Article
Chemistry, Physical
Chao Hou, Jingwen Deng, Jianxin Guan, Qirong Yang, Zhihao Yu, Yilin Lu, Zihan Xu, Zefan Yao, Junrong Zheng
Summary: The research reveals that laser irradiation can enhance the photoluminescence of monolayer MoS2, with different effects observed under different atmospheres, being more significant in the presence of oxygen. Additionally, physically adsorbed water also plays a role in enhancing the photoluminescence of monolayer MoS2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jiali Tai, Bing Wang, Deshuo Hu, Ping Xu, Zhibin Zhang
Summary: Two-dimensional transition metal dichalcogenides (TMDs) have properties beneficial for photodetector applications such as high carrier mobility and a wide range of band gaps. A photodetector based on exfoliated tungsten selenide (WSe2) shows stable and broadband photo response in the UV-Vis-NIR range, with a short response time, high responsivity, and detectivity. This work demonstrates the potential of WSe2 as a TMD for future applications.
Article
Chemistry, Physical
Cheng Zhang, Biyuan Zheng, Guangcheng Wu, Xueying Liu, Jiaxin Wu, Chengdong Yao, Yizhe Wang, Zilan Tang, Ying Chen, Lizhen Fang, Luying Huang, Dong Li, Shengman Li, Anlian Pan
Summary: In this study, In2Se3/WSe2 heterostructures were successfully synthesized via a two-step chemical vapor deposition (CVD) method. The integration of the strong light absorption layer In2Se3 nanosheet with the monolayer WSe2 significantly enhanced the photosensitivity of WSe2. The resulting In2Se3/WSe2 heterostructure device exhibited an ultrahigh photoresponsivity of 2333.5 A/W and a remarkable detectivity of 6.7 x 10(12) Jones under laser irradiation, making it one of the highest performing TMDCs-based heterostructures reported to date.
Article
Chemistry, Physical
Naizhang Sun, Han Ye, Ruge Quhe, Yumin Liu, Mingchao Wang
Summary: In this paper, we investigate the generation of PGE photo-current in six Janus transition metal dichalcogenides (MXY, M = Mo,W, X,Y = S,Se,Te) based on quantum transport simulations. We build photodetectors with non-collinear electrodes along zigzag and armchair directions using the spontaneous curling induced by the relaxation of intrinsic strain in Janus TMDs. PGE photocurrents can be observed when Janus TMDs have both curled and planar structures, and the influences of polarization angle and photon energy on the photocurrents are quantitatively demonstrated. The curled photodetector shows a significant enhancement in photocurrents, which can be attributed to the reduction of device symmetry.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Megha Patel, Sanjay Bhakhar, Chaitanya Limberkar, Preet Vyas, Abhishek Patel, G. K. Solanki
Summary: The paper presents the fabrication of a p-GeSe/n-Hf0.05Sn0.95Se2 heterostructure by depositing GeSe on Hf0.05Sn0.95Se2 crystal using thermal evaporation technique. The surface morphology and structural characteristics are studied by scanning electron microscopy and X-ray diffraction. The heterostructure is characterized by analyzing the I-V characteristics recorded under dark and illuminated conditions with the lowest ideality factor achieved under blue light illumination.
Article
Nanoscience & Nanotechnology
Seongin Hong, Seungho Baek, Thi Thu Thuy Can, Woon-Seop Choi, Sunkook Kim
Summary: The study presents MoS2 photodetectors fabricated using electrohydrodynamic jet printing, showing high photosensitivity and photoresponsivity in both two-terminal and three-terminal configurations. This new approach provides a feasible solution for TMD-based photonics with high performance.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Lei Wang, Shuai Zhang, Long Yan, Xiaohong Ji, Qinyuan Zhang
Summary: The electronic and optical properties of two-dimensional transition metal dichalcogenides can be tuned by doping strategy. In this study, spiral and monolayer Er-doped WS2 (WE) flakes were synthesized using ErCl3, WO3, and S as precursors. The growth and properties of WE flakes were systematically studied. It was found that the morphology, size, and thickness of WE flakes can be regulated by adjusting the molar ratio of ErCl3/WO3 and the growth time. The ErCl3 precursor acted as both the promoter of WE flakes' growth and the driver of screw dislocations formation.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Crystallography
Hui Chen, Jiwei Zhang, Dongxiao Kan, Jiabei He, Mengshan Song, Jianhua Pang, Songrui Wei, Kaiyun Chen
Summary: This review discusses the phase structures and phase transition properties of two-dimensional materials graphene and transition metal dichalcogenides (TMDs). It explores the various methods to trigger phase transitions and highlights the future opportunities and challenges in this field.
