Article
Nanoscience & Nanotechnology
Chaehyeon Ahn, Younghee Park, Seunghyun Shin, Jong-Guk Ahn, Intek Song, Youngjoon An, Jaehoon Jung, Chung Soo Kim, Jee Hyeon Kim, Jiwon Bang, Daehyun Kim, Jaeyoon Baik, Hyunseob Lim
Summary: In this study, MoOCl4 was utilized as the precursor for Mo, enabling facile growth of high-quality monolayer and multilayer MoS2 films by accurately controlling the growth pressure. Two growth modes, primarily physisorption and chemisorption of MoOCl4, were identified, allowing for precise control of MoS2 thickness based on application requirements. The use of carbon-free precursors eliminated concerns about carbon contamination in the produced MoS2 films.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yeonjoon Jung, Huije Ryu, Hangyel Kim, Donghoon Moon, Jaewoong Joo, Seong Chul Hong, Jinwoo Kim, Gwan-Hyoung Lee
Summary: Two-dimensional (2D) materials and their heterostructures have great potential in next-generation optoelectronics, spintronics, valleytronics, and electronics. Mechanical exfoliation of flakes is currently the most common method to obtain high-quality 2D materials due to the difficulty of precisely controlling the growth process and synthesizing a single domain.
Article
Chemistry, Physical
Dongxu Wang, Lei Wang, Yanqing Jiao, Aiping Wu, Haijing Yan, Xin Kang, Chungui Tian, Jiancong Liu, Honggang Fu
Summary: Researchers have designed a catalyst with abundant active sites that can effectively achieve the hydrodesulfurization process in clean fuel oil production. This catalyst has plentiful edge-active sites, which enables it to perform better in the hydrodesulfurization reaction.
Article
Chemistry, Multidisciplinary
Ran Guan, Junxi Duan, Aiheng Yuan, Zhuofan Wang, Shuai Yang, Luoqiao Han, Bo Zhang, Dejun Li, Birong Luo
Summary: By rationally designing the heating evaporation rates of sulfur and MoO3 precursors in a CVD system, the intermediate product of MoO3-x in MoS2-MoO3-x hybrids can be largely inhibited. The appropriate ratio of sulfur sublimation versus evaporated MoO3 powder is revealed as the key factor for inhibiting intermediates and obtaining high-quality MoS2 crystals.
Article
Chemistry, Multidisciplinary
Dohyun Rhuy, Youjin Lee, Ji Yoon Kim, Chansoo Kim, Yongwoo Kwon, Daniel J. Preston, In Soo Kim, Teri W. Odom, Kibum Kang, Dongwook Lee, Won-Kyu Lee
Summary: This paper presents an approach to develop ultra-efficient catalysts for the hydrogen evolution reaction (HER) using low-cost, bulk multilayer MoS2. By transferring MoS2 flakes to gold thin films and inducing a local phase transition through surface wrinkles, the authors achieved HER activity comparable to platinum. The superior performance was attributed to the combined effect of the phase transition and improved charge transfer resistance through desulfurization.
