Article
Multidisciplinary Sciences
Ramy El-Bashar, Mohamed Hussein, Salem F. Hegazy, Yehia Badr, B. M. A. Rahman, Kenneth T. Grattan, Mohamed Farhat O. Hameed, Salah S. A. Obayya
Summary: The electrical characteristics of quad-crescent-shaped silicon nanowire solar cells were analyzed numerically to optimize performance, resulting in increased optical absorption and power conversion efficiency. The core-shell junction design showed an improvement of approximately 80% in conversion efficiency due to the high back surface field layer, with minimal impact from nanowire surface recombination compared to the axial junction.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Lijing Wei, Feng Li, Shaoyuan Pang, Yinglong Wang, Jianxin Guo, Jianhui Chen
Summary: In this study, a simple, vacuum-free method was used to fabricate a polymer, Nafion, for passivating the outer-shell defects of Si nanowires (SiNWs). The results showed that the Nafion molecule could firmly adsorb on the surfaces of SiNWs, leading to a high stability of the Nafion-passivated SiNWs in a chemical environment. Additionally, the Nafion-passivated SiNWs exhibited a larger absorption coefficient and an equivalent quantum confinement effect compared to the H-passivated SiNWs.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Huiqin Zhou, Anlin Feng, Shanshan Ji, Yidong Hu, Qingyang Li
Summary: A ZnO nanowire array was synthesized within 10 minutes for the first time through electrodeposition of a Zn nanocrystal coating followed by a microwave hydrothermal treatment, offering the cheapest and fastest route from aqueous solutions so far. This simple, economical, efficient, flexible, and scalable method has promising prospects for industrial applications.
CHEMICAL COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Huaizhi Li, Daniel Teal, Zexi Liang, Hyunah Kwon, David Huo, Alison Jin, Peer Fischer, Donglei Emma Fan
Summary: A versatile electrokinetic trap allows for simultaneous control of the two-dimensional position and three-dimensional angle of an untethered nanowire with high precision. This trap overcomes the challenges of Brownian motion and enables nanorobotic tools for assembly, micromanipulation, and biological measurements.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sung Yul Lim, Daye Seo, Min Seok Jang, Taek Dong Chung
Summary: Low-cost catalysts with high activity and durability are essential for efficient large-scale energy conversion in photoelectrochemical cell (PEC) systems. The spatial control of catalysts on photoelectrodes is crucial for efficient utilization of photogenerated charge carriers. Spatial decoupling of light-absorbing and catalytic components in hierarchically structured Si-based photocathodes enhances photoelectrochemical hydrogen evolution reaction (HER) performance.
Article
Materials Science, Multidisciplinary
Wenqing Liang, Lintao Wang, Ying Li, Fei Zhang, Xu Chen, Di Wu, Yongtao Tian, Xinjian Li, Chongxin Shan, Zhifeng Shi
Summary: A strategy of decorating Cs3Cu2I5 nanocrystals on Si nanowire arrays to form a hybrid structure was proposed to enhance the UV photodetection ability. The hybrid detector exhibited high photoresponsivity, specific detectivity, large on/off ratio, and outstanding operational stability.
MATERIALS TODAY PHYSICS
(2021)
Article
Optics
Yu Huang, Dong Li, Yu Liu, Minghao Hu, Weiqiang Yang, Kang Wang, Wenfeng Xiang
Summary: The optical properties of aligned nickel nanowire arrays with different degrees of oxidation were studied for terahertz polarizer applications using THz time-domain spectroscopy. It was found that increasing oxidation levels broadened the transmitted peaks in the frequency-domain spectra and caused a blue shift in peak positions, while also enhancing peak intensity. The transmittance of the arrays increased with annealing temperature, but the degree of polarization and extinction ratio decreased. The study also revealed a correlation between the degree of oxidation and the change in extinction ratio.
Article
Chemistry, Multidisciplinary
Jongwoo Kim, Jeong Seop Lee, Ji-woong Kim, Peter De Wolf, Seunghyun Moon, Dong Hwan Kim, Joo-Hyun Song, Jungwoo Kim, Taewan Kim, Sang Hwan Nam, Yung Doug Suh, Kyoung-Ho Kim, Hyunwoo Kim, ChaeHo Shin
Summary: NTIL technology enables precise control of the size and shape of plasmonic nanostructures by adjusting the indentation force and shape of AFM tips, thereby regulating their localized surface plasmon resonance and polarization-dependent plasmon modes.
