PubAg

Main content area

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

Search

15,292  Search Results

« Previous | 1 - 20 of 15,292 |
Number of results to display per page

Search Results

1. Kinetically Controlled Photoinduced Phase Separation for Hybrid Radical/Cationic Systems

Author:
Hasa, Erion; Scholte, Jon P.; Jessop, Julie L. P.; Stansbury, Jeffrey W.; Guymon, C. Allan
Source:
Macromolecules 2019 v.52 no.8 pp. 2975-2986
ISSN:
1520-5835
Subject:
irradiation,   etc   ; polymers; separation;     Show all 3 Subjects
Abstract:
... Controlling phase separation in polymer systems has shown significant promise in combining properties of different components into an integrated polymer system. In this work, we investigate the effect of photoinduced phase separation on polymer morphology and properties in hybrid radical/cationic systems composed of butyl acrylate (BA) and difunctional oxetane (DOX). We show that the irradiation i ...
DOI:
10.1021/acs.macromol.9b00177

2. Processing characteristics of laser micro incising and possibility of its high speed processing

Author:
Fukuta, Satoshi; Nomura, Masaki; Ikeda, Takeshi; Wakabayashi, Koji
Source:
European journal of wood and wood products 2019 v.77 no.2 pp. 249-255
ISSN:
0018-3768
Subject:
irradiation,   etc   ; energy; incising; wood;     Show all 4 Subjects
Abstract:
... In order to clarify the processing characteristics of wood by UV laser and to improve the processing speed of laser micro incising, the influences of pulse repetition rate and pulse energy of the laser on processing efficiency were investigated. As a result, it was found that each parameter combined affects the processing efficiency and processing form of wood. Based on the optimum processing cond ...
DOI:
10.1007/s00107-019-01384-0

3. Mechanism of Photoluminescence Intermittency in Organic–Inorganic Perovskite Nanocrystals

Author:
Galisteo-López, Juan F.; Calvo, Mauricio E.; Rojas, T. Cristina; Míguez, Hernán
Source:
ACS applied materials & interfaces 2019 v.11 no.6 pp. 6344-6349
ISSN:
1944-8252
Subject:
irradiation,   etc   ; nanocrystals; oxygen; photoluminescence;     Show all 4 Subjects
Abstract:
... Lead halide perovskite nanocrystals have demonstrated their potential as active materials for optoelectronic applications over the past few years. Nevertheless, one issue that hampers their applicability has to do with the observation of photoluminescence intermittency, commonly referred to as “blinking”, as in their inorganic counterparts. Such behavior, reported for structures well above the qua ...
DOI:
10.1021/acsami.8b17122

4. Ion mass dependence of irradiation-induced damage accumulation in KTaO3

Author:
Velişa, Gihan; Wendler, Elke; Wang, Liang-Ling; Zhang, Yanwen; Weber, William J.
Source:
Journal of materials science 2019 v.54 no.1 pp. 149-158
ISSN:
0022-2461
Subject:
irradiation,   etc   ; ions; models; potassium;     Show all 4 Subjects
Abstract:
... Damage production and amorphization resulting from the interaction of medium-energy (from 40 to 480 keV) noble-gas ions (from He to Kr) with potassium tantalate (KTaO₃) are determined using ion channeling measurements. A disorder accumulation model has been fit to the maximum damage concentration versus ion fluence to extract the cross sections for direct-impact and defect-stimulated amorphization ...
DOI:
10.1007/s10853-018-2864-5

5. Enantioenrichment of racemic BINOL by way of excited state proton transfer

Author:
Ayad, Suliman; Posey, Victoria; Das, Anjan; Montgomery, Jason M.; Hanson, Kenneth
Source:
Chemical communications 2019 v.55 no.9 pp. 1263-1266
ISSN:
1364-548X
Subject:
irradiation,   etc   ; chemical compounds; chemical reactions;     Show all 3 Subjects
Abstract:
... Here we report a method for enantioenriching BINOL using a chiral auxiliary and an excited state proton transfer (ESPT) event. Regardless of the starting enantiomeric excess (ee), after irradiation the solution reaches a photostationary state whose ee is dependent solely on the identity of the chiral auxiliary group. The enantioenriched BINOL is easily recovered by cleaving the auxiliary group in ...
DOI:
10.1039/c8cc07949h

