Article
Chemistry, Multidisciplinary
Yadong Zhang, Xiaoting Sun, Kunpeng Jia, Huaxiang Yin, Kun Luo, Jiahan Yu, Zhenhua Wu
Summary: The study shows that 2D InSe flakes undergo irreversible degradation when exposed to the atmosphere, affecting the performance of field effect transistors. Using a hard shadow mask instead of lithography can prevent material contamination and achieve high-performance InSe FETs. The InSe FET exhibits low hysteresis, high on/off ratio, relatively high I-on, and low subthreshold swing, suggesting potential for high-performance logic devices.
Article
Chemistry, Multidisciplinary
Jovian Delaforce, Masiar Sistani, Roman B. G. Kramer, Minh A. Luong, Nicolas Roch, Walter M. Weber, Martien den Hertog, Eric Robin, Cecile Naud, Alois Lugstein, Olivier Buisson
Summary: Superconductor-semiconductor-superconductor heterostructures with monolithic Al-Ge-Al nanowire featuring high junction transparency Josephson field-effect transistors have been demonstrated in this study to investigate low-temperature transport properties of intrinsic Ge quantum dots, showing tunability of device performance from insulating to supercurrent regimes. This provides a promising architecture for hybrid superconductor-semiconductor devices for the study of Majorana zero modes and components of quantum computing.
ADVANCED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Chuanyu Fu, Yanan Ding, Yixin Zhu, Zhijie Xin, Guoxia Liu, Fukai Shan
Summary: One-dimensional metal-oxide nanowire networks (NNs) have been fabricated for field-effect transistors (FETs) with different Sn/Ga ratios and welded to improve their electrical performance. The FET based on Sn-0.8 Ga-0.2 O NNs/ZrOx displays high stability and performance, providing a foundation for the development of low-cost, high-performance electronic devices.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Chemistry, Analytical
Wen-Pin Hu, Yu-Ming Wu, Cao-An Vu, Wen-Yih Chen
Summary: In this study, three silanization approaches and two types of biorecognition elements were used to investigate the sensing performance on the detection of IL-6. The experimental data revealed that the mixed-SAMs-modified silica surface had superior surface morphology. The aptamer-functionalized SiNW-FET showed a broader detection range and a lower minimum detectable concentration compared to the antibody-functionalized SiNW-FET.
Article
Nanoscience & Nanotechnology
Taekham Kim, Doohyeok Lim, Jaemin Son, Kyoungah Cho, Sangsig Kim
Summary: This study demonstrates reconfigurable n- and p-channel operations in a tri-top-gate field-effect transistor made of a p(+)-i-n(+) silicon nanowire. The device features simple design and high performance, allowing control of both operation modes on the same device.
Review
Chemistry, Analytical
Huiping Li, Dujuan Li, Huiyi Chen, Xiaojie Yue, Kai Fan, Linxi Dong, Gaofeng Wang
Summary: As a new type of one-dimensional semiconductor nanometer material, silicon nanowires (SiNWs) have promising applications in the field of biomedical sensing. SiNWs possess excellent electronic properties that can enhance the detection sensitivity of biosensors. SiNWs combined with field effect transistors (FETs) form a special biosensor with high sensitivity and target selectivity in real-time and label-free. SiNW-FETs have gained more attention in biomedical detection. This review critically examines the progress of SiNW-FETs, focusing on reversible surface modification methods. Additionally, it summarizes the applications of SiNW-FETs in DNA, protein, and microbial detection, while discussing their working principle and technical approaches. The review provides extensive discussion for studying the challenges in the future development of SiNW-FETs.
Article
Nanoscience & Nanotechnology
Felix Winterer, Lisa Sophie Walter, Jakob Lenz, Stefan Seebauer, Yu Tong, Lakshminarayana Polavarapu, Ralf Thomas Weitz
Summary: This study investigates the charge transport properties in cesium lead bromide nanowire films, revealing that despite the presence of deep traps, the field-effect mobility increases significantly when the sample is illuminated, showing phonon-limited transport characteristics. The findings suggest that managing deep traps could lead to optimizing optoelectronic devices such as solar cells even at low light intensities.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xinming Zhuang, Zixu Sa, Jie Zhang, Mingxu Wang, Mingsheng Xu, Fengjing Liu, Kepeng Song, Tao He, Feng Chen, Zai-xing Yang
Summary: High-performance GaSb nanowire field-effect transistors (FETs) with excellent bias-stress stability and synaptic behaviors are achieved by utilizing native GaOx shells through in-situ thermal annealing. The native oxide shell provides enhanced stability and charge retention capability for synaptic behaviors.
