Article
Nanoscience & Nanotechnology
Yungeng Zhang, Yaxuan Wu, Chao Jin, Fengzhu Ren, Bing Wang
Summary: The B2S3 monolayer, predicted through ab initio calculations and global particle-swarm optimization method, is a new semiconductor with high electron mobility and a direct band-gap that can be manipulated under biaxial strain. It can efficiently absorb sunlight in the visible light spectrum and holds good dynamical, thermal, and mechanical stabilities, making it a promising candidate for future applications in high-speed (opto)electronic devices.
Article
Chemistry, Multidisciplinary
Lingling Bai, Yifan Gao, Junhao Peng, Xing Xie, Minru Wen, Huafeng Dong, Xin Zhang, Le Huang, Fugen Wu
Summary: Arsenene in the zigzag direction can achieve near-zero Poisson's ratio, with a smaller Poisson's ratio suitable for precision instruments. It has potential applications in infrared and visible optoelectronic devices.
Article
Chemistry, Physical
Wenxin Wang, Xiaoning Yang
Summary: This study investigates the effects of embedded BN domains of different shapes, sizes, and numbers on the electrical properties and thermodynamic stability of 2-D h-BNC nanohybrids. It is demonstrated that multiple small BN domains can effectively achieve a wide range of tunable band gap engineering of graphene, better than single large BN domains. Additionally, multiple BN domain-modified graphene maintains the excellent carrier mobility of intrinsic graphene.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Wei Zhang, Changchun Chai, Qingyang Fan, Minglei Sun, Yanxing Song, Yintang Yang, Udo Schwingenschlogl
Summary: A novel two-dimensional germanium carbide material, tetrahex-GeC2, with narrow direct band gap, high electron mobility, and excellent optical properties has been proposed in this study, showing great potential in the fields of nanoelectronics, optoelectronics, and photovoltaics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Multidisciplinary
Xiao-Juan Ye, Biao-Hua Wei, Chun-Sheng Liu
Summary: Te2Br is a one-dimensional van der Waals material formed by periodically stacking single-chain atomic crystal. First-principles calculations show that Te2Br has lower cleavage energy and remarkable flexibility, with a unique band gap transition effect. These nanochains with moderate band gaps have potential applications in optoelectronic devices with UV-visible photoresponse.
Article
Chemistry, Physical
Michele Pizzochero, Efthimios Kaxiras
Summary: This study investigates armchair graphene nanoribbons with asymmetric edge extensions consisting of laterally fused naphtho groups, showing tunability of pi-magnetism induced by naphtho groups. These structures exhibit full spin-polarization at band extrema and the ferromagnetic ground state can be manipulated into nonmagnetic or antiferromagnetic phases through external stimuli. This work establishes these one-dimensional architectures as suitable platforms for logic spintronics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Mechanical
Xiaohua Liu, Ning Chen, Junrui Jiao, Jian Liu
Summary: This paper presents a computationally designed pneumatic soft phononic crystal for tunable band gap. By mechanically generating deformation through air pressure, the band gap in the crystal can be opened or closed, and its width can be adjusted. The study shows that pneumatic manipulation is a low-cost, fast, and easily integrated means compared to traditional mechanical deformation methods.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Shaohua Lu, Yiyuan Cai, Xiaojun Hu
Summary: A novel polymorph of hexagonal B3S monolayer is proposed using structure swarm intelligence and first-principles calculations, showing stability and tunable electronic properties. The semiconductor material can be transformed into metallic state or enhanced in optical absorption and carrier mobility through surface functionalization. Additionally, it exhibits satisfactory storage capacity for H-2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jing Zhang, Zhilong Yang, Shuai Liu, Wei Xia, Tongshuai Zhu, Cheng Chen, Chengwei Wang, Meixiao Wang, Sung-Kwan Mo, Lexian Yang, Xufeng Kou, Yanfeng Guo, Haijun Zhang, Zhongkai Liu, Yulin Chen
Summary: Quantum well states (QWSs) are widely used in electronic and optical devices, and are usually crucial for device performance. This study directly probes and manipulates QWSs generated on the vacuum interface of Nb2SiTe4 material using two techniques. The material is considered to be a promising semiconductor system for device applications.