Article
Chemistry, Physical
Kuo Cao, Shiwei Sun, Aiying Song, Jinxiao Ba, Haowen Lin, Xianghai Yu, Chengqun Xu, Bingjun Jin, Jan Huang, Donghua Fan
Summary: A new strategy was developed to prepare MoS2 @CoS2/G electrocatalysts with high-percentage metallic 1T-MoS2 phase, which exhibited excellent catalytic activity and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Qi-Bo Wang, Qin-Qin Xu, Ming-Zhe Yang, Zhong-Shuai Wu, Xiao-Chuan Xia, Jian-Zhong Yin, Zhen-Hua Han
Summary: A novel pressure-induced supercritical phase nucleation method is proposed for synthesizing monolayer MoS2 films, without the need for promoters. The method avoids contamination from heterogeneous promoters seen in existing techniques. The size of MoS2 crystals on the substrate is influenced by the wetting area of precursor droplets, while the formation of continuous films is controlled by the coalescence of droplets. The nucleation site density can be adjusted by the supersaturation of the supercritical fluid solution, providing new possibilities for controlled growth of MoS2 and other two-dimensional materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yoobeen Lee, Jin Won Jung, Jin Seok Lee
Summary: The reduction of intrinsic defects, including vacancies and grain boundaries, remains one of the greatest challenges to produce high-performance transition metal dichalcogenides (TMDCs) electronic systems. A newer sulfurization approach using diethyl sulfide as a precursor has been proposed to grow WS2 films on SiO2/Si substrates, resulting in films with outstanding electrical conductivity. The uniform supply of S atoms and accurate sulfurization process were confirmed through comprehensive optical and chemical analyses, showing great potential for industrial applications.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Xinxin Wang, Haobo Liu, Gaojie Li, Guanghou Wang, Jianguo Wan
Summary: This study investigates the piezoelectric properties of MoS2 through oxygen adsorption (O@MoS2) and reveals that the piezoelectricity is enhanced in multilayer structures, contrary to the usual odd-layer limitation. The enhanced piezoelectricity is attributed to improved interlayer interaction and polarization perpendicular to the basal plane. The study suggests that O@MoS2 has great potential for piezoelectric applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Arslan Ashfaq, Sofia Tahir, Ubaid Ur Rehman, Adnan Ali, Khalid Mehmood, Fareeha Ashfaq, Waqas Ahmad, Khushi Muhammad Khan, M. Haneef, H. M. Shammas Mushtaq, Nasir Amin, Rabia Saeed, Kainat Shabbir
Summary: Two-dimensional transition metal dichalcogenide semiconductors (TMDCs) like MoS2 are popular as thermoelectric materials due to their abundance, non-toxicity, and good performance. In this study, MoS2 thin films were prepared by sputtering and post-sulfurization at different temperatures, and characterized using XRD, Raman spectroscopy, and SEM. The results show that the enhancement of the Seebeck coefficient and electrical conductivity in the MoS2 thin films is attributed to the improved crystal structure of the 2H phase, which leads to increased carrier mobility.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Adriain Dewambrechies, Alexander Yu. Polyakov, Betul Kucukoz, Timur O. Shegai
Summary: In this study, the formation of strained ultrasharp zigzag edges in MoS2 multilayers produced by anisotropic wet etching is analyzed. The topography of the edges is determined by the relative stability of different crystallographic directions and interlayer interactions. The spectroscopic characteristics of these edges, including enhanced second-order nonlinearity, are studied, and it is confirmed that ultrasharp hexagonal nanoholes in MoS2 grow along the most stable crystallographic directions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Salvatore E. Panasci, Antal Koos, Emanuela Schiliro, Salvatore Di Franco, Giuseppe Greco, Patrick Fiorenza, Fabrizio Roccaforte, Simonpietro Agnello, Marco Cannas, Franco M. Gelardi, Attila Sulyok, Miklos Nemeth, Bela Pecz, Filippo Giannazzo
Summary: In this study, a comprehensive investigation on the properties of 2H-MoS2 obtained by sulfurization was conducted. The sulfurization process was effective in reducing the oxide to MoS2, and the structural and defect characteristics of the film were found to be correlated with the film thickness.