Article
Chemistry, Multidisciplinary
Wentao Xu, Lihua Wang, David ChangMo Yang, Amir Hajibabaei, Yeongjun Lee, Cheolmin Park, Tae-Woo Lee, Kwang S. Kim
Summary: The study reports the prediction and observation of supra-binary polarization in a ferroelectric nanowire covered with a semicylindrical gate. Different polarization states can be achieved by controlling the external electric field, leading to exotic current-voltage hysteresis in the ferroelectric-graphene nanoribbon transistor. This discovery suggests new operating mechanisms for ferroelectric devices, allowing for both quaternary-digit information manipulation and traditional bit manipulation in data storage.
ADVANCED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Hao Xue, Ye Shao, Jongwon Yoon, Takhee Lee, Wu Lu
Summary: The low-frequency noise characteristics of ZnO nanowire field-effect transistors (FETs) were studied at temperatures ranging from 10 K to 293 K. The noise mechanisms include carrier number fluctuation (CNF) and mobility fluctuation, varying with temperature. The Hooge's parameter extracted ranged from 10(-3) to 10(-2) in different temperature ranges.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Polymer Science
Ki-Woong Park, Won-Ju Cho
Summary: A random network of indium-gallium-zinc oxide (IGZO) nanowires was fabricated using electrospun-PVP-nanofiber template transfer. Compared to electrospun IGZO nanofibers, the nanofiber template-transferred IGZO nanowires demonstrated higher transmittance, stronger substrate adhesion, superior electrical performance, and operational reliability and uniformity. The proposed IGZO nanowires fabricated by PVP nanofiber template transfer are expected to overcome the limitations of conventional electrospun IGZO nanofibers.
Review
Chemistry, Multidisciplinary
Wenjuan Huang, Yue Zhang, Mengting Song, Bugao Wang, Huayi Hou, Xiaozong Hu, Xiangbai Chen, Tianyou Zhai
Summary: This review provides an overview of the recent progress in encapsulation strategies for 2D materials and discusses methods for improving the ambient stability of these materials. The article also outlines the latest advances in air-stable and high-performance 2D materials-based field effect transistors (FETs) and photodetectors assisted by encapsulation strategies, and suggests future directions for the encapsulation techniques of 2D materials in FETs and photodetectors applications.
CHINESE CHEMICAL LETTERS
(2022)
Article
Multidisciplinary Sciences
Qitao Hu, Si Chen, Paul Solomon, Zhen Zhang
Summary: In this study, sub-10-nm electrical double layer-gated silicon nanowire field-effect transistors (SiNWFETs) are used to directly detect the events of capturing and emitting a single hydrogen ion (H+) at the solid/liquid interface. The ability to achieve ion detection with single charge resolution is demonstrated, along with a systematic investigation of the kinetics of single H+-DB interactions. The SiNWFETs show unprecedented capability for electrical sensing applications, especially in studying the physics of solid/liquid interfacial interactions at the single charge level.
Article
Chemistry, Multidisciplinary
Jiaqi Wei, Fang Liu, Xin Rong, Tao Wang, Liuyun Yang, Renchun Tao, Jing Yang, Liwei Guo, Bo Shen, Xinqiang Wang
Summary: Unintentional nitrogen incorporation in beta-Ga2O3 films grown by plasma-assisted molecular beam epitaxy hinders n-type doping, while a quartz crucible free of nitrogen atoms can overcome this issue, allowing tunable electron concentration in the n-type beta-Ga2O3 films.
Article
Physics, Applied
Siyuan Xu, Lining Liu, Guangming Qu, Xingfei Zhang, Chunyang Jia, Songhao Wu, Yuanxiao Ma, Young Jin Lee, Guodong Wang, Ji-Hyeon Park, Yiyun Zhang, Xiaoyan Yi, Yeliang Wang, Jinmin Li
Summary: In this study, a fin field-effect transistor (FinFET) based on a β-Ga2O3 nanowire with a diameter of approximately 60nm on a Si substrate was demonstrated. The device showed excellent performance with high on/off ratio, low leakage current, and low subthreshold swing. Simulation results were consistent with experimental measurements, and trap-related 1/f noise and 1/f^2 noise were identified through low frequency noise analysis.