Article
Multidisciplinary Sciences
Omar Adnan Abbas, Adam Henry Lewis, Nikolaos Aspiotis, Chung-Che Huang, Ioannis Zeimpekis, Daniel W. Hewak, Pier Sazio, Sakellaris Mailis
Summary: Laser processing is a highly versatile technique for post-synthesis treatment and modification of TMDCs. In this study, direct, spatially selective synthesis of 2D TMDCs devices with excellent properties was achieved using laser printing under ambient conditions, providing a simple and elegant process that can be scaled for mass production. This approach offers a promising alternative to complex, capital-intensive methods currently used in TMDCs synthesis.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Tsung-Han Tsai, Anup Kumar Sahoo, Hong-Kai Syu, Yi-Chieh Wu, Meng-Yu Tsai, Ming-Deng Siao, Yueh-Chiang Yang, Yen-Fu Lin, Rai-Shung Liu, Po-Wen Chiu
Summary: In this study, a composite photodetector consisting of graphene-contacted monolayer WS2 stacked atop dispersed WSe2 nanodots was developed, achieving high responsivity, fast response time, and high gain. By utilizing the differences between photoexcited electrons and holes, a photogain was achieved through electron recirculation across the WS2 channel with trapped holes remaining in the WSe2 nanodots. Performance enhancement was attributed to the use of CVD-grown WSe2 nanocrystals as a photosensitizer, reducing contact barrier and providing rapid excitonic dynamics through the size-controllable WSe2/WS2 heterojunction.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Polymer Science
Qi Zhang, Yuan Liu, Meng Ding, Lihui Yuwen, Lianhui Wang
Summary: This study developed a laser-responsive hydrogel (MBA-CB Gel) that can effectively inactivate biofilms and whiten teeth under laser irradiation. The results demonstrate the potential of MBA-CB Gel as a promising platform for biofilm inactivation and tooth whitening.
Article
Chemistry, Physical
Sonu Prasad Keshri, Swapan K. Pati, Amal Medhi
Summary: In this study, we calculate the carrier mobility of monolayer HfSe2 using density functional perturbation theory and Boltzmann transport equation, and accurately determine the experimental value. Compared to the previously used deformation potential model, we find that the strong electron-optical phonon interaction is one of the reasons for the low mobility. The results also show that the spin-orbit coupling significantly affects the mobility and scattering rates.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jihyung Seo, Jiha Kim, Junghyun Lee, Donghwan Koo, Gyujeong Jeong, Yunseong Choi, Eun bin Son, Hyesung Park
Summary: In this study, a facile synthesis approach was developed to directly pattern transition metal dichalcogenides (TMDs) at the wafer scale with thickness controllability. The proposed patterning technique makes the application of 2D semiconductors in advanced electronic devices more viable.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Seohui Kang, Dongyeun Won, Heejun Yang, Chia-Hsien Lin, Ching-Shun Ku, Ching-Yu Chiang, Sera Kim, Suyeon Cho
Summary: This study investigates power-dependent laser thinning and phase control of semiconducting hexagonal MoTe2. Low-power laser thinning retains the crystal structure, while high-power laser thinning causes phase transition and chalcogen vacancies.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yong Xie, Onur Cakiroglu, Wenshuai Hu, Kexin He, Sergio Puebla, Thomas Pucher, Qinghua Zhao, Xiaohua Ma, Carmen Munuera, Andres Castellanos-Gomez
Summary: A laser trimming method is used to separate single-layer MoS2 from thicker regions, allowing for the fabrication of single-layer MoS2 channels with regular geometry. Electrical characterization and scanning photocurrent microscopy confirm the effective insulation of the single-layer region. This direct-write and lithography-free method provides an alternative to reactive ion etching for patterning MoS2 and similar two-dimensional materials.
Article
Chemistry, Multidisciplinary
Shun-Chieh Hsu, Yu-Ming Huang, Chung-Ping Huang, Ting-Yu Lee, Yu-Yun Cho, Yin-Hsin Liu, Arumugam Manikandan, Yu-Lun Chueh, Teng-Ming Chen, Hao-Chung Kuo, Chien-Chung Lin
Summary: Wrapping inorganic perovskite (CsPbBr3) quantum dots in SiO2 can enhance their resistance to external erosion, allowing for long-term storage with minimal changes in illumination capability. Different package architectures can lead to varying lifetimes, with up to 6000 hours achievable for these quantum dots, though further investigation is needed regarding the blue shift of emission wavelength.
