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1. Realization and transport investigation of a single layer-twisted bilayer graphene junction

Author:
Rui, Dingran; Sun, Luzhao; Kang, N.; Li, Jiayu; Lin, Li; Peng, Hailin; Liu, Zhongfan; Xu, H.Q.
Source:
Carbon 2020 v.163 pp. 105-112
ISSN:
0008-6223
Subject:
vapors,   etc   ; graphene; temperature;     Show all 3 Subjects
Abstract:
... We report on realization and low-temperature transport study of a single layer graphene (SLG)-twisted bilayer graphene (tBLG) junction device. The SLG-tBLG junction in the device is grown by chemical vapor deposition and the device is fabricated in a Hall-bar configuration. The longitudinal resistances across the SLG-tBLG junction (cross-junction resistances) on the two sides of the Hall bar are m ...
DOI:
10.1016/j.carbon.2020.03.006

2. Effects of critical temperature, critical pressure and dryness of working fluids on the performance of the transcritical organic rankine cycle

Author:
Wang, Mingtao; Zhang, Juan; Liu, Qiyi; Tan, Luzhi
Source:
Energy 2020 v.202 pp. 117663
ISSN:
0360-5442
Subject:
vapors,   etc   ; heat; temperature;     Show all 3 Subjects
Abstract:
... Thermodynamic properties of working fluids have significant effects on the system performance of the transcritical organic Rankine cycle, and the optimal working fluid is related to the heat source temperature. In this paper, both separate and combined effects of the critical temperature (Tcᵣᵢ), critical pressure (Pcᵣᵢ) and dryness (ξ) of working fluids on the performance of TORCs were investigate ...
DOI:
10.1016/j.energy.2020.117663

3. Numerical study on the effect of the supersaturated vapor on the performance of a gas cyclone

Author:
Jin, Ruizhi; Keshavarzian, Erfan; Dong, Kejun; Dong, Sijie; Wang, Bo; Kwok, Kenny; Zhao, Ming
Source:
Powder technology 2020 v.366 pp. 324-336
ISSN:
0032-5910
Subject:
vapors,   etc   ; models; wastes;     Show all 3 Subjects
Abstract:
... Gas cyclones are widely used to purify waste gases but are not effective in collecting fine particles. The cloud-air-purifying (CAP) technology was recently developed to overcome this deficiency by unitizing the supersaturated vapor in the cyclone. This paper presents a CFD study on the CAP cyclone. The condensational growth of particles is implemented in the CFD model. Its positive effect on the ...
DOI:
10.1016/j.powtec.2019.09.096

4. Invisible Inks for Secrecy and Anticounterfeiting: From Single to Double-encryption by Hydrochromic Molecules

Author:
Zhao, Haiquan; Qin, Xingchen; Zhao, Lei; Dong, Shumin; Gu, Lianghong; Sun, Wen; Wang, Dongsheng; Zheng, Yonghao
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8952-8960
ISSN:
1944-8252
Subject:
vapors,   etc   ; color; heat;     Show all 3 Subjects
Abstract:
... Secret information recorded by traditional single-encrypted invisible inks is easily cracked because the inks can switch only between “NONE” and “TRUTH”. Developing double-encrypted systems makes the information reversibly switchable between “FALSE” and “TRUTH”, which is helpful to ensure the safety of the secret information during transport. Here, we prepared heat-developed invisible inks by hydr ...
DOI:
10.1021/acsami.0c00462

5. The vapor pressure of Se and SeO2 measurement using thermogravimetric analysis

Author:
Xu, Wenting; Song, Qiang; Song, Guochang; Yao, Qiang
Source:
Thermochimica acta 2020 v.683 pp. 178480
ISSN:
0040-6031
Subject:
vapor pressure; vapors,   etc   ; equations; selenium; temperature; thermogravimetry; uncertainty;     Show all 7 Subjects
Abstract:
... The vapor pressure data of Se and SeO₂ in low temperature range are essential for the study of emission and migration of selenium from stationary sources. The vapor pressure of SeO₂ at 353.2–473.2 K was measured by thermogravimetric analysis, and the corresponding pressure was 0.026–319.2 Pa. The vapor pressure of Se at 423.2–573.2 K was measured, and the corresponding pressure was 0.007–80.9 Pa. ...
DOI:
10.1016/j.tca.2019.178480

6. Parametric study of absorption refrigeration with vapor compression refrigeration cycle using wet, isentropic and azeotropic working fluids: Conventional and advanced exergy approach