APPLIED PHYSICS LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Young-Moo Jo, Yong Kun Jo, Jong-Heun Lee, Ho Won Jang, In-Sung Hwang, Do Joon Yoo
Summary: In order to improve the performance of gas sensors and enhance the quality of life, the use of metal-organic frameworks (MOFs) as sensing materials has been explored. MOFs are known for their high surface area, porosity, and unique surface chemistry, making them promising for gas-sensor innovations. Various types of MOFs have been developed by studying their compositional and morphological dependences, and incorporating catalysts and light activation. Additionally, MOFs have multiple applications as molecular sieves, absorptive filtering layers, and heterogeneous catalysts due to their separation properties and catalytic activity.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Seon Ju Park, Young Kook Moon, Sei-Woong Park, Soo Min Lee, Tae-Hyun Kim, Soo Young Kim, Jong-Heun Lee, Young-Moo Jo
Summary: Real-time breath isoprene sensing provides non-invasive methods for monitoring human metabolism and early diagnosis of cardiovascular diseases. In this work, Co3O4@polyoxometalate yolk-shell structures were derived and showed selective isoprene detection with high chemiresistive response and low detection limit. The sensor's high performance is attributed to electronic sensitization and catalytic promotion effects, and its practical feasibility is demonstrated in smart healthcare applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Engineering, Environmental
Ayeong Byeon, Won Chan Yun, Jong Min Kim, Jae W. Lee
Summary: This review focuses on the application of metal-free heteroatom-doped carbon catalysts in the electrochemical synthesis of hydrogen peroxide through the two-electron oxygen reduction reaction (2e(-) ORR). The electronic properties of carbon can be changed depending on the type of heteroatoms, which significantly affect the ORR catalytic activity. The location of active catalytic sites within the carbon network and the reaction environment, such as pH and electrolyte additives, are also investigated. This review provides fundamental insights into how heteroatoms enhance the electrocatalytic activity of metal-free carbon materials for the 2e(-) ORR.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jeongwoo Yang, Dong Woo Kang, Hodong Kim, Byunghoon Hwang, Jae W. Lee
Summary: The use of a free-standing carbon interlayer in lithium-sulfur batteries shows promise due to its ability to suppress the shuttle effect and provide flexibility. However, the thickness of the interlayer inhibits Li-ion transport. This study addresses this issue by synthesizing a composite with superior pore characteristics and evenly distributed catalytic sites, resulting in improved Li-ion diffusion and redox reaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Byunghoon Hwang, Jeongwoo Yang, Dohyeun Kim, Won Chan Yun, Jae W. Lee
Summary: We designed a membraneless potassium bromide electrochemical capacitor (ML-PBEC) single cell that generates high energy density and reduces self-discharge. Highly porous carbon with a hierarchical structure was synthesized from CO2 gas, and the effect of nitrogen doping on the CO2-derived carbon materials' electrochemical performance was investigated. The ML-PBEC single cell, using the synthesized carbon as electrodes and a Br-/Br3- redox active aqueous electrolyte, achieved enhanced energy density by suppressing the cross-diffusion of soluble bromine molecules through electrostatic interaction between N-doped sites' protons and polybromide anions even without a membrane.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Jeil Park, Wonhyeong Lee, Jae W. W. Lee
Summary: This study explored the impact of dual impeller geometry on droplet size in the S-PVC polymerization process. A borescope method was used to measure droplet size in a biphasic liquid system, and it was found that replacing the upper paddle impeller with a 20-degree pitched paddle increased the Sauter mean diameter by 46.5%. The Sauter mean diameter also increased with larger impeller diameter and blade width. A revised geometrical factor (F) was considered, and a calculated maximum energy dissipation rate was used to establish a correlation for the Sauter mean diameter.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Young Kook Moon, Ju Hyeong Kim, Seong-Yong Jeong, Soo Min Lee, Seon Ju Park, Tae Hyun Kim, Jong-Heun Lee, Yun Chan Kang
Summary: This study presents a novel bilayer ethylene gas sensor consisting of a Pd-doped V2O5-TiO2 yolk-shell catalytic overlayer and an In2O3 sensing layer. The sensor exhibits high sensitivity and selectivity towards ethylene by reforming it into more reactive acetaldehyde and filtering interference gases into non-reactive forms. This unique bilayer sensor has great potential for monitoring fruit ripeness.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Sang Hun Kim, Young Kook Moon, Jong-Heun Lee, Yun Chan Kang, Seong-Yong Jeong
Summary: A chemiresistive-type gas sensor for detecting exhaled hydrogen has been developed, showing excellent selectivity, high response speed, and low detection limit. The sensor holds great potential for disease diagnosis.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Energy & Fuels
Dasol Bae, Yikyeom Kim, Eun Hee Ko, Seung Ju Han, Jae W. Lee, Minkyu Kim, Dohyung Kang
Summary: This study investigated the reaction kinetics and mechanism of CH4 pyrolysis in mixtures of molten MnCl2 with various chlorides, and found that MnCl2-KCl mixture showed the lowest apparent activation energy and the highest crystallinity. This suggests that MnCl2-KCl has unique pathways for methane dehydrogenation and carbon formation.