Article
Chemistry, Multidisciplinary
Min-Hye Jeong, Hyun-Soo Ra, Sang-Hyeon Lee, Do-Hyun Kwak, Jongtae Ahn, Won Seok Yun, JaeDong Lee, Weon-Sik Chae, Do Kyung Hwang, Jong-Soo Lee
Summary: This study proposes periodically arrayed nanopore structures (PANS) to improve the efficiency of multilayered p-WSe2/n-MoS2 phototransistors. Experiments and theoretical calculations reveal that heterojunction devices with PANS exhibit higher responsivity and detectivity, representing a significant step towards next-generation optoelectronic applications.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Myung Jin Park, Steven Gravelsins, Dong Heon Shin, Byung Hee Hong, Al-Amin Dhirani
Summary: Taking a solution-based approach to obtain transition metal dichalcogenide monolayers offers several advantages, including scalable processing, cost-effectiveness, and the ability to tune monolayer functionality through solution chemistry. Stacking two-dimensional network films layer-by-layer on different substrates allows control over the chemical nature, shape, and position of each layer, resulting in multilayers with increased electrical conductivity and photoconductivity. The scalability and ease of device fabrication provided by this approach open up a wide range of applications for solution-based 2D materials.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kate Reidy, Wouter Mortelmans, Seong Soon Jo, Aubrey N. Penn, Alexandre C. Foucher, Zhenjing Liu, Tao Cai, Baoming Wang, Frances M. Ross, R. Jaramillo
Summary: Oxidation of transition metal dichalcogenides(TMDs) is easily occurs under various conditions. Understanding the oxidation processes is necessary for successful handling and fabrication of TMD devices. In this study, we examined the atomic-scale oxidation mechanisms of MoS2, the most widely studied TMD. Our findings show that thermal oxidation results in α-phase crystalline MoO3 with sharp interfaces, voids, and crystallographic alignment with the underlying MoS2. Experiments with remote substrates reveal that thermal oxidation proceeds via vapor-phase mass transport and redeposition, which poses a challenge in forming thin, conformal films. Oxygen plasma accelerates the oxidation kinetics, leading to the formation of smooth and conformal oxides. The resulting amorphous MoO3 can be grown with subnanometer to several-nanometer thickness, and we calibrated the oxidation rate for different instruments and process parameters. These quantitative results provide guidance for managing the atomic-scale structure and thin-film morphology of oxides in the design and processing of TMD devices.
Article
Engineering, Electrical & Electronic
K-H Kao, C. Godfrin, A. Elsayed, R. Li, E. Simoen, A. Grill, S. Kubicek, I. P. Radu, B. Govoreanu
Summary: This study investigates the quality of four different gate stacks for cryogenic MOS devices by analyzing the oxide trap density, transconductance, Hall mobility, and critical density. The results provide valuable insights into the material physics at cryogenic temperatures.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Abhijit Gogoi, Erik C. Neyts, Milorad V. Milosevic, Francois M. Peeters
Summary: Graphene oxide (GO) is a promising membrane material with superior separation performance and stability. However, its practical implementation is challenging due to undesirable swelling in water. This study shows that dissociation of water molecules into H3O+ and OH- ions affects the stability and performance of layered GO membranes. The presence of H3O+ and OH- ions leads to the formation of clusters that hinder water and salt ion permeance through the membrane. These clusters can be controlled by an external electric field, enabling tailored membrane performance. Moreover, the H3O+ and OH- ions enhance the stability of the hydrogen bond network between water molecules and GO layers, reducing water permeance and preventing undesirable swelling of the membrane.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Coatings & Films
J. -F. de Marneffe, D. Marinov, A. Goodyear, P. -j. Wyndaele, N. St. J. Braithwaite, S. Kundu, I. Asselberghs, M. Cooke, S. De Gendt
Summary: This study investigates the etching of HfO(2) and ZrO2 high-k dielectrics using plasma enhanced atomic layer etching. The results show that atomic layer etching can effectively prevent material loss or damage to WS2 under appropriate etching conditions.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
Parisa Nematollahi, Bernardo Barbiellini, Arun Bansil, Dirk Lamoen, Jia Qingying, Sanjeev Mukerjee, Erik C. Neyts
Summary: In this study, the electronic structures of three FeN4 catalytic centers with different local topologies were investigated using first-principles calculations. The mechanism of their ORR activity in acidic electrolytes was unraveled, with a focus on a forgotten synthetic pyridinic Fe-N coordination. The study demonstrates that this catalyst can exhibit excellent activity for promoting direct four-electron ORR by adding a fifth ligand. Sites with good stability properties were also identified through the use of calculations and spectroscopy data.