Article
Multidisciplinary Sciences
Natalia Cortes, Oscar Negrete, Francisco J. Pena, Patricio Vargas
Summary: The electrocaloric effect in graphene structures can be influenced by external electric fields, with different stacking arrangements resulting in different thermal responses. In certain stacking configurations, both direct and inverse electrocaloric responses may occur within the same sample.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Feng Fei Zhang, Eva Aw, Alexander G. Eaton, Rebecca R. C. Shutt, Juhwan Lim, Jung Ho Kim, Thomas J. Macdonald, Cesar I. I. I. D. L. Reyes, Arjun Ashoka, Raj Pandya, Oliver D. Payton, Loren Picco, Caroline E. Knapp, Furio Cora, Akshay Rao, Christopher A. Howard, Adam J. Clancy
Summary: By ionically etching and dissolving, arsenic-phosphorus alloy nanoribbons (AsPNRs) have been created with small band gap, high electrical conductivity, and high hole mobilities. These properties make AsPNRs suitable for electronic devices such as near-infrared detectors, quantum computing, and solar cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Dongchun Zheng, Xiao-Li Zhao, Xueqi Yan, Weimin Xuan, Qi Zheng, Lianjun Wang, Wan Jiang
Summary: A family of transition-metal doped Ti-oxo clusters with diverse core structures have been successfully synthesized. Their photocurrent responses can be tuned by varying the heterometals, and the cobalt-doped cluster exhibits the highest H-2 evolution activity (32.5 mu mol g(-1) h(-1)) with good stability.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
Bhuvneshwer Suthar, Narendra Kumar, Sofyan A. Taya
Summary: This article analyzes the multichannel transmission behavior of a 1D binary photonic crystal composed of silver/silicon. The study shows that the photonic crystal exhibits better response to multichannel transmission in TE mode compared to TM mode, with sharper characteristics. The shifting of transmission peaks differs when changing the thickness of different layers, and equally spaced peaks for fixed parameters demonstrate multichannel filtering characteristics. Additionally, the photonic crystal demonstrates better multichannel transmission behavior at low plasma frequency with less broadening. The insights from this study offer novel ideas for designing optical devices.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Chemistry, Physical
Javier Gainza, Orlando N. Guinazu, Eva Cespedes, Horacio Falcon, Jose Luis Martinez, Jose Antonio Alonso
Summary: In this study, MnIn2S4 polycrystalline samples with tunable degree of inversion were prepared using a rapid high-pressure synthetic method. The crystal structure refinement showed a positive correlation between the inversion degree and properties such as band gap and magnetic behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Wei Shangguan, Cuixia Yan, Wenqing Li, Chen Long, Liming Liu, Chenchen Qi, Qiuyang Li, Yan Zhou, Yurou Guan, Lei Gao, Jinming Cai
Summary: A new class of two-dimensional semiconductor materials with a wide band gap, excellent stability, and high mobility has been discovered. These materials have great potential for applications in optics and electronic devices.
Article
Physics, Multidisciplinary
In-Ho Lee
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2020)
Article
Multidisciplinary Sciences
In-Ho Lee, Mingze He, Xi Zhang, Yujie Luo, Song Liu, James H. Edgar, Ke Wang, Phaedon Avouris, Tony Low, Joshua D. Caldwell, Sang-Hyun Oh
NATURE COMMUNICATIONS
(2020)
Article
Nanoscience & Nanotechnology
Ahsan Noor, Anoop R. Damodaran, In-Ho Lee, Stefan A. Maier, Sang-Hyun Oh, Cristian Ciraci
Article
Multidisciplinary Sciences
Sergey G. Menabde, In-Ho Lee, Sanghyub Lee, Heonhak Ha, Jacob T. Heiden, Daehan Yoo, Teun-Teun Kim, Tony Low, Young Hee Lee, Sang-Hyun Oh, Min Seok Jang
Summary: The acoustic plasmon mode in a graphene-dielectric-metal structure shows strong light-matter interaction with relatively small propagation loss, allowing for real-space mapping under ambient conditions.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Hyein Ha, Young Jae Shim, Da Hwan Lee, Eun Young Park, In-Ho Lee, Seok-Keun Yoon, Min Chul Suh
Summary: A new small-molecular thermally cross-linkable material PbV was synthesized for hole transport layers in wet processed OLEDs, showing high glass temperatures and a triplet energy. By blending PbV with polymeric HTM, a semi-interpenetrating network was formed, leading to significantly improved efficiency and lifetime of the OLED device.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Seonyeong Kim, Dong Hoon Shin, Yong-Sung Kim, In-Ho Lee, Chang-Won Lee, Sunae Seo, Suyong Jung
Summary: The energy band alignments and material properties at the contacts between metal and 2D semiconducting transition metal dichalcogenide films are essential for electronic and optical device applications. Vertical diodes with asymmetric metal-SCTMD contact areas were used to study contact-limited charge flows in tunneling and emission transport regimes. The experimental and analytical approaches demonstrated in this research provide a powerful tool for evaluating metal-SCTMD contacts qualitatively and quantitatively.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
