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1. Qualitative colorimetric analysis of a Ir(iii)/Eu(iii) dyad in the presence of chemical warfare agents and simulants on a paper matrix

Author:
Dennison, Genevieve H.; Curty, Christophe; Metherell, Alexander J.; Micich, Eva; Zaugg, Andreas; Ward, Michael D.
Source:
RSC advances 2019 v.9 no.14 pp. 7615-7619
ISSN:
2046-2069
Subject:
absorption,   etc   ; color; colorimetry; luminescence;     Show all 4 Subjects
Abstract:
... The addition of G- and V-series organophosphorus chemical warfare agents and simulants to a paper-based assay of a dual-luminescent Ir(iii)/Eu(iii) dyad generated different emissive responses between the classes and compound types. The emission responses are complex and based not only on altering the balance between red Eu(iii)-based and blue Ir(iii)-based luminescent components, but also incorpor ...
DOI:
10.1039/c9ra00824a

2. Aligned Fe microfiber reinforced epoxy composites with tunable electromagnetic properties and improved microwave absorption

Author:
Qing, Yuchang; Nan, Hanyi; Jia, Hongyao; Min, Dandan; Zhou, Wancheng; Luo, Fa
Source:
Journal of materials science 2019 v.54 no.6 pp. 4671-4679
ISSN:
0022-2461
Subject:
absorption,   etc   ; epoxides; iron; permeability;     Show all 4 Subjects
Abstract:
... Aligned Fe microfiber/epoxy composites (FMF/EP) were prepared by shear force. The effects of the alignment on the morphology, electromagnetic properties and microwave absorption performances were studied. The results showed that the FMF inclines to be aligned uniformly after alignment treatment. The aligned FMF/EP composite exhibits higher complex permeability and lower complex permittivity in the ...
DOI:
10.1007/s10853-018-03192-y

3. Non-Kasha Behavior in Quadrupolar Dye Aggregates: The Red-Shifted H-Aggregate

Author:
Zheng, Chenyu; Zhong, Chuwei; Collison, Christopher J.; Spano, Frank C.
Source:
Journal of physical chemistry 2019 v.123 no.5 pp. 3203-3215
ISSN:
1932-7455
Subject:
absorption,   etc   ; dyes; models; photoluminescence;     Show all 4 Subjects
Abstract:
... Aggregates of quadrupolar DAD-type chromophores are investigated theoretically using the essential states model (ESM) enhanced to include vibronic coupling. On the basis of vibronic signatures in the absorption and photoluminescence spectra, important connections are made to the Frenkel exciton model, which is the basis for defining conventional H- and J-aggregates. In contrast to the exciton theo ...
DOI:
10.1021/acs.jpcc.8b11416

4. Composite graphene-metal microstructures for enhanced multiband absorption covering the entire terahertz range

Author:
Ye, Longfang; Zeng, Fang; Zhang, Yong; Liu, Qing Huo
Source:
Carbon 2019 v.148 pp. 317-325
ISSN:
0008-6223
Subject:
absorption,   etc   ; absorbance; detectors; graphene; microstructure;     Show all 5 Subjects
Abstract:
... We numerically demonstrate a novel route to effectively enhancing multi-band terahertz absorption enabled by a variety of tunable polarization-insensitive multiband terahertz absorbers based on composite graphene and metal microstructures. In these devices, the multiband plasmon resonance absorption in graphene, resulted from the Fabry–Pérot cavity between the continuous graphene and the underneat ...
DOI:
10.1016/j.carbon.2019.03.086

5. Study on the wet-web strength and pressability of paper sheet during the press process with the addition of nano-fibrillated cellulose (NFC)

Author:
Lu, Zonghong; An, Xingye; Zhang, Hao; Guan, Min; Liu, Jing; Sun, Yiwei; Nie, Shuangxi; Cao, Haibing; Lu, Bin; Liu, Hongbin
Source:
Carbohydrate polymers 2019 v.210 pp. 332-338
ISSN:
0144-8617
Subject:
absorption,   etc   ; cellulose; drainage; energy; paper;     Show all 5 Subjects
Abstract:
... The properties of wet-web strength and pressability of base paper affect the frequency of sheet breaks and machine runnability during the paper-making process. In this paper, the effect of nano-fibrillated cellulose (NFC) on the wet-web strength and pressability of paper sheet during the press process of paper-making was explored. It was found that the tensile energy absorption (TEA) of the sample ...
DOI:
10.1016/j.carbpol.2019.01.083

