PubAg

Main content area

You searched for: Subject "absorption" Remove constraint Subject: "absorption"
Start Over

Search

51,471  Search Results

« Previous | 1 - 20 of 51,471 |
Number of results to display per page

Search Results

1. Tailoring MOF-based materials to tune electromagnetic property for great microwave absorbers and devices

Author:
Shu, Jin-Cheng; Yang, Xin-Yu; Zhang, Xin-Ran; Huang, Xiao-Yuan; Cao, Mao-Sheng; Li, Lin; Yang, Hui-Jing; Cao, Wen-Qiang
Source:
Carbon 2020 v.162 pp. 157-171
ISSN:
0008-6223
Subject:
absorption,   etc   ; coordination polymers; microstructure;     Show all 3 Subjects
Abstract:
... Metal-organic framework (MOF) materials have highly sought after in electromagnetic materials and functional devices, due to the unique three-dimensional structure and electronic state. Herein, the tailoring strategy of MOF materials, including MOF precursors and carbonized derivatives, is combed for high-efficiency microwave absorbers. The design idea from microstructure to electromagnetic respon ...
DOI:
10.1016/j.carbon.2020.02.047

2. Third- and Fifth-Order Nonlinear Optical Response of a TICT/Stilbene Hybrid Chromophore

Author:
Lou, Alexander J.-T.; Benis, Sepehr; Gao, Munan; Baev, Alexander; Kim, David; Van Stryland, Eric W.; Hagan, David J.; Marks, Tobin J.
Source:
Journal of physical chemistry 2020 v.124 no.9 pp. 5363-5370
ISSN:
1932-7455
Subject:
absorption,   etc   ; methylene chloride; stilbenes;     Show all 3 Subjects
Abstract:
... Twisted intramolecular charge transfer (TICT) chromophores exhibit a promising third-order nonlinear optical (NLO) response, γ, which is potentially useful for all-optical switching. Here we explore the third- and fifth-order NLO response of a newly synthesized chromophore, TMC-3′, which incorporates both stilbene and TICT motifs with optical function. Solution Z-scan measurements in CH₂Cl₂ reveal ...
DOI:
10.1021/acs.jpcc.9b11735

3. Exciton-Polariton Properties in Planar Microcavity of Millimeter-Sized Two-Dimensional Perovskite Sheet

Author:
Zhang, Xiaoli; Shi, Huafeng; Dai, Haitao; Zhang, Xinhai; Sun, Xiao Wei; Zhang, Zhaoyu
Source:
ACS applied materials & interfaces 2020 v.12 no.4 pp. 5081-5089
ISSN:
1944-8252
Subject:
absorption,   etc   ; emissions; energy; photons;     Show all 4 Subjects
Abstract:
... In this work, the self-organized two-dimensional (2D) perovskite crystal sheet was synthesized for exciton-polariton studies. The layered 2D perovskite sheets naturally form Fabry–Pérot (F–P) optical cavities and exhibit evident cavity polariton modes. In the region of F–P cavity polariton modes, an exciton-polariton is formed by the superposition of strongly coupled exciton and photon states and ...
DOI:
10.1021/acsami.9b19968

4. A new twist in graphene research: Twisted graphene

Author:
Mogera, Umesha; Kulkarni, Giridhar U.
Source:
Carbon 2020 v.156 pp. 470-487
ISSN:
0008-6223
Subject:
absorption,   etc   ; graphene; superconductivity;     Show all 3 Subjects
Abstract:
... Graphene is perhaps the most studied material around the globe in recent years. It has served as a classic example of 2D material not just because of the historical reasons, but importantly, due to distinctly observable dimensional crossover in it, from 2D to 3D, via Bernal stacked (AB) bilayer to multilayer finally culminating in graphite. The interlayer interactions that are thus responsible, ho ...
DOI:
10.1016/j.carbon.2019.09.053

5. Enhanced wideband microwave absorption of hollow carbon nanowires derived from a template of Al4C3@C nanowires

Author:
Hua, An; Li, Yong; Pan, Desheng; Luan, Jian; Wang, Yu; He, Jun; Tang, Shufang; Geng, Dianyu; Ma, Song; Liu, Wei; Zhang, Zhidong
Source:
Carbon 2020 v.161 pp. 252-258
ISSN:
0008-6223
Subject:
absorption,   etc   ; carbon nanotubes; graphene; nanowires;     Show all 4 Subjects
Abstract:
... The hollow carbon nanowires with large number of surface defects and specific surface have been prepared by de-alloying Al₄C₃@C nanowires. Compared to the graphene-based or carbon-nanotube-based electromagnetic wave-absorbing composites reported previously, the hollow carbon nanowires achieve enhanced wideband microwave absorption due to enhanced impedance match and increased electric dipoles, whi ...
DOI:
10.1016/j.carbon.2020.01.081