In-Ho Lee, K. J. Chang
Summary: This method uses machine learning to predict new low-energy crystal structures by generating crystal replicas with similar features through radial distribution functions and variational autoencoder. Additionally, energy minimization is performed on selected crystal structures through first-principles electronic structure calculations to obtain the predicted crystal structures.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Physics, Applied
In-June Hwang, Dal-Jae Yun, Jeong-Il Park, Young-Pyo Hong, In-Ho Lee
Summary: The study proposes dual-band filters made from a single-layer metasurface for 5G communication systems, designed and fabricated using a global optimization technique to operate on the 28 and 39 GHz bands, with the ability to achieve different functions and high performance in the passband and stop band regions.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yoon-Gu Kang, In-Ho Lee, Myung Joon Han, Kee Joo Chang
Summary: First-principles density functional calculations have revealed the presence of nontrivial band topology and superconductivity in three metallic Si allotropes, including Cmcm-Si-4 and I4/mmm-Si-4 predicted in this study, and previous theoretical calculations proposed Cmmm-Si-4. These metastable allotropes maintain crystalline structure under ambient pressure and exhibit superconductivity with critical temperatures ranging from 1.2 to 11.4 K. Topological characteristics of electronic states were investigated, showing weak topological nature in all three allotropes, with a clear identification of a surface Dirac point in Cmcm-Si-4.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Sung Jong Lee, Keehyoung Joo, Sangjin Sim, Juyong Lee, In-Ho Lee, Jooyoung Lee
Summary: This paper presents a method called CRFalign for sequence-structure alignment of proteins, which achieves good alignment accuracy and template search performance for remote homologue target proteins.
Article
Chemistry, Physical
Keun-Hong Min, Duk Hyun Lee, Sang-Jun Choi, In-Ho Lee, Junho Seo, Dong Wook Kim, Kyung-Tae Ko, Kenji Watanabe, Takashi Taniguchi, Dong Han Ha, Changyoung Kim, Ji Hoon Shim, Jonghwa Eom, Jun Sung Kim, Suyong Jung
Summary: The authors investigate the tunnelling magnetoresistance in Fe3GeTe2/hBN(WSe2)/Fe3GeTe2 magnetic tunnel junctions and report strong variations including polarization reversals with bias. Using van der Waals heterostructures with two-dimensional magnets, they demonstrate electrically tunable spin injection and detection, as well as modulated and reversed net spin polarization of the injected carriers, leading to changes in tunnelling magnetoresistance. The authors attribute the spin polarization reversals to contributions from high-energy localized spin states in the metallic ferromagnet, which is inaccessible in conventional magnetic junctions.
Article
Integrative & Complementary Medicine
Jong-In Park, In-Ho Lee, Seung-Jea Lee, Ryeo-Won Kwon, Eon-Ah Choo, Hyun-Woo Nam, Jeong-Beom Lee
Summary: The study aimed to determine the effect of music therapy as an alternative treatment for depression in children and adolescents with ADHD by activating serotonin (5-HT) and improving stress coping ability. The study used randomization method and included 36 subjects. The results showed that music therapy had positive effects on neurophysiological and psychological measures, such as increased 5-HT secretion and decreased cortisol expression, blood pressure, and heart rate.
BMC COMPLEMENTARY MEDICINE AND THERAPIES
(2023)
Article
Chemistry, Multidisciplinary
Min-Sik Kim, Dong-Hwan Choi, In-Ho Lee, Wu-Sin Kim, Duhyuk Kwon, Myung-Ho Bae, Ju-Jin Kim
Summary: In this study, researchers report reversible electrical phase transitions in Mo0.67W0.33Se2 (MoWSe) materials, which can be tuned by gate voltage. Electrical current resumes flow in the gate-induced depletion region of the 2H phase when the temperature decreases between 150 K and 200 K. Additionally, the formation of conducting channels and negative differential transconductance were observed. Hysteresis measurements confirm the reversibility of the electrical phase transition behavior.
Article
Chemistry, Analytical
In-Ho Lee, Chang Kyu Byun, Chul Hun Eum, Taewook Kim, Sam-Keun Lee
Summary: A stainless steel vacuum chamber was manufactured to measure VOCs in a large sample, and residual volatile substances were successfully removed under reduced pressure. Using the VC-P&T-GC-MS system, volatile substances in six types of cell phone cases were analyzed and quantitatively assessed, demonstrating the feasibility of this system for large sample analysis in clean room environments.
ANALYTICAL SCIENCE AND TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Young-Pyo Hong, In-June Hwang, Dal-Jae Yun, Dong-Joon Lee, In-Ho Lee
Summary: The paper introduces a novel approach using metasurfaces to achieve high frequency-selectivity, demonstrating stable frequency responses for 5G communication devices and application on antenna arrays.