Article
Chemistry, Multidisciplinary
Wenqi Zhang, Peidong Chao, Donglei Chen, Zhan Yang, Lixin Dong
Summary: A hybrid core-shell structured nanowire is proposed for a long-term stable electron source based on an isolated platinum/multi-walled carbon nanotube (Pt/MWCNT). The hybrid nanowire is prepared by growing a Pt shell on a metallic MWCNT through a field-emission-induced deposition (FEID) method. It demonstrates good stability and tolerance to poor working conditions, with a lifetime hundreds of times longer than that of the pristine bare MWCNT.
Article
Chemistry, Physical
H. Aruni Fonseka, Yunyan Zhang, James A. Gott, Richard Beanland, Huiyun Liu, Ana M. Sanchez
Summary: Three segregation bands are formed in GaAsP nanowires, with two additional P rich bands on either side of the primary band near three of the alternating radii. The primary band is attributed to inclined nanofacets near the vertices, while the formation of secondary bands requires higher phosphorus content and increased diffusivity difference between arsenic and phosphorus.
Article
Multidisciplinary Sciences
Janusz Sadowski, Anna Kaleta, Serhii Kryvyi, Dorota Janaszko, Boguslawa Kurowska, Marta Bilska, Tomasz Wojciechowski, Jaroslaw Z. Domagala, Ana M. Sanchez, Slawomir Kret
Summary: The incorporation of Bi into GaAs-(Ga,Al)As-Ga(As,Bi) core-shell nanowires grown by molecular beam epitaxy is studied. Bi-doped shells are smooth at low Bi fluxes, while higher Bi fluxes lead to Bi droplet segregation on the nanowire sidewalls, acting as catalysts for the growth of branches.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Spencer McDermott, Ryan B. Lewis
Summary: Freestanding semiconductor nanowires have enabled new possibilities for semiconductor devices, allowing for geometries, material combinations, and strain states that were previously impossible. By studying the evolution of nanowires during asymmetric shell deposition, researchers have uncovered the underlying mechanisms of the bending process, guiding future experiments and paving the way for the manufacture of bent nanowire devices.
ACS APPLIED NANO MATERIALS
(2021)
Article
Multidisciplinary Sciences
Sara Marti-Sanchez, Marc Botifoll, Eitan Oksenberg, Christian Koch, Carla Borja, Maria Chiara Spadaro, Valerio Di Giulio, Quentin Ramasse, F. Javier Garcia de Abajo, Ernesto Joselevich, Jordi Arbiol
Summary: The curvature and morphology of the core affect the growth of the shell and induce electronic band modulations in ZnSe@ZnTe nanowires. The relaxation mechanisms of strain during epitaxial growth play a crucial role in determining the morphologies, crystal structures, and properties of core-shell nanostructures. The core morphology influences the formation of the shell involving plane bending and the creation of low-angle polar boundaries.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jizhuang He, Jiahua Li, Yunfei He, Yin Ren, Sisi Li, Shulin Xing, Rongli Gao, Wei Cai, Chunlin Fu
Summary: A transmission layer/ferroelectric layer/transmission layer shell-core nanowire array was constructed to improve the photoelectric conversion efficiency of bismuth ferrite (BFO). The device showed a photoelectric conversion efficiency of 0.93%, which is significantly higher than previous reports on BFO-based photovoltaic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
C. Himwas, V Yordsri, C. Thanachayanont, M. Tchernycheva, S. Panyakeow, S. Kanjanachuchai
Summary: We report on the growth, structural, and optical properties of GaAs/GaAsPBi core-shell nanowires synthesized by MBE. The structures show advantageous optical properties for infrared applications. The GaAs/GaAsPBi core-shell nanowires exhibit high internal quantum efficiency at room temperature and have a unique structural symmetry.
Article
Chemistry, Multidisciplinary
Sandip Aryal, Durga Paudyal, Ranjit Pati
Summary: Incorporating features of antiferromagnet into a semiconductor core-shell nanowire opens up new possibilities in spintronics. Quantum mechanical prediction shows that Cr-doped nanowire behaves as an antiferromagnetic semiconductor with longer spin coherence length and high ON/OFF current ratio switching feature. This material presents potential for applications in spin-dependent quantum transport.
Article
Chemistry, Multidisciplinary
Bastian Haehnle, Philipp A. Schuster, Lisa Chen, Alexander J. C. Kuehne
Summary: A synthetic toolbox has been developed to create monodisperse core-shell and core-shell-shell particles composed entirely of different types of conjugated polymers. Seeded and fed-batch dispersion polymerizations based on Suzuki-Miyaura-type cross-coupling allow precise control over the interface between conjugated polymer phases, facilitating control over energy transfer phenomena. This new approach offers synthetic freedom for fine-tuning the optical properties of CPP, potentially enabling the synthesis of individual white light-emitting particles.
Article
Optics
Majid Zamani, Zoheir Kordrostami, Samaneh Hamedi
Summary: In this study, an efficient nanowire array was designed to enhance light trapping in nanostructured photovoltaic devices. The proposed solar cell with inclined core-shell nanowires showed improved absorption, short circuit current, and efficiency compared to other structures. Optimization of core-shell material, inclination angle, and core diameter led to significantly increased current density, demonstrating the potential for improved performance in various nanowire-based solar cell designs.
Article
Chemistry, Multidisciplinary
Sung-Un Kim, Yong-Ho Ra
Summary: The study successfully developed high-concentration InGaN and long-InGaN nanowire heterostructures on silicon substrate using molecular beam epitaxy (MBE) system, improving crystal quality and significantly enhancing optical properties.
Article
Chemistry, Physical
Seyed Mohammad Mostafavi Kashani, Vladimir G. Dubrovskii, Tilo Baumbach, Ullrich Pietsch
Summary: The growth of self-catalyzed GaAs nanowires on patterned Si substrates was monitored using micro X-ray diffraction, revealing two growth stages: axial growth and radial growth. This study provides insights into the fundamental growth mechanisms of nanowires and demonstrates the feasibility of in situ growth experiments using synchrotron radiation for future electronics and optoelectronics integration with silicon platforms.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xingchen Pan, Hao Hong, Rongli Deng, Mingrui Luo, Richard Notzel
Summary: We studied the desorption of In during the growth of InGaN nanowires on Si, which resulted in a unique light emitter. As the growth temperature increased, uniform In-rich InGaN nanowires evolved into intermediate core-shell structures before transforming into pure GaN nanowires. Various characterization techniques were used to study the different InGaN nanowire structures. A growth model was developed to understand the growth regimes influenced by anisotropic In surface diffusion and desorption. The self-formed core-shell InGaN nanowires were identified as the active region of the red light-emitting diode.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Physics, Multidisciplinary
Ersin Kantar, Mehmet Ertas
Summary: In this study, the thermal and hysteresis behaviors of triangular nanowire with core/shell structure were investigated in a mixed spins-(3/2, 5/2) Ising model with a crystal-field interaction. Different compensation behaviors and multiple hysteresis loops were found depending on the values of parameters.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Chemistry, Multidisciplinary
Yanqing Hu, Shijie Yu, Xinyi Deng, Jiaqiang Zhou, Rui Zhang, Qiyue Shao
Summary: This research discovers the opposite temperature-dependence of upconversion luminescence (UCL) in active-shell and inert-shell nanocrystals. The UCL of active-shell nanocrystals is enhanced at elevated temperature, while the UCL of inert-shell nanocrystals declines. This phenomenon is mainly attributed to the gradually attenuated surface quenching effect induced by H2O molecules.
Article
Nanoscience & Nanotechnology
Jihua Zou, Yixuan Huang, Wenhao Wang, Caihong Li, Shunyong Wei, Hezhuang Liu, Lingzhi Luo, Wen Du, Kai Shen, Aobo Ren, Jiang Wu
Summary: Improvement in the photoresponse of 2D MoS2 photodetectors was achieved by integrating MXene nanoparticles. The hybrid plasmonic structure allowed for the concentration of light waves on MoS2 nanosheets, resulting in enhanced detectivity and quantum efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Wen Du, Caihong Li, Yixuan Huang, Jihua Zou, Lingzhi Luo, Caihong Teng, Hao-Chung Kuo, Jiang Wu, Zhiming Wang
Summary: The implementation of 5G increases the demand for data processing, requiring efficient neuromorphic visual systems. This study proposes an optoelectronic reservoir computing system for sensors, which effectively processes temporal information with low training cost strategy.
IEEE ELECTRON DEVICE LETTERS
(2022)
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
Materials Science, Multidisciplinary
Caihong Li, Wen Du, Hezhuang Liu, Mao Yang, Hao Xu, Jiang Wu, Zhiming Wang
Summary: Artificial photonic synapses have sparked a new trend in mimicking neural activities, with a focus on investigating learning and memory behaviors using pressure or emotion. A hippocampus-inspired device based on MoS2 for illumination time encoding demonstrates pressure-induced memory behaviors and proposes a mechanism for the memory effect under light exposure. This research highlights the potential application of MoS2 devices in artificial neural networks.
SCIENCE CHINA-MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Feiyun Zhao, Aobo Ren, Peihang Li, Yan Li, Jiang Wu, Zhiming M. Wang
Summary: This review discusses the challenges and opportunities in improving the performance and stability of continuous-wave (CW) pumped perovskite lasers. Potential strategies from material to device levels are examined, and future prospects are proposed.
