Article
Chemistry, Multidisciplinary
Camille Barbier, Ludovic Largeau, Noelle Gogneau, Laurent Travers, Christophe David, Ali Madouri, Dyhia Tamsaout, Jean-Christophe Girard, Guillemin Rodary, Hervei Montigaud, Christophe Durand, Maria Tchernycheva, Frank Glas, Jean-Christophe Harmand
Summary: This study investigates the nucleation of GaN nanostructures on graphene as growth substrates for semiconductors. By using plasma-assisted molecular beam epitaxy, the incubation time before the epitaxy of the first GaN islands is explored. It is found that graphene is modified after nitrogen plasma exposure, and C-N bonds are identified. The adhesion between graphene and GaN nanostructures is found to be strong due to the incorporation of pyridinic N atoms in the lattice. This work demonstrates the modification of a graphene monolayer before nucleation and growth of GaN nanowires becomes possible.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Mario F. Zscherp, Nils Mengel, Detlev M. Hofmann, Vitalii Lider, Badrosadat Ojaghi Dogahe, Celina Becker, Andreas Beyer, Kerstin Volz, Joerg Schoermann, Sangam Chatterjee
Summary: This study successfully optimized the quality of c-GaN epitaxial layers by introducing pre-growth treatments and buffer layers, achieving nearly perfect crystallinity and smooth surfaces and interfaces. The optimized growth parameters resulted in extremely small surface roughness and very limited stacking fault densities in phase pure c-GaN layers. The high structural quality of the epitaxial layers was further confirmed through photoluminescence spectroscopy.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Paulina Ciechanowicz, Sandeep Gorantla, Monika Welna, Agnieszka Pieni, Jaroslaw Serafinczuk, Bogdan Kowalski, Robert Kudrawiec, Detlef Hommel
Summary: Self-induced dodecagonal GaN microrods can be grown by molecular beam epitaxy in Ga-rich conditions due to the antisurfactant properties of arsenic atoms. The investigation of temperature's role in the growth of GaN microrods reveals an optimal growth temperature window of 760-800 degrees C. Lowering the temperature increases the population of irregular and amorphous microrods, while increasing the temperature disrupts the growth of GaN microrods. The incorporation of As in GaN microrods is negligible, as confirmed by X-ray diffraction and transmission electron microscopy.
Article
Chemistry, Multidisciplinary
Denis Petrovich Borisenko, Alexander Sergeevich Gusev, Nikolay Ivanovich Kargin, Petr Leonidovich Dobrokhotov, Alexey Afanasievich Timofeev, Vladimir Arkhipovich Labunov, Mikhail Mikhailovich Mikhalik, Konstantin Petrovich Katin, Mikhail Mikhailovich Maslov, Pavel Sergeevich Dzhumaev, Ivan Vladimirovich Komissarov
Summary: In this study, SLG/FLG and MLG samples were obtained using the CVD method, and plasma-assisted molecular beam epitaxy was used for GaN graphene-assisted growth. The effect of graphene defectiveness and thickness on the quality of the GaN epilayers was investigated. The results showed that bilayer graphene provided optimal conditions for the growth of GaN/AlN.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
Junjie Yang, Zizhuo Liu, Pamela Jurczak, Mingchu Tang, Keshuang Li, Shujie Pan, Ana Sanchez, Richard Beanland, Jin-Chuan Zhang, Huan Wang, Fengqi Liu, Zhibo Li, Samuel Shutts, Peter Smowton, Siming Chen, Alwyn Seeds, Huiyun Liu
Summary: This paper investigates the replacement of a thin Ge buffer layer for part of the GaAs buffer layer in a III-V quantum-dot laser grown on Si, resulting in improved laser performance. By using this approach, a very high operating temperature of 130 degrees Celsius has been demonstrated for the InAs/GaAs QD laser.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Babak Nikoobakht, Aaron C. Johnston-Peck, David Laleyan, Ping Wang, Zetian Mi
Summary: A novel approach was presented for growth of surface-directed spinel ZnGa2O4 and beta-Ga2O3 nanofins coated with a non-polar GaN shell, utilizing a vacancy-assisted mechanism for exchange between Zn and Ga. The predictability over surface registries and tunable porosity of the core/shell fins is anticipated to be significant for various applications.