6. Rapid Faraday Rotation on ε-Iron Oxide Magnetic Nanoparticles by Visible and Terahertz Pulsed Light

Author:
Ohkoshi, Shin-ichi; Imoto, Kenta; Namai, Asuka; Yoshikiyo, Marie; Miyashita, Seiji; Qiu, Hongsong; Kimoto, Shodai; Kato, Kosaku; Nakajima, Makoto
Source:
Journal of the American Chemical Society 2019 v.141 no.4 pp. 1775-1780
ISSN:
1520-5126
Subject:
irradiation,   etc   ; chemistry; magnetism; models; nanoparticles;     Show all 5 Subjects
Abstract:
... Light- or electromagnetic wave-responsive magnetism is an attractive issue in spin chemistry and optical materials science. Herein we show the magnetization reversal induced by visible-light pulsed laser and the ultrafast dynamic magnetooptical effect caused by terahertz (THz) pulsed laser irradiation onto chemically synthesized magnetic films based on gallium–titanium–cobalt-substituted ε-Fe₂O₃ ( ...
DOI:
10.1021/jacs.8b12910

7. An unprecedented {Ni₁₄SiW₉} hybrid polyoxometalate with high photocatalytic hydrogen evolution activity

Author:
PailleThese authors contributed equally to this work., Grégoire; Boulmier, Amandine; Bensaid, Alexandre; Ha-Thi, Minh-Huong; Tran, Thu-Trang; Pino, Thomas; Marrot, Jérôme; Rivière, Eric; Hendon, Christopher H.; Oms, Olivier; Gomez-Mingot, Maria; Fontecave, Marc; Mellot-Draznieks, Caroline; Dolbecq, Anne; Mialane, Pierre
Source:
Chemical communications 2019 v.55 no.29 pp. 4166-4169
ISSN:
1364-548X
Subject:
irradiation,   etc   ; hydrogen production; light; nickel; photocatalysis;     Show all 5 Subjects
Abstract:
... A unique polyoxometalate complex made up of a tetradecanuclear nickel bisphosphonate cluster capping a {SiW₉} unit has been characterized. This stable compound exhibits a high hydrogen evolution reaction photocatalytic activity under visible light irradiation via a reductive quenching mechanism. ...
DOI:
10.1039/c9cc01269a

8. Enhancement of photocatalytic performance of TaON by combining it with noble-metal-free MoS2 cocatalysts

Author:
Chen, Yukai; Tan, Lijuan; Sun, Menglong; Lu, Chunhua; Kou, Jiahui; Xu, Zhongzi
Source:
Journal of materials science 2019 v.54 no.7 pp. 5321-5330
ISSN:
0022-2461
Subject:
irradiation,   etc   ; gold; molybdenum disulfide; photocatalysis; photocatalysts; platinum;     Show all 6 Subjects
Abstract:
... Utilizing cocatalysts is an effective measure to enhance photocatalytic activities of photocatalysts. Nevertheless, noble-metal cocatalysts such as Pt and Au impose astounding costs on the application of photocatalytic technology. Herein, noble-metal-free MoS₂ was used as a cocatalyst to improve the photocatalytic activity of visible-light-responsive TaON for the first time. This work indicates th ...
DOI:
10.1007/s10853-018-03214-9

9. “Saddle-shaped” dose-survival effect, is it a general and valuable phenomenon in microbes in response to heavy ion beam irradiation?

Author:
Guo, Xiaopeng; Zhang, Miaomiao; Gao, Yue; Li, Wenjian; Lu, Dong
Source:
Annals of microbiology 2019 v.69 no.3 pp. 221-232
ISSN:
1590-4261
Subject:
irradiation,   etc   ; bibliometric analysis; breeding; microorganisms; mutants; mutation;     Show all 6 Subjects
Abstract:
... We aimed to verify the “saddle-shaped” dose-survival effect of microbes in response to heavy ion beam irradiation (HI), and further determine the radiation parameter that affects saddle shape formation, and the relationship between the saddle region and the positive mutation rate. A bibliometric analysis was performed based on literature containing the dose-survival effect of microbes in response ...
DOI:
10.1007/s13213-019-1442-7

10. Self-Propelled Motion of a Camphor Disk on a Photosensitive Amphiphilic Molecular Layer

Author:
Nakata, Satoshi; Nasu, Kyoko; Irie, Yasutaka; Hatano, Sayaka
Source:
Langmuir 2019 v.35 no.12 pp. 4233-4237
ISSN:
1520-5827
Subject:
irradiation,   etc   ; camphor; photochemical reactions; photosensitivity; ultraviolet radiation;     Show all 5 Subjects
Abstract:
... We have studied the self-propelled motion of a camphor disk on a 2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetraphenyl-1,2′-biimidazole (o-Cl-HABI) molecular layer, which was developed on water, as a photomechanical sensing system. The o-Cl-HABI dimer changed to its monomeric form upon UV light irradiation, and as a result, the surface pressure of the o-Cl-HABI molecular layer decreased. The reciprocatin ...
DOI:
10.1021/acs.langmuir.8b04285

11. Enhanced photocatalytic activity of BiVO₄ coupled with iron-based complexes for water oxidation under visible light irradiation