Article
Engineering, Electrical & Electronic
Taojie Zhou, Mingchu Tang, Haochuan Li, Zhan Zhang, Yuzhou Cui, Jae-Seong Park, Markel Martin, Thierry Baron, Siming Chen, Huiyun Liu, Zhaoyu Zhang
Summary: In this work, we report the fabrication of 1.3μm InAs/GaAs quantum-dot photonic-crystal nanobeam lasers directly grown on Si substrates. These lasers exhibit ultra-low energy consumption and small modal volume, making them a promising candidate for on-chip light sources in Si photonic integrated circuits.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Jihua Zou, Yizhen Ke, Xiangyu Zhou, Yixuan Huang, Wen Du, Lin Lin, Shunyong Wei, Lingzhi Luo, Hezhuang Liu, Chuanlin Li, Kai Shen, Aobo Ren, Jiang Wu
Summary: A facile van der Waals (vdWs) structured p-n heterojunction has been demonstrated by simply transferring 2D materials, showing broadband spectral response and diode-like behavior. The photodetector based on this heterojunction exhibits high performance and low power consumption in an underwater optical communication system.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Wen Du, Caihong Li, Yuxuan Hu, Yisen Yao, Yixuan Huang, Jihua Zou, Hao Xu, Jiang Wu, Zhiming Wang
Summary: This paper introduces a heterosynapse-inspired photodetector for intelligent edge visual system to process spatiotemporal information, and demonstrates that the visual system based on this design is able to conduct spatiotemporal pattern recognition and motion direction recognition tasks.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Optics
Haoyun Niu, Peng Yu, Yisong Zhu, Zhimin Jing, Peihang Li, Baoqing Wang, Cuiping Ma, Jiaying Wang, Jiang Wu, Alexander O. Govorov, Arup Neogi, Zhiming M. Wang
Summary: An on-chip acetone gas sensor based on the principle of Mach-Zehnder interferometer is proposed and demonstrated in this article. The sensor utilizes a composite film on the sensing arm to detect acetone gas, showing good selectivity and high sensitivity under room temperature operation.
Article
Materials Science, Multidisciplinary
Yixuan Huang, Xiangyu Zhou, Lingzhi Luo, Jihua Zou, Hezhuang Liu, Xiao Li, Aobo Ren, Kai Shen, Jiang Wu
Summary: This study utilizes an effective oxygen plasma treatment to fabricate multilayer MoSe2 photodetectors, which exhibit excellent photoresponse and environmental stability.
ADVANCED OPTICAL MATERIALS
(2022)
Editorial Material
Optics
Junjie Yang, Mingchu Tang, Siming Chen, Huiyun Liu
Summary: The realization of on-chip light sources enables the complete integration of Si-based photonic integrated circuits (PICs).
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xingchao Zhang, Yunkun Yang, Hongxi Zhou, Xianchao Liu, Rui Pan, He Yu, Jun Gou, Zhiming Wu, Jiang Wu, Faxian Xiu, Yi Shi, Jun Wang
Summary: This study developed an ultra-low-noise-level PD linear array based on a 3D Dirac semimetal (Cd1-xZnx)(3)As-2/Sb2Se3 heterojunction. The PD exhibited outstanding photodetection capacity from the visible to mid-infrared region, with high SNR, peak specific detectivity, and response speed. It also demonstrated long-term stability and uniformity, showing great potential for advanced optoelectronic applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Daqian Guo, Jian Huang, Mourad Benamara, Yuriy I. Mazur, Zhuo Deng, Gregory J. Salamo, Huiyun Liu, Baile Chen, Jiang Wu
Summary: We successfully integrated submonolayer quantum dot quantum cascade detectors (SML QD QCDs) on Si substrates via direct growth, reducing the threading dislocation density to a record level. High-quality InGaAs/GaAs SML QDs were observed on silicon for the first time. The as-grown SML QD QCDs on Si exhibited a normal incident photoresponse temperature up to 160 K, indicating their potential for scalable and affordable photodetectors and infrared focal plane arrays.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2023)
Article
Physics, Applied
F. T. Albeladi, S. Gillgrass, J. Nabialek, P. Mishra, R. Forrest, T. R. Albiladi, C. P. Allford, H. Deng, M. Tang, H-y Liu, S. Shutts, P. M. Smowton
Summary: InAs quantum dot ridge waveguide lasers with single-port multi-mode-interference-reflectors (MMIR) and single-cleaved reflectors were designed, fabricated, and characterized for optoelectronic-integrated-circuits. Simulations showed high fundamental mode reflectivity (> 80%) and good selectivity against higher order modes. The deep-etched MMIR lasers with 0.5 mm long cavities had a lower threshold current of 24 mA compared to standard Fabry-Perot cleaved-cleaved FP-RWG lasers of the same length at 25 degrees C, and 56 mA compared to 102 mA at 55 degrees C. The MMIR lasers exhibited stable ground state operation up to 50 degrees C and showed potential as small footprint sources for integrated photonics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Jingwen Ma, Taojie Zhou, Mingchu Tang, Haochuan Li, Zhan Zhang, Xiang Xi, Mickael Martin, Thierry Baron, Huiyun Liu, Zhaoyu Zhang, Siming Chen, Xiankai Sun
Summary: This study successfully realizes topological Dirac-vortex microcavity lasers on a silicon substrate and observes room-temperature continuous-wave linearly polarized vertical laser emission. These lasers exhibit topological robustness, maintaining a stable wavelength despite variations in the cavity size, and their free spectral range does not follow the universal inverse scaling law with the cavity size.
LIGHT-SCIENCE & APPLICATIONS
(2023)