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RISS 인기검색어
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- 저자 : Jinyong Lin (검색결과 4 건)
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Controlled Layer-by-Layer Etching of MoS<sub>2</sub>
Lin, TaiZhe,Kang, BaoTao,Jeon, MinHwan,Huffman, Craig,Jeon, JeaHoo,Lee, SungJoo,Han, Wei,Lee, JinYong,Lee, SeHan,Yeom, GeunYoung,Kim, KyongNam American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.29
<P>Two-dimensional (2D) metal dichalcogenides like molybdenum disulfide (MoS<SUB>2</SUB>) may provide a pathway to high-mobility channel materials that are needed for beyond-complementary metal-oxide-semiconductor (CMOS) devices. Controlling the thickness of these materials at the atomic level will be a key factor in the future development of MoS<SUB>2</SUB> devices. In this study, we propose a layer-by-layer removal of MoS<SUB>2</SUB> using the atomic layer etching (ALET) that is composed of the cyclic processing of chlorine (Cl)-radical adsorption and argon (Ar)<SUP>+</SUP> ion-beam desorption. MoS<SUB>2</SUB> etching was not observed with only the Cl-radical adsorption or low-energy (<20 eV) Ar<SUP>+</SUP> ion-beam desorption steps; however, the use of sequential etching that is composed of the Cl-radical adsorption step and a subsequent Ar<SUP>+</SUP> ion-beam desorption step resulted in the complete etching of one monolayer of MoS<SUB>2</SUB>. Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) indicated the removal of one monolayer of MoS<SUB>2</SUB> with each ALET cycle; therefore, the number of MoS<SUB>2</SUB> layers could be precisely controlled by using this cyclical etch method. In addition, no noticeable damage or etch residue was observed on the exposed MoS<SUB>2</SUB>.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2015/aamick.2015.7.issue-29/acsami.5b03491/production/images/medium/am-2015-03491k_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am5b03491'>ACS Electronic Supporting Info</A></P>
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( Kok-ann Gwee ),( Paul Bergmans ),( Jinyong Kim ),( Bogdana Coudsy ),( Angelia Sim ),( Minhu Chen ),( Lin Lin ),( Xiaohua Hou ),( Huahong Wang ),( Khean-lee Goh ),( John A Pangilinan ),( Nayoung Kim 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2017 Journal of Neurogastroenterology and Motility (JNM Vol.23 No.2
Background/Aims There is a need for a simple and practical tool adapted for the diagnosis of chronic constipation (CC) in the Asian population. This study compared the Asian Neurogastroenterology and Motility Association (ANMA) CC tool and Rome III criteria for the diagnosis of CC in Asian subjects. Methods This multicenter, cross-sectional study included subjects presenting at outpatient gastrointestinal clinics across Asia. Subjects with CC alert symptoms completed a combination Diagnosis Questionnaire to obtain a diagnosis based on 4 different diagnostic methods: self-defined, investigator`s judgment, ANMA CC tool, and Rome III criteria. The primary endpoint was the level of agreement/ disagreement between the ANMA CC diagnostic tool and Rome III criteria for the diagnosis of CC. Results The primary analysis comprised of 449 subjects, 414 of whom had a positive diagnosis according to the ANMA CC tool. Rome III positive/ANMA positive and Rome III negative/ANMA negative diagnoses were reported in 76.8% and 7.8% of subjects, respectively, resulting in an overall percentage agreement of 84.6% between the 2 diagnostic methods. The overall percentage disagreement between these 2 diagnostic methods was 15.4%. A higher level of agreement was seen between the ANMA CC tool and self-defined (374 subjects [90.3%]) or investigator`s judgment criteria (388 subjects [93.7%]) compared with the Rome III criteria. Conclusion This study demonstrates that the ANMA CC tool can be a useful for Asian patients with CC. (J Neurogastroenterol Motil 2017;23:262-272)
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Multi-RIS Aided 3D Secure Precise Wireless Transmission
Tong Shen,Wenlong Cai,Yan Lin,Shuo Zhang,Jinyong Lin,Feng Shu,Jiangzhou Wang 한국통신학회 2022 Journal of communications and networks Vol.24 No.5
In this paper, multiple reconfigurable intelligent surfaces (RIS) aided secure precise wireless transmission (SPWT) schemes are proposed in the three-dimensional (3D) wire- less communication scenario. Unavailable direct path channels from transmitter to receivers are considered when the di- rect paths are obstructed by obstacles. Then, multiple RISs are utilized to achieve SPWT through the reflection path among transmitter, RISs and receivers in order to enhance the communication performance and energy efficiency simulta- neously. First, a maximum-signal-to-interference-and-noise ratio (MSINR) scheme is proposed in a single user scenario. Then, the multi-user scenario is considered where the illegitimate users are regarded as eavesdroppers. A maximum-secrecy-rate (MSR) scheme and a maximum-signal-to-leakage-and-noise ratio (MSLNR) are proposed. The former achieves a better secrecy rate (SR) performance but incurs a higher complexity. The latter has a lower complexity than the MSR scheme with an SR performance loss. Simulation results show that both single- user scheme and multi-user scheme can achieve SPWT which transmits confidential message precisely to location of desired users. Moreover, MSLNR scheme has a lower complexity than the MSR scheme, while the SR performance is close to that of the MSR scheme.
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Jin Yong,Wang Zhilin,Zhang Zhenxin,Lin Bo,Ge Zhengjun,You Qidong,Chen Hao,Liu Xiliang,Xu Chenghao,Gao Shuaiqiang,Wu Yi,Abro Zafar 한국자원공학회 2023 Geosystem engineering Vol.26 No.4
CO2 flooding is a significant technology for oil recovery, to reveal the microcosmic mechanism of CO2 flooding, CO2 slim tube experiments, long core CO2 flooding experiments, gas chromatography analysis experiments, and numerical simulations were carried out. The results show that the miscibility increase can improve the effect of dissolution and diffusion in the CO2-crude oil system, easing the CO2 finger entry phenomena, and delaying gas breakthrough time. Besides, the CO2 -crude oil interaction is enhanced by increasing the pressure difference between the injection well and the production well, which improves the oil recovery of CO2 flooding. Besides, CO2 carries the light and medium components (C4 ~ 25) forward to cross the first miscible zone, which makes the CO2-crude oil system form double miscible zones. This study reveals the rule of CO2 front and light components front under different miscibility degrees of CO2 flooding from the microscopic perspective and deepens the theory of CO2 flooding in low-permeability sandstone reservoirs.
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