Author:
Liang, Xiangming; Lin, Junqi; Cao, Xiaohu; Sun, Wanjun; Yang, Junyi; Ma, Baochun; Ding, Yong
Source:
Chemical communications 2019 v.55 no.17 pp. 2529-2532
ISSN:
1364-548X
Subject:
irradiation,   etc   ; chemical compounds; oxidation; oxygen; photocatalysis;     Show all 5 Subjects
Abstract:
... [Fe₂(TPA)₂(μ-O)Cl₂]²⁺ (TPA = tris(2-pyridylmethyl)amine) was investigated as a pre-catalyst, and greatly enhanced the photocatalytic water oxidation activity of BiVO₄. An extremely high oxygen yield of 99.1% and apparent quantum yield of 44.3% were obtained in the BiVO₄–NaIO₃ photocatalytic water oxidation system. ...
DOI:
10.1039/c8cc09807g

12. Massively enhanced ionic transport in irradiated crystalline pyrochlore

Author:
Kreller, Cortney R.; Valdez, James A.; Holesinger, Terry G.; Morgan, Jonathan; Wang, Yongqiang; Tang, Ming; Garzon, Fernando H.; Mukundan, Rangachary; Brosha, Eric L.; Uberuaga, Blas P.
Source:
Journal of materials chemistry A 2019 v.7 no.8 pp. 3917-3923
ISSN:
2050-7496
Subject:
irradiation,   etc   ; chemistry; ions; mass transfer; oxides;     Show all 5 Subjects
Abstract:
... Crystalline disorder in complex oxides can have a pronounced effect on mass transport, but the role of disorder within the complex landscape of material and microstructural defects is not uniquely understood. In this work, we use radiation damage, not to study the fundamental damage response, but rather as a tool to induce and control the extent of disorder of a single oxide composition in order t ...
DOI:
10.1039/c8ta10967b

13. Trifluoromethylation of Unactivated Alkenes with Me₃SiCF₃ and N-Iodosuccinimide

Author:
Yang, Xinkan; Tsui, Gavin Chit
Source:
Organic letters 2019 v.21 no.5 pp. 1521-1525
ISSN:
1523-7052
Subject:
irradiation,   etc   ; alkenes; chemical reactions; feedstocks; moieties; photocatalysts;     Show all 6 Subjects
Abstract:
... A novel approach to the trifluoromethylation of unactivated alkenes is presented. This reaction is promoted by N-iodosuccinimide (NIS) under visible light irradiation without the need for photocatalysts. The mild conditions allow the direct synthesis of useful trifluoromethylated (E)-alkenes from readily available alkene feedstocks with excellent functional group tolerability. In addition, using e ...
DOI:
10.1021/acs.orglett.9b00332

14. Designing photolabile ruthenium polypyridyl crosslinkers for hydrogel formation and multiplexed, visible-light degradation

Author:
Rapp, Teresa L.; Wang, Yanfei; Delessio, Maegan A.; Gau, Michael R.; Dmochowski, Ivan J.
Source:
RSC advances 2019 v.9 no.9 pp. 4942-4947
ISSN:
2046-2069
Subject:
irradiation,   etc   ; alkynes; crosslinking; hydrogels; ligands; ruthenium; wavelengths;     Show all 7 Subjects
Abstract:
... Photoresponsive materials afford spatiotemporal control over desirable physical, chemical and biological properties. For advanced applications, there is need for molecular phototriggers that are readily incorporated within larger structures, and spatially-sequentially addressable with different wavelengths of visible light, enabling multiplexing. Here we describe spectrally tunable (λₘₐₓ = 420–530 ...
DOI:
10.1039/c8ra09764j

15. Effect of symmetrical and asymmetrical tilt grain boundaries on the tensile deformation of zirconium bicrystals: a MD-based study

Author:
Singh, Divya; Parashar, Avinash; Kedharnath, A.; Kapoor, Rajeev; Sarkar, Apu
Source:
Journal of materials science 2019 v.54 no.4 pp. 3082-3095
ISSN:
0022-2461
Subject:
irradiation,   etc   ; crystals; deformation; tensile strength; zirconium;     Show all 5 Subjects
Abstract:
... The aim of this article was to study the effect of symmetrical as well as asymmetrical tilt grain boundaries on the tensile deformation of irradiated bicrystalline zirconium. Molecular statics-based simulations were performed to generate both types of tilt grain boundaries with [0001] and [Formula: see text] as the tilt axis. Effect of irradiation-induced point defects was studied with respect to ...
DOI:
10.1007/s10853-018-3032-7

16. Photocontrollable Wrinkle Morphology Evolution on Azo-Based Multilayers for Hierarchical Surface Micropatterns Fabrication

Author:
Zong, Chuanyong; Azhar, Umair; Zhou, Chunhua; Wang, Juanjuan; Zhang, Luqing; Cao, Yanping; Zhang, Shuxiang; Jiang, Shichun; