in catalytic activity for CO2 conversion and presents a successful synthesis of a COOH-decorated MIL-53(Cu) catalyst with high performance for C-2 production.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