Article
Chemistry, Physical
Yu-Shan Zhang, Bin-Mei Zhang, Yu-Xia Hu, Jun Li, Chun Lu, Ming-Jin Liu, Kuangye Wang, Ling-Bin Kong, Chen-Zi Zhao, Wen-Jun Niu, Wen-Wu Liu, Kun Zhao, Mao-Cheng Liu, Yu-Lun Chueh
Summary: Graphite, traditionally used in lithium-ion batteries, faces limitations due to its small interlayer spacing for sodium-ion insertion/extraction. An emerging approach involving chain-like H2N(CH2)xNH(2) between graphene oxide layers expands the interlayer spacing, enhances structure stability, and achieves excellent sodium storage performance.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ling Lee, Yu-Chuan Shih, Tzu-Yi Yang, Ying-Chun Shen, Yu-Chieh Hsu, Chun-Hsiu Chiang, Yi-Chung Wang, Bi-Hsuan Lin, Xioa-Yun Li, Shao-Chin Tseng, Mau-Tsu Tang, Faliang Cheng, Zhiming M. Wang, Yu-Lun Chueh
Summary: A reversible switching of local metallic Cu and semiconducting Cu2O phases in polycrystalline copper nanobelts was demonstrated through in situ current-induced oxidation. The manipulation of resistance in the nanobelts was achieved by applying a direct-current bias in air with opposite polarities, along with the assistance of Joule heating and electromigration. This study highlights the potential of using copper nanobelts for applications such as memristor arrays, thanks to their high on/off ratio, fast switching, and scalable production.
Review
Chemistry, Multidisciplinary
Wen-Jun Niu, Jin-Zhong He, Bing-Ni Gu, Mao-Cheng Liu, Yu-Lun Chueh
Summary: This review highlights the recent advances in transition metal single-atom catalysts supported by 2D materials for electrocatalytic oxygen reduction reaction (ORR). It discusses the advantages of 2D materials as supporting materials, the identification of active sites, possible catalytic mechanisms, and future perspectives in the field. Additionally, it summarizes the future opportunities and challenges of transition metal single-atom catalysts supported by 2D materials based on the current development trend of ORR catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Wen-Jun Niu, Qiao-Qiao Sun, Jin-Zhong He, Jiang-Lei Chen, Bingni Gu, Ming-Jin Liu, Chia-Chen Chung, Youzhi Wu, Yu-Lun Chueh
Summary: Copper single atoms anchored on nitrogen-doped porous carbon (Cu-N/PC) derived from zeolitic imidazolate frameworks (ZIFs) demonstrate highly efficient electrocatalytic activity for the oxygen reduction reaction (ORR). A nitrogen-rich bridge molecule, tubular g-C3N4 (TCN), can trap free Cu ions through electrostatic interaction, leading to Cu-ion-doped TCN which regulates the copper and nitrogen doping content, electronic structure, specific surface area, and pore diameter of Cu-N/PC. The Cu-N/PC catalyst exhibits a higher ORR activity than commercially available Pt/C catalyst, with a more positive onset potential and half-wave potential.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Kai Chen, Feng-Ju Chung, Yen-Ling Lin, Yen-Ta Lee, Maria del Rocio Rodriguez-Laguna, Arumugam Manikandan, Ming-Chang Lu, Yu-Lun Chueh
Summary: In this study, microencapsulated phase change materials Sn/a-C and SnBi/a-C micro-particles were successfully synthesized with good thermal stability. Different doping methods were utilized to enhance the heat capacity of the working fluid, reduce the thermal hysteresis, and broaden the working temperature range. These methods are significant for improving energy storage in solar thermal power plants and waste heat recovery.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Manami Goto, Ichiro Yamane, Shoki Arasawa, Takashi Yanase, Seiya Yokokura, Taro Nagahama, Yu-lun Chueh, Yongjun Shin, Yongmin Kim, Toshihiro Shimada
Summary: Different types of MoO2 and MoS2 nanostructures were successfully synthesized through chemical vapor deposition and sulfurization, with the involvement of MoOx suboxide and controllable thickness of MoS2 layers.