Article
Chemistry, Multidisciplinary
Tom Schram, Surajit Sutar, Iuliana Radu, Inge Asselberghs
Summary: This article introduces the applications of large-area 2D-material-based devices in sensor or photonics devices and the back end of line (BEOL), and discusses the requirements, development status, and gaps to be bridged for the full wafer integration of aggressively scaled 2D-based logic circuits.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Attila Kovacs, Maksudbek Yusupov, Iris Cornet, Pieter Billen, Erik C. Neyts
Summary: This study investigates the influence of natural deep eutectic solvents (NADES) with various molar compositions on the stability and structure of enzymes using molecular dynamics simulations. The results show that the studied NADES systems do not significantly disrupt the microstructure of the solvent or the stability of the enzyme. The enzyme maintains its initial structure and hydrogen bonds in all investigated compositions, including NADES with increased hydrogen bond donating compound ratios. The molar ratio can be an additional variable to fine-tune the physicochemical properties of NADES without altering the enzyme characteristics.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Parisa Nematollahi, Erik C. Neyts
Summary: This study identified two active sites in pyrolyzed Fe-N-C materials, studied their influence on the nitrogen reduction reaction (NRR), and investigated the impact of NH2 adsorption as a functional ligand on catalyst performance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Niels Claessens, Zamran Zahoor Khan, Negin Rahnemai Haghighi, Annelies Delabie, Andre Vantomme, Wilfried Vandervorst, Johan Meersschaut
Summary: We present a site-specific elemental analysis technique based on Rutherford backscattering spectrometry (RBS) for nano-scale structure studies. This method achieves a very good limit of detection by probing a large ensemble of identical nanostructures and utilizes the energy loss effects of backscattered ions to distinguish signals from different locations. Spectrum deconvolution is performed with ion-trajectory calculations, enabling the analysis of Ru area-selective deposition on SiO2-TiN line-space patterns.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Antony Premkumar Peter, Alfonso Sepulveda Marquez, Johan Meersschaut, Praveen Dara, Timothee Blanquart, Takayama Tomomi, Ebisudani Taishi, Shiba Elichiro, Yosuke Kimura, Sander van Gompel, Pierre Morin
Summary: This study reports the impact of process conditions and post annealing treatment on the stress and physico-chemical properties in different types of plasma enhanced atomic layer deposited (PEALD) SiNx films. The results show that it is possible to form compressive SiN films with reduced hydrogen content at 500°C by controlling the plasma conditions during the deposition process. These compressive films with low hydrogen concentration exhibit high thermo-mechanical stability compared to other types of SiN films.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2022)
Article
Chemistry, Physical
Kristof M. Bal, Erik C. Neyts
Summary: We calculate bubble nucleation rates in a Lennard-Jones fluid using molecular dynamics simulations and validate common modeling techniques. The results show consistent rate predictions from different methods, except for the rates derived from forward flux sampling simulations, which are outliers.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Z. Javdani, N. Hassani, F. Faraji, R. Zhou, C. Sun, B. Radha, E. Neyts, F. M. Peeters, M. Neek-Amal
Summary: The recent advances in the fabrication of artificial nanochannels have allowed for new research on the transport, permeance, and selectivity of various gases and molecules. However, the presence of unwanted molecules such as hydrocarbons can contaminate and clog the nanochannels, affecting their functionality.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Zhengwei Tan, Julius de Rojas, Sofia Martins, Aitor Lopeandia, Alberto Quintana, Matteo Cialone, Javier Herrero-Martin, Johan Meersschaut, Andre Vantomme, Jose L. Costa-Kramer, Jordi Sort, Enric Menendez
Summary: Magneto-ionics is a promising technology for energy-efficient spintronics, but the post-stimulated behavior of magneto-ionic systems is not well-controlled. In this study, we demonstrate a voltage-controllable N ion accumulation effect on the outer surface of CoN films, allowing for control of magneto-ionic properties during and after voltage pulse actuation. This effect has potential applications in neuromorphic computing, such as post-stimulated neural learning.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Rachel A. A. Nye, Kaat Van Dongen, Jean-Francois de Marneffe, Gregory N. N. Parsons, Annelies Delabie
Summary: Area-selective deposition (ASD) has potential for sub-10 nm manufacturing, but scaling to ultrasmall dimensions and understanding feature-dependent nonuniformity and selectivity loss remains challenging. This work addresses these challenges by quantifying uniformity and selectivity for passivation/deposition/etch supercycles in 45 nm half-pitch TiN/SiO2 line/space patterns. Three selective processes were used: DMA-TMS inhibition, TiO2 ALD, and HBr/BCl3 plasma etch. By employing three supercycles, this work achieves 8 nm of TiO2 with high uniformity and selectivity, improving on previous reports in similar nanoscale patterns. Integrated consideration of uniformity and selectivity will aid the design of selective deposition processes for nanoscale electronic devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Physics, Fluids & Plasmas
Fahim Faraji, Mehdi Neek-Amal, Erik C. Neyts, Francois M. Peeters
Summary: Molecular dynamics simulations were conducted to investigate the influence of different cations on the permeation of charged polymers through narrow capillaries. It was discovered that Li+, Na+, and K+ cations, despite being monovalent, have distinct effects on polymer permeation and subsequent transmission speed. This phenomenon was attributed to the interplay between cations' hydration free energies and the hydrodynamic drag experienced by the polymer. Additionally, alkali cations exhibited surface-to-bulk preferences in small water clusters under an external electric field. The paper presents a new approach to controlling the speed of charged polymers in confined spaces using cations.