6. A simple strategy to improve the sensitivity of probe molecules on SERS substrates

Author:
Sun, Chengbin; Chen, Tingkun; Ruan, Weidong; Jung, Young Mee; Cong, Qian; Zhao, Bing
Source:
Talanta 2019 v.195 pp. 221-228
ISSN:
0039-9140
Subject:
absorption,   etc   ; Raman spectroscopy; detection limit;     Show all 3 Subjects
Abstract:
... In this work, we report a simple strategy to improve the detection sensitivity as well as the spectral quality of probe molecules on surface-enhanced Raman scattering (SERS) substrates. On normal SERS substrates, due to the decreased absorption capacity and changes in the molecule orientations, SERS signals disappear when the analyte molecule concentrations reach a limit value. To solve this probl ...
DOI:
10.1016/j.talanta.2018.11.040

7. Dynamic tests of CO2-Based waste heat recovery system with preheating process

Author:
Shi, Lingfeng; Shu, Gequn; Tian, Hua; Chen, Tianyu; Liu, Peng; Li, Ligeng
Source:
Energy 2019 v.171 pp. 270-283
ISSN:
0360-5442
Subject:
absorption,   etc   ; energy; heat recovery; temperature;     Show all 4 Subjects
Abstract:
... For engine waste heat recovery, CO2-based Transcritical Rankine Cycle (CTRC) system with preheating process has a strong capability of combining exhaust gas and engine coolant, thereby leading to improvement of output, efficiency improvement and the reduction in cooling load reduction. In previous researches, all the benefits were achieved and investigated mainly under ideal and stable engine cond ...
DOI:
10.1016/j.energy.2018.12.123

8. Three-Photon Absorption of Coordination Polymer Transforms UV-to-VIS Thermometry into NIR-to-VIS Thermometry

Author:
Zaręba, Jan K.; Nyk, Marcin; Janczak, Jan; Samoć, Marek
Source:
ACS applied materials & interfaces 2019 v.11 no.11 pp. 10435-10441
ISSN:
1944-8252
Subject:
absorption,   etc   ; coordination polymers; temperature; wavelengths;     Show all 4 Subjects
Abstract:
... Lanthanide-based metal–organic frameworks (MOFs) and coordination polymers (CPs) attract much attention as candidates for optical ratiometric thermometry applications. Thus far, excitation of these materials was mainly performed in the ultraviolet that drastically limits their applicability as sensors, e.g., in tissue biological thermometry. As a remedy for this constraint, for the first time, we ...
DOI:
10.1021/acsami.8b21937

9. Near-infrared absorption by intramolecular charge-transfer transition in 5,10,15,20-tetra(N-carbazolyl)porphyrin through protonation

Author:
Kawano, Shin-ichiro; Kawada, Sae; Kitagawa, Yasutaka; Teramoto, Rena; Nakano, Masayoshi; Tanaka, Kentaro
Source:
Chemical communications 2019 v.55 no.20 pp. 2992-2995
ISSN:
1364-548X
Subject:
absorption,   etc   ; carbazoles; moieties; porphyrins; protonation;     Show all 5 Subjects
Abstract:
... A porphyrin coupled quadruply with N-carbazolyl groups at the meso positions has been synthesized. Because of the electron-withdrawing nature of the carbazole units at the porphyrin centre, the tetra(N-carbazolyl)porphyrin and the protonated derivative display unique absorption bands derived from intramolecular charge-transfer transition from the carbazoles to the porphyrin moiety. ...
DOI:
10.1039/c8cc09667h

10. Coarse-Grained Simulations of Nanogel Composites: Electrostatic and Steric Effects

Author:
Ramos-Tejada, María del Mar; Quesada-Pérez, Manuel
Source:
Macromolecules 2019 v.52 no.6 pp. 2223-2230
ISSN:
1520-5835
Subject:
absorption,   etc   ; electrolytes; electrostatic interactions; nanoparticles;     Show all 4 Subjects
Abstract:
... Monte Carlo coarse-grained simulations of nanogels loaded with nanoparticles are presented, paying special attention to two phenomena revealed by experiments with real composites: the deswelling and charge inversion observed after the absorption of nanoparticles. Both can be justified here exclusively in terms of electrostatic and excluded volume interactions. According to our results, charge inve ...
DOI:
10.1021/acs.macromol.8b02657

11. Metal–Organic Framework-Based PB@MoS₂ Core–Shell Microcubes with High Efficiency and Broad Bandwidth for Microwave Absorption Performance

Author:
Zhao, Zixiang; Xu, Shenwei; Du, Zuojuan; Jiang, Chao; Huang, Xiaozhong
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.7 pp. 7183-7192
ISSN:
2168-0485
Subject:
absorption,   etc   ; engineering; metals; microwave radiation;     Show all 4 Subjects
Abstract:
... In this study, we fabricated a unique core–shell structure of PB@MoS₂ microcubes for the first time (PB stands for Prussian blue) and examined the microwave absorption performance in the frequency range of 2–18 GHz. The results showed the hybrid PB@MoS₂ core–shell structure has an excellent microwave absorbing property. The minimum reflection loss value was found to be −42.83 dB with a thickness o ...
DOI:
10.1021/acssuschemeng.9b00191

12. Emission Properties and Ultrafast Carrier Dynamics of CsPbCl₃ Perovskite Nanocrystals

Author:
Ahumada-Lazo, Ruben; Alanis, Juan A.; Parkinson, Patrick; Binks, David J.; Hardman, Samantha J. O.; Griffiths, James T.; Wisnivesky Rocca Rivarola, Florencia; Humphrey, Colin J.; Ducati, Caterina; Davis, Nathaniel J. L. K.
Source:
Journal of physical chemistry 2019 v.123 no.4 pp. 2651-2657
ISSN:
1932-7455
Subject:
absorption,   etc   ; energy; nanocrystals; photoluminescence; spectroscopy;     Show all 5 Subjects
Abstract:
... Fluence-dependent photoluminescence and ultrafast transient absorption spectroscopy are used to study the dynamic behavior of carriers in CsPbCl₃ perovskite nanocrystals. At low excitation fluences, the radiative recombination rate is outcompeted by significant trapping of the charge carriers which then recombine nonradiatively, resulting in weak photoluminescence. As fluence is increased, the sat ...
DOI:
10.1021/acs.jpcc.8b11906

13. Wave-body interactions among energy absorbers in a wave farm

Author:
Zhong, Qian; Yeung, Ronald W.
Source:
Applied energy 2019 v.233-234 pp. 1051-1064
ISSN:
0306-2619
Subject:
absorption,   etc   ; energy; farms; geometry; hydrodynamics;     Show all 5 Subjects
Abstract:
... A semi-analytical method is developed to investigate surface-wave interactions among an array of wave-energy converters, each modeled as a truncated cylinder, and the interaction effects on power absorption from the array is studied. Each cylinder can have independent movements with six degrees of freedom. The method of matched eigen-function expansions is applied to solve the wave radiation probl ...
DOI:
10.1016/j.apenergy.2018.09.131

14. Investigation of multiband plasmonic metamaterial perfect absorbers based on graphene ribbons by the phase-coupled method

Author:
Li, Hongju; Ji, Chuansheng; Ren, Yongze; Hu, Jigang; Qin, Meng; Wang, Lingling
Source:
Carbon 2019 v.141 pp. 481-487
ISSN:
0008-6223
Subject:
absorption,   etc   ; angle of incidence; graphene;     Show all 3 Subjects
Abstract:
... We develop an original phase-coupled method to realize multispectral metamaterial near-unity absorbers based on spatially separated graphene ribbon arrays with mid-infrared plasmonic resonances. The results both from the coupled-mode theory and finite-difference time-domain simulations reveal that in addition to the single-band absorption enabled by the bi-layer identical ribbon arrays, the outsta ...
DOI:
10.1016/j.carbon.2018.10.002

15. Multifunctional broadband microwave absorption of flexible graphene composites

Author:
Zhang, Kai-Lun; Zhang, Jun-Ying; Hou, Zhi-Ling; Bi, Song; Zhao, Quan-Liang
Source:
Carbon 2019 v.141 pp. 608-617
ISSN:
0008-6223
Subject:
absorption,   etc   ; graphene; magnetism; polypropylenes; robots;     Show all 5 Subjects
Abstract:
... Stable broadband microwave absorption is widely interested for their irreplaceable role in stealth technology for multiband microwave communication and detection. In this paper, a flexible broadband microwave absorber with self-recoverability was fabricated by self-assembling graphene sheets into polypropylene 3D framework. The as-fabricated absorber has a full-band absorption (more than 90%) in t ...
DOI:
10.1016/j.carbon.2018.10.024

16. Improving moisture stability of SrLiAl3N4:Eu2+ through phosphor-in-glass approach to realize its application in plant growing LED device

Author:
Zhang, Yu; Zhang, Xuejie; Zhang, Haoran; Zhuang, Jianle; Hu, Chaofan; Liu, Yingliang; Wu, Zhan-Chao; Ma, Li; Wang, Xiaojun; Lei, Bingfu
Source:
Journal of colloid and interface science 2019 v.545 pp. 195-199
ISSN:
0021-9797
Subject:
absorption,   etc   ; chlorophyll; emissions factor; glass; luminescence; swine;     Show all 6 Subjects
Abstract:
... Herein, we present a simple strategy to enhance the stability of water-sensitive SrLiAl3N4:Eu2+ phosphor through embedding the phosphor particles into low-melting Sn-P-F-O glass using phosphor-in-glass (PiG) approach. After being immersed in water for 96 h, the emission intensity of the SrLiAl3N4:Eu2+-PiG sample was maintained at 80% of its pristine intensity, indicating the moisture-resistance pr ...
DOI:
10.1016/j.jcis.2019.03.032

17. Effects of heat source temperature and mixture composition on the combined superiority of dual-pressure evaporation organic Rankine cycle and zeotropic mixtures

Author:
Li, Jian; Ge, Zhong; Duan, Yuanyuan; Yang, Zhen
Source:
Energy 2019 v.174 pp. 436-449
ISSN:
0360-5442
Subject:
absorption,   etc   ; butanes; evaporation; heat; pentane; temperature;     Show all 6 Subjects
Abstract:
... Dual-pressure evaporation cycle is an emerging cycle type in the organic Rankine cycle (ORC) that can remarkably reduce the irreversible loss during heat absorption process and improve the adaptability to various heat sources. Introduction of zeotropic mixtures in dual-pressure evaporation ORC presents great potential to further increase the heat-power conversion efficiency due to the variable pha ...
DOI:
10.1016/j.energy.2019.02.186

18. Role of stuffer layers and fibre volume fractions on the mechanical properties of 3D woven fabrics for structural composites applications

Author:
Dash, Ashwini Kumar; Behera, Bijoya Kumar
Source:
The journal of the Textile Institute 2019 v.110 no.4 pp. 614-624
ISSN:
1754-2340
Subject:
absorption,   etc   ; energy; tensile strength; weaving; woven fabrics;     Show all 5 Subjects
Abstract:
... Using weaving technology, possible manipulations can be done so as to derive maximum advantage from the reinforcements towards desired mechanical properties of the composites. Thus with different sets of weaving parameters and tow linear densities, an attempt has been made to investigate tensile, impact and knife penetration performance of different stuffer layers and fibre volume fractions of 3D ...
DOI:
10.1080/00405000.2018.1502502

19. Operational principles of circular economy for sustainable development: Linking theory and practice

Author:
Suárez-Eiroa, Brais; Fernández, Emilio; Méndez-Martínez, Gonzalo; Soto-Oñate, David
Source:
Journal of cleaner production 2019 v.214 pp. 952-961
ISSN:
0959-6526
Subject:
absorption,   etc   ; circular economy; education; sustainable development;     Show all 4 Subjects
Abstract:
... The scientific literature about circular economy (CE) is scarce yet, and both conceptual discussions and the development of practical strategies for its implementation are still emerging. Although CE systems are currently being implemented, CE goals and principles need to be better considered and translated into actions, and more coordinated actions among different levels of implementation are nec ...
DOI:
10.1016/j.jclepro.2018.12.271

20. Electronic Structure of LiCoO₂ Surfaces and Effect of Al Substitution

Author:
Hong, Liang; Hu, Linhua; Freeland, John W.; Cabana, Jordi; Öğüt, Serdar; Klie, Robert F.
Source:
Journal of physical chemistry 2019 v.123 no.14 pp. 8851-8858
ISSN:
1932-7455
Subject:
absorption,   etc   ; X-radiation; aluminum; cobalt; models; spectroscopy;     Show all 6 Subjects
Abstract:
... The surface properties of LiCoO₂ nanoplatelets, and their chemical modifications with Al³⁺, were studied using combined experimental and theoretical approaches. Our model shows that the electronic structures of several LiCoO₂ surface facets are significantly different from those of bulk LiCoO₂, due to altered spin states of surface Co³⁺ atoms. O K-edge X-ray absorption revealed a prominent splitti ...
DOI:
10.1021/acs.jpcc.8b11661