Article
Chemistry, Multidisciplinary
Ying-Chun Shen, Cheng-Yu Lee, Hsing-Hsiang Wang, Ming-Hsuan Kao, Po-Cheng Hou, Yen-Yu Chen, Wen-Hsien Huang, Chang-Hong Shen, Yu-Lun Chueh
Summary: Researchers have developed a flexible photodetector based on a two-dimensional Sb2Se3 film, which exhibits high photosensing current and detection ranges from visible to near-infrared. The photodetector was fabricated using an efficient field-effect transistor platform and showed quick response times and broadband absorption.
Article
Engineering, Environmental
Wen-Jun Niu, Ying-Yun Yan, Ru-Ji Li, Wei-Wei Zhao, Jiang-Lei Chen, Ming-Jin Liu, Bingni Gu, Wen-Wu Liu, Yu-Lun Chueh
Summary: In this proof-of-concept study, Fe nanoparticles encapsulated by nitrogen-doped carbon were evaluated and compared to Fe single atoms for boosting the catalytic activity of the oxygen reduction reaction (ORR) in Znair batteries. The Fe single atoms and Fe nanoparticles embedded in nitrogen-doped carbon exhibited excellent ORR performance with good stability and remarkable methanol tolerance. The strong interaction between the atomically dispersed Fe-Nx and adjacent Fe nanoparticles alters the electronic structure and enhances the electrocatalytic kinetics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mayur Chaudhary, Tzu-Yi Yang, Chieh-Ting Chen, Po-Chien Lai, Yu-Chieh Hsu, Yu-Ren Peng, Ashish Kumar, Chih-Hao Lee, Yu-Lun Chueh
Summary: This study demonstrates that the diffusion of metal ions can be modulated by defects in the switching medium, leading to the confinement of metal filaments in a precise 1D channel. This filament confinement achieved through defect engineering enables two interchangeable switching modes and could potentially address speed, size, and energy issues in computing.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kuangye Wang, Ling Lee, Sueh Liang Loo, Tzu-Yi Yang, Chieh-Ting Chen, Tzu-Wen Kuo, Jeng-Lung Chen, Hao-chung Kuo, Yu-Lun Chueh
Summary: Nitrogen-doped molybdenum diselenide (MoSe2) films with nanoscaled thicknesses were fabricated by ionizing N2 carrier gas in a plasma-assisted chemical vapor reaction furnace. The amount of nitrogen doping was controlled by the relative flow rate of N2. The nitrogen doping at different depths in the MoSe2 films resulted in different responses to NH3 and NO2 gases.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ying-Chun Shen, Yu-Wen Huang, Tzu-Yi Yang, Yi-Jen Yu, Hao-Chung Kuo, Tseung-Yuen Tseng, Yu-Lun Chueh
Summary: Al2O3 sandglass nanostructures (SNGSs) and AlN layer are used to prevent the overinjection of cations and localize the growth of conducting filaments in HfO (x) -based CBRAMs. The Cu/Al2O3 SNGSs/HfO (x) /AlN/TiN device shows stable on/off ratio for more than 6000 cycles, and the Te/Al2O3 SNGSs/HfO (x) /AlN/TiN device exhibits multilevel cell characteristic and excellent potentiation and depression nonlinearities.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yu-Chieh Hsu, Yan-Yu Chen, Jia-Min Shieh, Wen-Hsien Huang, Chang-Hong Shen, Yu-Lun Chueh
Summary: A pulsed laser annealing method is used to directly synthesize nickel silicide (NiSi) as a contact material to improve the contact of electric devices. The integration of NiSi into different devices significantly improves their performance.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hsiao-Chien Wang, Chih-Ming Hsu, Bingni Gu, Chia-Chen Chung, Shu-Chi Wu, P. Robert Ilango, Jian-Shiou Huang, Wen-Chun Yen, Yu-Lun Chueh
Summary: The growth of helical Si@Cu3Si nanorod arrays via glancing angle deposition followed by an annealing process resulted in materials with high capacity, high electrical conductivity, and precise control spacing behavior. The Si@Cu3Si nanorod arrays exhibited superior volumetric capacity and cycling stability in half cells, showing potential for the development of Si-based electrode materials.
Article
Materials Science, Multidisciplinary
Sumit Shahajirao Bhosale, Sudhakar Narra, Efat Jokar, Arumugam Manikandan, Yu-Lun Chueh, Eric Wei-Guang Diau
Summary: A simple synthesis method was used to prepare stable red-emitting perovskite nanocrystals with compact surface structures rich in halides, enabling surface-defect passivation. These nanocrystals exhibited different red spectral shifts with high quantum yields and remarkable stability in various solutions.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)