6. New Insights on the Formation Process and Thermodynamics of the α-Phase PdH(D)ₓ through Direct Enthalpy Measurement of H(D) Dissolution

Author:
Dekura, Shun; Akiba, Hiroshi; Yamamuro, Osamu; Kobayashi, Hirokazu; Maesato, Mitsuhiko; Kitagawa, Hiroshi
Source:
Journal of physical chemistry 2020 v.124 no.16 pp. 8663-8668
ISSN:
1932-7455
Subject:
absorption,   etc   ; calorimeters; enthalpy; hydrogen; palladium;     Show all 5 Subjects
Abstract:
... The palladium (Pd)–hydrogen (H) system is one of the most famous hydrogen-storage systems. However, the formation process and thermodynamics at the initial stage of hydrogen storage in Pd remain unclear. Here we report the formation process and thermodynamics of the α-phase PdH(D)ₓ (x < 0.03) for the first time through direct measurements of the enthalpy of H and D dissolution, −ΔₛₒₗH, at around 3 ...
DOI:
10.1021/acs.jpcc.0c01817

7. Determination of Platinum Group Elements in Geological Samples by Inductively Coupled Plasma Mass Spectrometry: Possibilities and Limitations

Author:
Grebneva-Balyuk, O. N.; Kubrakova, I. V.
Source:
Journal of analytical chemistry 2020 v.75 no.3 pp. 275-285
ISSN:
1061-9348
Subject:
atomic absorption spectrometry,   etc   ; gold; platinum;     Show all 3 Subjects
Abstract:
... Published data on approaches used to suppress/eliminate interferences of various origins in determining platinum group elements and gold in geological samples by inductively coupled plasma mass spectrometry are generalized and analyzed. ...
DOI:
10.1134/S1061934820030065

8. Photoinduced Charge Transfer in Donor-Bridge-Acceptor in One- and Two-photon Absorption: Sequential and Superexchange Mechanisms

Author:
Mu, Xijiao; Wang, Xinxin; Quan, Jun; Sun, Mengtao
Source:
Journal of physical chemistry 2020 v.124 no.9 pp. 4968-4981
ISSN:
1932-7455
Subject:
absorption,   etc   ; fullerene; polymerization; porphyrins; thiophene;     Show all 5 Subjects
Abstract:
... In this work, the one- (OPA) and two-photon absorption (TPA) and transition characteristics of the porphyrin and fullerene donor–acceptor systems linked by thiophene oligomers are investigated theoretically. In the study of the transition characteristics of OPA and TPA, a combination of 2D and 3D visualization methods is used. During the OPA and TPA transitions of this D–A system, there is both su ...
DOI:
10.1021/acs.jpcc.9b09995

9. Nanochemical Investigation of Degradation in Organic–Inorganic Hybrid Perovskite Films Using Infrared Nanoscopy

Author:
Yu, Hyang Mi; Oh, Hye Min; Park, Dae Young; Jeong, Mun Seok
Source:
Journal of physical chemistry 2020 v.124 no.6 pp. 3915-3922
ISSN:
1932-7455
Subject:
absorption,   etc   ; oxygen; photoluminescence; spectroscopy; vibration;     Show all 5 Subjects
Abstract:
... The degradation of organic–inorganic hybrid perovskite (OHP) films is a crucial issue in OHP optoelectronics. Herein, we investigate the degradation process of OHP films by simultaneous measurement of topography and infrared absorption mapping images using photothermal induced resonance spectroscopy. By tracking the intensity of molecular vibration, we found that oxygen and moisture are easily att ...
DOI:
10.1021/acs.jpcc.0c00143

10. External Electric Field-Dependent Photoinduced Charge Transfer in a Donor–Acceptor System in Two-Photon Absorption

Author:
Mu, Xijiao; Zong, Huan; Zhu, Lilong; Sun, Mengtao
Source:
Journal of physical chemistry 2020 v.124 no.4 pp. 2319-2332
ISSN:
1932-7455
Subject:
absorption,   etc   ; electric field; optical properties;     Show all 3 Subjects
Abstract:
... In this paper, we theoretically investigated external electric field-dependent photoinduced charge transfer (CT) in a donor–acceptor (D-A) system in two-photon absorption (TPA) where PCDTBT and PC70BM were selected as the D and A, respectively. Using our developed visualization methods, we can directly observe the dynamic processes of photoinduced CT in each step in different transition channels i ...
DOI:
10.1021/acs.jpcc.9b10086

11. One-pot fabrication of reusable hybrid sorbents for quick removal of oils from wastewater

Author:
Kizil, Soner; Bulbul Sonmez, Hayal
Source:
Journal of environmental management 2020 v.261 pp. 109911
ISSN:
0301-4797
Subject:
absorption,   etc   ; oils; solvents; sorbents; wastewater; water resources;     Show all 6 Subjects
Abstract:
... The leaking of harmful organic liquids into water resources has had hazardous impacts on living organisms. Herein, we demonstrated the fabrication of hybrid sorbents using s-PPG and organosilane cross-linker. The final product exhibited high, quick absorption capacity, great reusability and excellent oil separation performance from wastewater. They also selectively absorb different oils from the b ...
DOI:
10.1016/j.jenvman.2019.109911

12. Structure-switchable mesoporous carbon hollow sphere framework toward sensitive microwave response

Author:
Cheng, Yan; Zhao, Huanqin; Zhao, Yue; Cao, Jieming; Zheng, Jing; Ji, Guangbin
Source:
Carbon 2020 v.161 pp. 870-879
ISSN:
0008-6223
Subject:
absorption,   etc   ; carbon; microstructure; polymerization; porous media; silica;     Show all 6 Subjects
Abstract:
... Mesoporous carbon hollow sphere (MCHS) is one of the most significant functional materials in various fields. Unfortunately, systematically regulating microstructure of MHCS has been rarely investigated so far. In this work, using one unique simultaneous-hydrolyzation-polymerization process, we are able to precisely control the morphology configurations of MCHS, including its shell thickness and i ...
DOI:
10.1016/j.carbon.2020.02.011

13. Hybrid zeolite imidazolate framework derived N-implanted carbon polyhedrons with tunable heterogeneous interfaces for strong wideband microwave attenuation

Author:
Liu, Panbo; Gao, Sai; Huang, Wenhuan; Ren, Juan; Yu, Danyang; He, Wenjuan
Source:
Carbon 2020 v.159 pp. 83-93
ISSN:
0008-6223
Subject:
absorption,   etc   ; carbon; chemical composition; nanoparticles; pyrolysis; zeolites;     Show all 6 Subjects
Abstract:
... Rational manipulation of zeolite imidazolate framework derived carbon microwave absorbers is highly significant, but still remains a challenge. Herein, three kinds of multi-metallic doped N-implanted carbon polyhedrons (NCP), named Mo-NCP, W-NCP and MoW-NCP, with tailored composition and unique structure derived from the pyrolysis of hybrid zeolite imidazolate framework (HZIF) precursors have been ...
DOI:
10.1016/j.carbon.2019.12.021

14. Outstanding comprehensive performance versus facile synthesis: Constructing core and shell-interchangeable nanocomposites as microwave absorber

Author:
Li, Zihan; Yang, Erqi; Qi, Xiaosi; Xie, Ren; Jing, Tao; Qin, Shuijie; Deng, Chaoyong; Zhong, Wei
Source:
Journal of colloid and interface science 2020 v.565 pp. 227-238
ISSN:
0021-9797
Subject:
absorption,   etc   ; iron oxides; molybdenum disulfide; nanocomposites; temperature;     Show all 5 Subjects
Abstract:
... It is still a great challenge to develop high-performance microwave absorption materials (MAMs). Herein, we first proved the excellent synergistic effect of Fe₃O₄/MoS₂ heterostructure based on the theoretical calculations. To effectively utilize the synergistic effect and morphology, core and shell-interchangeable Fe₃O₄@MoS₂ and MoS₂@Fe₃O₄ nanocomposites (NCs) were elaborately constructed. By cont ...
DOI:
10.1016/j.jcis.2020.01.002

15. Achieving organic solar cells with efficiency over 14% based on a non-fullerene acceptor incorporating a cyclopentathiophene unit fused backbone