Article
Engineering, Electrical & Electronic
Mattia Pasquali, Patrick Carolan, Stefanie Sergeant, Johan Meersschaut, Valentina Spampinato, Thierry Conard, Alessandro Viva, Stefan De Gendt, Silvia Armini
Summary: Area-selective deposition (ASD) is a bottom-up material deposition process that shows great potential in semiconductor manufacturing. In this study, we investigated ASD enabled by 1-octadecanethiol (ODT)-derived self-assembled monolayer (SAM) passivation on 10 nm-wide dielectric spacings. The results showed that as the pattern features shrink, the lateral expansion of the ALD film becomes a more stringent limitation to the ASD resolution.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Mengjiao Dong, Liyun Liao, Chensheng Li, Yingxiao Mu, Yanping Huo, Zhong-Min Su, Fushun Liang
Summary: This study investigates the influence of the polarity of polymer matrices on persistent room-temperature phosphorescence (pRTP). It is discovered that intense phosphorescence emission can be achieved in highly polar matrices such as polyacrylic acid (PAA). The dipole-dipole interaction between the polar fluorophore and polar matrix is proposed to stabilize the excited state and facilitate the generation of efficient room-temperature phosphorescence emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Han-Jiang Yang, Weijia Xiang, Xiangzhou Zhang, Jin-Yun Wang, Liang-Jin Xu, Zhong-Ning Chen
Summary: This article reports a 2D copper(I)-based cluster material for X-ray imaging, which exhibits ultra-high spatial resolution, high photoluminescence efficiency, and low detection limit. The material shows excellent linear response to X-ray dose rates and light output, and has the best spatial resolution among reported lead-free metal halide hybrids.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Dayeong Kwon, Jinsoo Joo
Summary: Donor-acceptor heterostructures using organic-inorganic halide perovskites, two-dimensional transition metal dichalcogenides, pi-conjugated organic small/macro molecules, and quantum dots are promising platforms for exciton-based photonics and optoelectronics. Hetero-interlayer excitons and hetero-intermolecular excitons formed through optical and/or electrical charge transfer in various heterostructures are important quasi-particles for light emission, detection, and harvesting systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Zhen-kun Tang, Rui Tan, Yee Sin Ang
Summary: We investigate the interface properties between WSi2N4 and Mo2B, O-modified Mo2B, and OH-modified Mo2B nanosheets. We find that WSi2N4 and Mo2B form n-type Schottky contacts, while functionalizing Mo2B with O and OH leads to the formation of both n-type and p-type ohmic contacts with WSi2N4. Additionally, we demonstrate the emergence of quasi-ohmic contact with ultralow lateral Schottky barrier and zero vertical interfacial tunneling barriers in Mo2B(OH)2-contacted WSi2N4.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ga Eun Kim, Hae-Jin Kim, Heesuk Jung, Minwoo Park
Summary: This study presents a solution to the commercialization challenges of flexible LEDs based on MAPbBr(3) by incorporating polyurethane and an In-Ga-Zn-Sn liquid alloy. The designed devices showed high flexibility, efficiency, and durability, with improved electron injection and reduced defects, making them promising for next-generation displays.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tao Shen, Zeng Wu, Zhen Jiang, Dongsheng Yan, Yan Zhao, Yang Wang, Yunqi Liu
Summary: Sidechain engineering is an important molecular design strategy for tuning the solid-state packing and structural ordering of conjugated polymers. The effects of sidechain direction on the optoelectronic properties of polymers and device performance were systematically investigated in this study. The results demonstrate that tuning the sidechain substitution direction can effectively improve the molecular structure and light absorption properties of polymers, providing new insights for the rational design of functional polymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Lotte Clinckemalie, Bapi Pradhan, Roel Vanden Brande, Heng Zhang, Jonathan Vandenwijngaerden, Rafikul Ali Saha, Giacomo Romolini, Li Sun, Dirk Vandenbroucke, Mischa Bonn, Hai I. Wang, Elke Debroye