Article
Engineering, Electrical & Electronic
Ge Cheng, Huawei Chen
Summary: The paper establishes a theoretical relationship and proposes an analytical solution to address the issue of calibrating weighting coefficients in existing WLS beampattern synthesis methods, further demonstrating the effectiveness of the proposed solution.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Chemistry, Physical
Mohammed Abdelhameed, Mostafa F. Abdelbar, Mohamed Esmat, Wipakorn Jevasuwan, Naoki Fukata
Summary: This study investigates the hole-injection characteristics of dopant-free vanadium oxide (VOx) semiconductor thin films. The crystal structure of solution-processable VOx films changes with different annealing atmospheres. The VOx films show effective hole-injection properties due to their high work function, wide band gap, and presence of oxygen deficiencies. The vacuum-annealed VO2-x (B) film exhibits the best hole-injection ability. The use of VOx films as hole-injection layers has significant implications for the development of low-cost and durable electronics and optoelectronics devices.
Article
Nanoscience & Nanotechnology
Xin Zhang, Hui Yang, Yunyan Zhang, Huiyun Liu
Summary: This study systematically analyzes the challenges in achieving vertically-standing nanowire lasers and proposes a nanowire superlattice distributed Bragg reflector to greatly enhance the performance of the lasers.
Article
Nanoscience & Nanotechnology
Robin Wanka, Florian Koschitzki, Vuk Puzovic, Thorben Pahl, Emily Manderfeld, Kelli Z. Hunsucker, Geoffrey W. Swain, Axel Rosenhahn
Summary: A new dendritic PG-HEMA material was synthesized chemically and compared with commercially available hydrophilic monomers, showing that PPGMA exhibited better resistance to silt incorporation and outperformed PEGMA and PG(4)MA in the DSFE assay.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Wangqiang Shen, Zepeng Yang, Junjie Wang, Jiewu Cui, Zhiyong Bao, Dongbo Yu, Minna Guo, Guangqing Xu, Jun Lv
Summary: This study reports the fabrication of core-shell structured SiNW photoelectrodes loaded with non-noble metal Bi and Sn co-catalysts for CO2 reduction to formate. The results show that Bi-Sn/SiNW photocathodes exhibit higher formate yield and selectivity compared to electrodes modified with only Bi or Sn. Experimental analysis and computational results demonstrate that the reasonable band structure formed by Si and the two co-catalysts Bi and Sn improve the migration of photogenerated electrons, thus promoting the efficient and selective CO2 reduction reaction to formate. This work lays the foundation for composite photocathodes with multiple co-catalysts for synergistic catalysis, addressing the challenges related to CO2 reduction and sustainable energy development.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Thermodynamics
Hailang Kuang, Bohao Wu, Jingye Wang, Jingguo Fu, Chunrong Yu, Jifeng Zhang, Yulong Ji
Summary: In this study, composite thermal interface materials (TIMs) with a thickness of 53 μm were prepared by forming a galvanic cell between gallium-based liquid metal and vertically aligned copper nanowire arrays to improve wettability. The contact angle of gallium-based liquid metal on the surface of vertically aligned copper nanowire arrays was improved to 10.1±0.9 degrees in HCl/CuSO4 solution. The total thermal contact resistance of the composite TIMs was as low as 3.20±0.24 mm2K/W, which reduced by 86.30% compared with commercial thermal grease.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Qian Liu, Lisi Xie, Jie Liang, Yuchun Ren, Yuanyuan Wang, Longcheng Zhang, Luchao Yue, Tingshuai Li, Yongsong Luo, Na Li, Bo Tang, Yang Liu, Shuyan Gao, Abdulmohsen Ali Alshehri, Imran Shakir, Philips O. Agboola, Qingquan Kong, Qingyuan Wang, Dongwei Ma, Xuping Sun
Summary: NiCo2O4 nanowire array on carbon cloth (NiCo2O4/CC) is proposed as a highly active electrocatalyst for ambient nitrate (NO3-) reduction to ammonia (NH3). It achieves a high Faradic efficiency of 99.0% and a large NH3 yield up to 973.2 mu mol h(-1) cm(-2). The superior catalytic activity comes from its half-metal feature and optimized adsorption energy due to the existence of Ni in the crystal structure.