Article
Physics, Applied
Ping Wang, Ding Wang, Shubham Mondal, Zetian Mi
Summary: In this study, robust ferroelectricity was demonstrated in single-crystalline thin films. The crystallographic alignment was confirmed using x-ray diffraction measurements. The highly uniform coercive field and remnant polarization were observed in the nearly lattice-matched heterostructure. The reliability of the ferroelectricity was systematically characterized and showed negligible degradation after a large number of switching cycles. This research provides a feasible pathway for fully epitaxial integration of ferroelectricity into nitride heterostructures, with important applications in various fields.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Pawel Wyborski, Pawel Podemski, Piotr Andrzej Wronski, Fauzia Jabeen, Sven Hoefling, Grzegorz Sek
Summary: This study presents the optical characterization of GaAs-based InAs quantum dots (QDs) and reveals that the height of the QDs dominates the energies of optical transitions. The study also observes the polarization anisotropy of QD emission and determines the carrier activation energies and main channels of carrier loss through photoreflectance measurements. Furthermore, the study confirms the zero-dimensional nature of the emission through photoluminescence measurements of single QDs.
Article
Chemistry, Physical
Henryk Turski, Pawel Wolny, Mikolaj Chlipala, Marta Sawicka, Anna Reszka, Pawel Kempisty, Leszek Konczewicz, Grzegorz Muziol, Marcin Siekacz, Czeslaw Skierbiszewski
Summary: Atomically thin metal adlayers are used as surfactants in semiconductor crystal growth, with the role of the adlayer in dopant incorporation in GaN being unexplored. Experimental study shows that the presence of atomically thin gallium or indium layers dramatically affects Ge incorporation in GaN, with indium surfactant layer promoting Ge incorporation while gallium surfactant layer promotes segregation of Ge to the surface. Understanding the role of surfactants is crucial for controlling GaN doping and achieving high n-type doping levels using Ge.
Article
Physics, Multidisciplinary
Antian Du, Chunfang Cao, Shixian Han, Hailong Wang, Qian Gong
Summary: This paper reports the realization of high performance 1.31µm InAs/GaAs quantum dot lasers on a Si substrate with all-MBE. Under continuous wave operation mode, Si-based InAs quantum dot lasers with a narrow ridge structure achieved a low threshold current density of 375 A cm(-2), high output power of 63 mW, and high operating temperature of 80°C. It has great potential for application in the development of Si-based photonic integration circuits.
Article
Materials Science, Coatings & Films
Iwan Susanto, Chi-Yu Tsai, Yen-Teng Ho, Ping-Yu Tsai, Ing-Song Yu
Summary: This study investigates the growth of GaN films on layered 2D-MoS2/c-sapphire substrate using a plasma-assisted molecular beam epitaxy system. The pre-nitridation process and growth duration are found to enhance the optical properties and crystal quality of the GaN films. The study also demonstrates a potential solution for the future applications of GaN-based devices.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ning Wang, Peng Wang, Fengzhi Wang, Haiping He, Jinyun Huang, Xinhua Pan, Guangming Zhu, Jiangbo Wang, Zhizhen Ye
Summary: This study investigates the growth of ZnO film on a graphene-buffered sapphire substrate using plasma-assisted molecular beam epitaxy (PAMBE). The results show that the crystal quality of ZnO film can be improved by buffering it with double-layer graphene (DLG), leading to the formation of symmetric pits on the film surface. The findings have implications for the development of simplified growth technology for ZnO-based films and devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Irene Manglano Clavero, Christoph Margenfeld, Jana Hartmann, Andreas Waag
Summary: This study investigates the influence of temperature and ammonia partial pressure on the morphology of GaN shell grown on GaN microfin cores. It is shown that growth above 1000 degrees C is determined by the competition between growth and decomposition, leading to material redistribution between different surfaces. Decomposition processes are found to strongly influence the vertical-to-lateral distribution of material during GaN growth on 3D structures. The findings emphasize the importance of understanding thermal decomposition processes and material redistribution for controlling and optimizing growth on these architectures.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Jiadong Yu, Zhibiao Hao, Jun Deng, Xiang Li, Lai Wang, Yi Luo, Jian Wang, Changzheng Sun, Yanjun Han, Bing Xiong, Hongtao Li
Summary: This study investigates the growth conditions and material properties of III-nitride films using plasma-assisted molecular beam epitaxy and AlN buffer layer, achieving low-temperature van der Waals epitaxy. The optimized crystalline quality and surface flatness of AlN buffer layer are beneficial for subsequent GaN film growth.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Mantu K. Hudait, Michael Meeker, Jheng-Sin Liu, Michael B. Clavel, Shuvodip Bhattacharya, Giti A. Khodaparast
Summary: This study investigated the structural and optical properties of buffer mediated epitaxial germanium (Ge) layer and compared it with bulk Ge substrates. The results showed that the epitaxial Ge layer grown via molecular beam epitaxy (MBE) has similar quality to bulk Ge substrates, making it suitable for Ge-based photonic devices.
Article
Crystallography
H. H. Yeh, M. C. Wen, L. Chang, K. H. Ploog, M. M. C. Chou
JOURNAL OF CRYSTAL GROWTH
(2019)
Article
Multidisciplinary Sciences
Pai-Chun Wei, Cheng-Xun Cai, Cheng-Rong Hsing, Ching-Ming Wei, Shih-Hsun Yu, Hsin-Jay Wu, Cheng-Lung Chen, Da-Hua Wei, Duc-Long Nguyen, Mitch M. C. Chou, Yang-Yuan Chen
SCIENTIFIC REPORTS
(2019)
Article
Chemistry, Multidisciplinary
Ting-Hsun Lan, Chin-Yun Pan, Pao-Hsin Liu, Mitch M. C. Chou
APPLIED SCIENCES-BASEL
(2019)
Article
Crystallography
ChengDa Tsai, Ikai Lo, YingChieh Wang, ChenChi Yang, HongYi Yang, HueiJyun Shih, HuiChun Huang, Mitch M. C. Chou, Louie Huang, Binson Tseng
Article
Optics
Tao Yan, L. Trinkler, V Korsaks, C-Y J. Lu, B. Berzina, L. Chang, M. M. C. Chou, K. H. Ploog
Article
Chemistry, Multidisciplinary
Da-Ren Hang, Ya-Qi Pan, Krishna Hari Sharma, Mitch M. C. Chou, Sk Emdadul Islam, Hui-Fen Wu, Chi-Te Liang
Article
Crystallography
Hong-Yi Yang, Ikai Lo, Cheng-Da Tsai, Ying-Chieh Wang, Huei-Jyun Shih, Hui-Chun Huang, Mitch M. C. Chou, Louie Huang, Terence Wang, Ching T. C. Kuo
Article
Chemistry, Multidisciplinary
Yi-Fen Tsai, Pai-Chun Wei, Liuwen Chang, Kuang-Kuo Wang, Chun-Chuen Yang, Yen-Chung Lai, Cheng-Rong Hsing, Ching-Ming Wei, Jian He, G. Jeffrey Snyder, Hsin-Jay Wu
Summary: The phase transition induced by Sb doping in GeTe can generate favorable spontaneous composition fluctuations and enhance the zT value of thermoelectric materials. This method can suppress thermal conductivity, maintain an appropriate carrier concentration range, and create high-performance thermoelectric materials.
ADVANCED MATERIALS
(2021)
Article
Electrochemistry
Dajin Dai, Wan-Tung Yao, Tao Yan, Liuwen Chang
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Chemistry, Analytical
Shiu-Ming Huang, Jai-Lung Hung, Mitch Chou, Chi-Yang Chen, Fang-Chen Liu, Ruei-San Chen
Summary: Broadband photosensors have been widely studied in various materials, with recent research focusing on finding a wavelength-insensitive photosensor. Photocurrent measurements in Sb2Te3 flakes show insensitivity to a wide range of wavelengths, with the observed photocurrent primarily originating from band structure peak transitions. This indicates that bulk state band structure is the main source of the observed photocurrent, challenging the common explanation that the carrier mainly comes from surface states in low-dimensional materials.
Article
Materials Science, Multidisciplinary
Chieh-Ning Yen, Liu-Wen Chang, Chen-An Hsu, Jer-Ren Yang, Horng-Yi Chang, Shing-Hoa Wang, Hsueh-Ren Chen
Summary: Arrayed nano-precipitated TiC in a ferrite matrix was obtained through thermal treatment in this study. The arrayed interphase nano precipitates remained unaffected by fatigue deformation and the arrayed arrangement was disrupted only at low cycle numbers. The interphase nano-precipitated steel was strengthened through a bowing mechanism, increasing the microhardness of ferrite.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Yin-Pai Lin, Sergei Piskunov, Laima Trinkler, Mitch Ming-Chi Chou, Liuwen Chang
Summary: The structural, electronic and optical properties of stressed MgO-ZnO nanocomposite alloys with varying concentrations were studied using ab initio simulations. Different crystal structures and concentrations affect the properties of the alloys.
Article
Nanoscience & Nanotechnology
Shiu-Ming Huang, Chien Lin, Sheng-Yu You, Pin-Cyuan Chen, Jai-Long Hong, Jyun-Fong Wong, You-Jhih Yan, Shih-Hsun Yu, Mitch M. C. Chou
NANOSCALE RESEARCH LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Shih-Hsun Yu, Tsu Lien Hung, Min-Nan Ou, Mitch M. C. Chou, Yang-Yuan Chen
Article
Materials Science, Multidisciplinary
H. C. Wu, D. J. Hsieh, T. W. Yen, P. J. Sun, D. Chandrasekhar Kakarla, J. L. Her, Y. H. Matsuda, C. K. Chang, Y. C. Lai, M. Gooch, L. Z. Deng, K. G. Webber, C. A. Lee, Mitch M. C. Chou, C. W. Chu, H. D. Yang
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)