Article
Green & Sustainable Science & Technology
Wonhyeong Lee, Dong Woo Kang, Yun-Ho Ahn, Jae W. Lee
Summary: In this study, a mixture of hydrate seed solution and liquid phase thermodynamic promoter was introduced to promote the formation of hydrogen hydrates for safe hydrogen storage.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Ki Heum Park, Jae W. Lee, Yutaek Seo
Summary: In this study, a VOC recovery process based on selective condensation was developed. By analyzing the economic benefits, the process efficiency was optimized, and a cascade refrigerant system using carbon dioxide and ammonia was proposed to achieve more efficient and eco-friendly operation of the VOC recovery system.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Energy & Fuels
Donggun Kim, Minyong Lee, Yongbeom Shin, Jeongwoo Lee, Jae W. Lee
Summary: This study presents a novel process for the direct production of diethyl carbonate and ethylene glycol from ethylene carbonate and ethanol through reactive distillation. By integrating reactive distillation systems and eliminating the need for separating the azeotrope mixture, an energy-efficient process is achieved. Two design alternatives are proposed, with both resulting in reductions in energy consumption, cost, and CO2 emissions compared to conventional processes. These alternatives demonstrate their economic viability and effectiveness in CO2 mitigation.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Environmental
Yikyeom Kim, Hyeon Seok Kim, Dohyung Kang, Minkyu Kim, Jae W. Lee
Summary: Chemical looping steam methane reforming (CL-SMR) can produce high-purity hydrogen without additional separation units. The reactivity of LaFeO3 oxygen carrier towards methane can be enhanced by introducing a small amount of iridium. Both particle reduction and oxidation were significantly improved by the presence of iridium, and the preparation pathways of oxygen carriers greatly affected the long-term performance. Although surface iridium species prepared by an impregnation method were severely aggregated during successive redox cycling, B-site incorporation of iridium led to the exsolution of IrOx nanoparticles anchored on the perovskite host and enhanced redox stability, which is essential for the long-term operation of the chemical looping process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Electrochemistry
Ayeong Byeon, Won Chan Yun, Jong Min Kim, Jae W. Lee
Summary: Hydrogen peroxide is widely used in various industries for different purposes, such as water purification and rocket fuels. The conventional method of hydrogen peroxide production consumes a lot of energy and generates chemical waste. Therefore, there is a growing interest in the electrochemical production method using non-precious metal catalysts, such as transition metals and heteroatoms, for eco-friendly and low-energy synthesis. This review focuses on the modification of atomic configuration to enhance the catalytic activity of non-precious metal catalysts for the two-electron oxygen reduction reaction (ORR).
Article
Chemistry, Multidisciplinary
Jeil Park, Wonhyeong Lee, Jae W. W. Lee
Summary: This study investigated the impact of dual impeller geometry on droplet size in S-PVC polymerization process and proposed a correlation equation to estimate droplet size with a certain margin of error, aiding in predicting the normality of the polymerization reaction under specific impeller geometry.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