Author:
Ustaoglu, Abid
Source:
Energy 2020 v.201 pp. 117491
ISSN:
0360-5442
Subject:
vapors,   etc   ; absorption; exergy; refrigeration; temperature;     Show all 5 Subjects
Abstract:
... Advanced exergy analysis was carried out for absorption-compression refrigeration-cycles with a working fluid selection and parametric analysis. The exergy-destruction was split into endogenous-exogenous and avoidable-unavoidable-parts to reveal the interdependency within the components and determine the improvement potential. The results show that the largest exergy-destruction occurs in the gene ...
DOI:
10.1016/j.energy.2020.117491

7. Substrate effects on the CVD growth of MoS2 and WS2

Author:
Yin, Hang; Zhang, Xudong; Lu, Jiangwei; Geng, Xuemin; Wan, Yanfen; Wu, Mingzai; Yang, Peng
Source:
Journal of materials science 2020 v.55 no.3 pp. 990-996
ISSN:
0022-2461
Subject:
vapors,   etc   ; molybdenum disulfide; optical properties;     Show all 3 Subjects
Abstract:
... Chemical vapor deposition (CVD)-grown 2D materials like MoS₂ and WS₂ have been widely used for research and application. Here, we study substrates’ effects on CVD-grown MoS₂ and WS₂. The morphology, crystalline quality and optical properties have been modified while changing substrates, which can be derived from lattice matching between 2D materials and substrate, defect/impurities on the interfac ...
DOI:
10.1007/s10853-019-03993-9

8. Design and performance analysis of a novel Transcritical Regenerative Series Two stage Organic Rankine Cycle for dual source waste heat recovery

Author:
Surendran, Anandu; Seshadri, Satyanarayanan
Source:
Energy 2020 v.203 pp. 117800
ISSN:
0360-5442
Subject:
vapors,   etc   ; evaporation; exergy; temperature; waste heat recovery;     Show all 5 Subjects
Abstract:
... A Transcritical Regenerative Series Two stage Organic Rankine Cycle (TR-STORC) is proposed to improve the efficiency of existing Series Two stage ORC (STORC) architecture by combining supercritical heating in the high pressure (HP) stage and partial evaporation with regeneration in the low pressure (LP) stage. Exhaust gas and jacket water from a stationary IC engine is used as the primary and seco ...
DOI:
10.1016/j.energy.2020.117800

9. Production of high-strength and low-gasification reactivity coke from low-grade carbonaceous materials by vapor deposition of tar

Author:
Mochizuki, Yuuki; Ma, Jun; Kubota, Yukihiro; Uebo, Kazuya; Tsubouchi, Naoto
Source:
Fuel processing technology 2020 v.203 pp. 106384
ISSN:
0378-3820
Subject:
vapors,   etc   ; carbon; gasification; lignite; pyrolysis; temperature;     Show all 6 Subjects
Abstract:
... Carbon/carbon composites were prepared from pyrolyzed-chars of lignite or low-strength coke (drum index of DI¹⁵⁰₆ = 52) and a coke-oven-gas tar through a gaseous-tar vapor deposition method to investigate the possibility of producing high-strength coke from low-grade coal or coke. The optimum vapor deposition temperature was examined under tar pyrolysis temperature of 700 °C and holding time of 30 ...
DOI:
10.1016/j.fuproc.2020.106384

10. One-step process for dual-scale ratchets with enhanced mobility of Leidenfrost droplets

Author:
Liu, Cong; Sun, Kuan; Lu, Chenguang; Su, Junpeng; Han, Libao; Wang, Zuankai; Liu, Yahua
Source:
Journal of colloid and interface science 2020 v.569 pp. 229-234
ISSN:
0021-9797
Subject:
vapors,   etc   ; droplets; electric discharges; roughness; steel; temperature;     Show all 6 Subjects
Abstract:
... Droplet depositing onto hot surfaces above the so-called Leidenfrost temperature will float on a cushion of its own vapor. The vapor flow below the drop could be rectified by asymmetric surface textures, resulting the self-propelled droplet motion. Asymmetric structures like ratchets are used to rectify Leidenfrost droplet movement. Hence, it is possible to enhance the droplet mobility using surfa ...
DOI:
10.1016/j.jcis.2020.02.076

11. An examination of the building pressure cycling technique as a tool in vapor intrusion investigations with analytical simulations