Author:
Cai, Yao; Meng, Lingxian; Gao, Huanhuan; Guo, Ziqi; Zheng, Nan; Xie, Zengqi; Zhang, Hongtao; Li, Chenxi; Wan, Xiangjian; Chen, Yongsheng
Source:
Journal of materials chemistry A 2020 v.8 no.10 pp. 5194-5199
ISSN:
2050-7496
Subject:
absorption,   etc   ; bromine; fluorine; semiconductors; solar cells;     Show all 5 Subjects
Abstract:
... The cyclopentadithiophene (CPT) unit is a classic building block for constructing organic semiconductor materials with excellent performances. In this work, we designed and synthesized a new acceptor BCPT-4F, incorporating a CPT fused central backbone. BCPT-4F shows a redshift absorption in the near-infrared region compared with CPT based acceptors with an unfused backbone. Importantly, the photov ...
DOI:
10.1039/d0ta00677g

16. 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:
absorption,   etc   ; magnetic fields; nanofluids; nanoparticles; vapors;     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

17. Numerical study of heat transfer influence on the performance of a single screw expander for Organic Rankine Cycle

Author:
Wang, Wei; Shen, Li-li; Chen, Ru-meng; Wu, Yu-ting; Ma, Chong-fang
Source:
Energy 2020 v.193 pp. 116683
ISSN:
0360-5442
Subject:
absorption,   etc   ; heat transfer; lubricants; temperature; thermodynamic models;     Show all 5 Subjects
Abstract:
... Heat dissipation was the one of the irreversible losses of expanders. For small capacity expanders, the influence of it on the performance of expanders might be more significant. Single screw expander (SSE) was a type of volumetric expander, which has a certain advantages in the Organic Rankine Cycle system. Investigating the characteristics of heat transfer in SSE was necessary because of the inf ...
DOI:
10.1016/j.energy.2019.116683

18. Dynamics of the Excited State in Photosynthetic Bacterial Reaction Centers

Author:
Parson, William W.
Source:
TheJournal of physical chemistry 2020 v.124 no.9 pp. 1733-1739
ISSN:
1520-5207
Subject:
absorption,   etc   ; bacteriochlorophyll; models; photosynthesis; spectral analysis; temperature;     Show all 6 Subjects
Abstract:
... In the initial charge-separation reaction of photosynthetic bacterial reaction centers, a dimer of strongly interacting bacteriochlorophylls (P) transfers an electron to a third bacteriochlorophyll (BL). It has been suggested that light first generates an exciton state of the dimer and that an electron then moves from one bacteriochlorophyll to the other within P to form a charge-transfer state (P ...
DOI:
10.1021/acs.jpcb.0c00497

19. D–π–A-Type Pyrene Derivatives with Different Push–Pull Properties: Broadband Absorption Response and Transient Dynamic Analysis

Author:
Niu, Ruipeng; Wang, Yuxiao; Wu, Xingzhi; Chen, Shuang; Zhang, Xueru; Song, Yinglin
Source:
Journal of physical chemistry 2020 v.124 no.9 pp. 5345-5352
ISSN:
1932-7455
Subject:
absorption,   etc   ; quantum mechanics; spectral analysis; wavelengths;     Show all 4 Subjects
Abstract:
... The nonlinear absorption properties and excited-state dynamics of two linear D−π–A pyrene derivatives (B1 and B2) with different push–pull properties were investigated and compared. The transient absorption spectra provide information about their excited states, revealing a transition from the local excited (LE) state to the charge transfer (CT) state in each of the compounds. The Z-scan measureme ...
DOI:
10.1021/acs.jpcc.9b11667

20. Controllable synthesis of conical BiVO₄ for photocatalytic water oxidation

Author:
Wang, Li Jie; Bai, Jing Yang; Zhang, Yi Jun; Mao, Fangxin; Liu, Yuanwei; Yuan, Haiyang; Liu, Peng Fei; Yang, Hua Gui
Source:
Journal of materials chemistry A 2020 v.8 no.5 pp. 2331-2335
ISSN:
2050-7496
Subject:
absorption,   etc   ; crystals; electric field; light; oxidation; photocatalysis;     Show all 6 Subjects
Abstract:
... Conical morphologies with sharp tips exhibit excellent optical absorption and electric field enhancement features. We have synthesized conical structured BiVO₄ crystals with a smooth curved surface and sharp tips by a simple two-phase route. The samples possess the ability to expand the visible light absorption region and are suitable for photocatalytic water oxidation. ...
DOI:
10.1039/c9ta12122f