Summary: In this study, a facile strategy using a non-conductive polymer was proposed to fabricate stable, pinhole-free thick films. The effect of introducing a second phase into CsPbBr3 perovskite crystals on their photophysical properties and charge transport was investigated. The dual phase devices exhibited improved stability and more effective operation at higher voltages in X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jiangchao Han, Daming Zhou, Wei Yang, Chen Lv, Xinhe Wang, Guodong Wei, Weisheng Zhao, Xiaoyang Lin, Shengbo Sang
Summary: Rare type-II spin-gapless semiconductors (SGSs) have attracted increasing attention due to their unique spin properties. In this study, the interface contacts and spin transport properties of different devices composed of VSi2P4 ferromagnetic layers were investigated. The results show that VSi2P4 is a promising material for designing vertical van der Waals heterostructures with a giant tunnel magnetoresistance (TMR) in spintronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tianqi Zhao, Renagul Abdurahman, Qianting Yang, Ruxiangul Aiwaili, Xue-Bo Yin
Summary: In this study, we designed and prepared Cr and Ba-doped gamma-Ga2O3 nanoparticles to achieve near-infrared emission and enhance the emission intensity. The emission mechanism was proposed based on the trap depth, band gap, and energy levels of Cr ions. The ratiometric temperature sensing and encryption information transfer demonstrated the potential applications of this technology.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ikumi Aratani, Yoji Horii, Yoshinori Kotani, Hitoshi Osawa, Hajime Tanida, Toshiaki Ina, Takeshi Watanabe, Yohko F. Yano, Akane Mizoguchi, Daisuke Takajo, Takashi Kajiwara
Summary: In this study, two-dimensional arrays of single-molecule magnets (SMMs) based on metal-organic frameworks (MOFs) were systematically modified through Langmuir-Blodgett methods and chemical modifications. The introduction of bulky alkoxide groups induced structural changes and perpendicular magnetic anisotropy. This research provides a promising strategy for the construction of high-density magnetic memory devices using molecular spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Zonghao Lei, Houhe Dong, Lijie Sun, Bing Teng, Yanfei Zou, Degao Zhong
Summary: Researchers have successfully developed four different up-conversion phosphors based on the Eulytite-type host Ba3Yb(PO4)(3). The optical temperature sensing properties of these phosphors were thoroughly investigated, and it was found that Ba3Yb(PO4)(3):Tm/Er/Ho showed potential for optical temperature measurement applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
C. Roncero-Barrero, M. A. Carvajal, J. Ribas-Arino, I. de P. R. Moreira, M. Deumal
Summary: This study computationally investigates the conductivity of four isostructural compounds with different Se contents, and reveals the parameters that define their conductivity in stable organic radical materials. The results provide insights into the influence of Se content on the conductivity and highlight the importance of considering multiple parameters in understanding the trends in conductivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Remi Arras, Kedar Sharma, Lionel Calmels
Summary: In this study, we investigated the interplay between structural defects in NiFe2O4, showing that the complex formed by a Ni-Oh/Fe-Td-cation swap and a neutral oxygen vacancy is more stable than these two isolated defects, and significantly reduces the width of the minority-spin band gap.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