Author:
Yao, Yijun; Zuo, Jianping; Luo, Jian; Chen, Qiang; Ström, Jonathan; Suuberg, Eric
Source:
Journal of hazardous materials 2020 v.389 pp. 121915
ISSN:
0304-3894
Subject:
vapors,   etc   ; analytical methods; polluted soils; soil air;     Show all 4 Subjects
Abstract:
... The building pressure cycling (BPC) technique has been developed and applied by vapor intrusion (VI) site investigators to obtain estimates of reasonable maximum exposures and to identify possible background sources of contaminant vapors. This method assumes that by application of consistent indoor depressurization one can increase the average contaminated soil gas entry rate into a building of in ...
DOI:
10.1016/j.jhazmat.2019.121915
PubMed:
31882341
PubMed Central:
PMC7082193

12. Synthesis of isolated carbon nanowalls via high-voltage nanosecond pulses in conjunction with CH4/H2 plasma enhanced chemical vapor deposition

Author:
Ichikawa, Tomonori; Shimizu, Naohiro; Ishikawa, Kenji; Hiramatsu, Mineo; Hori, Masaru
Source:
Carbon 2020 v.161 pp. 403-412
ISSN:
0008-6223
Subject:
vapors,   etc   ; adsorption; energy; graphene; hydrogen; methane;     Show all 6 Subjects
Abstract:
... Carbon nanowalls (CNWs) are vertically standing, interconnecting flake- or wall-like collections of graphene sheets. In the present work, this material was synthesized by applying precisely controlled high-voltage nanosecond pulses to a substrate using an inductor energy storage circuit in a radical-injection plasma-enhanced chemical vapor deposition system, employing a CH₄/H₂ plasma. The resultin ...
DOI:
10.1016/j.carbon.2020.01.064

13. From phosphorus nanorods/C to yolk–shell P@hollow C for potassium-ion batteries: high capacity with stable cycling performance

Author:
Huang, Xingkang; Sui, Xiaoyu; Ji, Weixiao; Wang, Yale; Qu, Deyang; Chen, Junhong
Source:
Journal of materials chemistry A 2020 v.8 no.16 pp. 7641-7646
ISSN:
2050-7496
Subject:
vapors,   etc   ; batteries; nanorods; phosphorus; pollution load;     Show all 5 Subjects
Abstract:
... A thin hollow C (HC) was synthesized to host a high phosphorus (P) loading of 75 wt%, forming a P@HC yolk/shell structure, which delivered a reversible capacity of 841 mA h g⁻¹, with excellent rate capability and stable cycling performance. P vapor concentration was found to be critical to the formation of P@HC or the P nanorod (PNR)/C composite. At a very high concentration of P vapor, well-cryst ...
DOI:
10.1039/d0ta01576h

14. Advanced exergy analyses of modified ethane recovery processes with different refrigeration cycles

Author:
Zhang, Shijian; Jing, Jiaqiang; Jiang, Hong; Qin, Min; Chen, Di; Chen, Chuan
Source:
Journal of cleaner production 2020 v.253 pp. 119982
ISSN:
0959-6526
Subject:
vapors,   etc   ; cold; compressors; ethane; exergy; refrigeration; temperature;     Show all 7 Subjects
Abstract:
... This paper presents three modified processes with different refrigeration cycles based on the recycle split vapor (RSV) process. Advanced exergy analysis is adopted to evaluate the exergy destruction forms of each component and compare exergy destruction differences among the three complex ethane recovery processes to reflect the interaction between components and identify the improvement potentia ...
DOI:
10.1016/j.jclepro.2020.119982

15. Simulation of three-stage operating temperature for supersaturation water-based condensational growth tube

Author:
Bian, Jiejie; Gui, Huaqiao; Xie, Zhibo; Yu, Tongzhu; Wei, Xiuli; Wang, Wenyu; Liu, Jianguo
Source:
Journal of environmental sciences (China) 2020 v.90 pp. 275-285
ISSN:
1001-0742
Subject:
water vapor,   etc   ; nanoparticles; particle size distribution; temperature;     Show all 4 Subjects
Abstract:
... In order to realize accurate dynamic control of supersaturation and to study condensation growth characteristics of nanoparticles through different levels of supersaturation, a series of parametric analyses and systematic comparisons between two-stage and three-stage operating temperature designs were simulated with COMSOL Multiphysics. The simulation results showed that the three-stage operating ...
DOI:
10.1016/j.jes.2019.12.007

16. Realization of Ultrahigh Quality InGaN Platelets to be Used as Relaxed Templates for Red Micro-LEDs

Author:
Bi, Zhaoxia; Lu, Taiping; Colvin, Jovana; Sjögren, Elis; Vainorius, Neimantas; Gustafsson, Anders; Johansson, Jonas; Timm, Rainer; Lenrick, Filip; Wallenberg, Reine; Monemar, Bo; Samuelson, Lars
Source:
ACS applied materials & interfaces 2020 v.12 no.15 pp. 17845-17851
ISSN:
1944-8252
Subject:
vapors,   etc   ; gallium; indium; light emitting diodes; nitrides;     Show all 5 Subjects
Abstract:
... In this work, arrays of predominantly relaxed InGaN platelets with indium contents of up to 18%, free from dislocations and offering a smooth top c-plane, are presented. The InGaN platelets are grown by metal–organic vapor phase epitaxy on a dome-like InGaN surface formed by chemical mechanical polishing of InGaN pyramids defined by 6 equivalent {101̅1} planes. The dome-like surface is flattened d ...
DOI:
10.1021/acsami.0c00951

17. Effective Control of Vapor Recompression-Assisted Dividing Wall Column with a Middle Partition

Author:
Gao, Lianrui; Xu, Lianghua; Yin, Xiaohong; Xia, Ming; Yuan, Xigang
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.13 pp. 6112-6122
ISSN:
1520-5045
Subject:
vapors,   etc   ; distillation; energy efficiency; process design; temperature;     Show all 5 Subjects
Abstract:
... Vapor recompression-assisted dividing wall columns (VRC-DWCs) with a middle partition have been shown to have a higher energy efficiency compared to conventional DWCs. However, the controllability of this highly integrated process remains as a challenging issue since all of the benefits of a VRC-DWC are reasonable only under good dynamic controllability. Compared to the control of the vapor recomp ...
DOI:
10.1021/acs.iecr.9b06644

18. Bottom-up synthesis of graphene via hydrothermal cathodic reduction

Author:
Tomai, Takaaki; Nakayasu, Yuta; Okamura, Yusuke; Ishiguro, Shunichi; Tamura, Naoki; Katahira, Shusuke; Honma, Itaru
Source:
Carbon 2020 v.158 pp. 131-136
ISSN:
0008-6223
Subject:
vapors,   etc   ; cathodes; electrochemistry; graphene; silicon carbide; temperature;     Show all 6 Subjects
Abstract:
... To date, considerable effort had been devoted to developing a bottom-up synthesis method of graphene, but the methods have been mostly limited to chemical vapor deposition and SiC surface decomposition. Herein, we demonstrated the bottom-up synthesis of graphene via hydrothermal cathodic reduction. In the developed process, the hydrothermal conditions were tuned to enhance the electrochemical reac ...
DOI:
10.1016/j.carbon.2019.11.052

19. Discrimination of Various Amine Vapors by a Triemissive Metal-Organic Framework Composite via the Combination of a Three-Dimensional Ratiometric Approach and a Confinement-Induced Enhancement Effect

Author:
Ni, Jun; Li, Mei-Yu; Liu, Zhen; Zhao, He; Zhang, Jian-Jun; Liu, Shu-Qin; Chen, Jun; Duan, Chun-Ying; Chen, Li-Yong; Song, Xue-Dan
Source:
ACS applied materials & interfaces 2020 v.12 no.10 pp. 12043-12053
ISSN:
1944-8252
Subject:
vapors,   etc   ; amines; ammonia; cations; coordination polymers; luminescence;     Show all 6 Subjects
Abstract:
... Multiemissive sensors are being actively pursued, because of their ratiometric luminescent detection capabilities, which demonstrates better sensitivity and selectivity than conventional single-emission sensors. Herein, we present a trichromatic white-light-emitting metal–organic framework (MOF) composite (Z3) by simultaneously incorporating red/green-emitting Pt/Ru complex cations into porous blu ...
DOI:
10.1021/acsami.9b22130

20. Experimental investigation of the effect of magnetic field on vapour absorption with LiBr–H2O nanofluid

Author:
Wu, Shenyi; Rincon Ortiz, Camilo
Source:
Energy 2020 v.193 pp. 116640
ISSN:
0360-5442
Subject:
vapors,   etc   ; absorption; magnetic fields; nanofluids; nanoparticles;     Show all 5 Subjects
Abstract:
... This work presents a new approach for further research in enhancing vapour absorption rate and understanding the enhancement mechanism in the process. The experimental study explored enhancing vapour absorption from using an external magnetic field to induce slip movement of nanoparticles in a nanofluid. The experiment were carried out in an adiabatic falling film absorber with a mixture of LiBr–H ...
DOI:
10.1016/j.energy.2019.116640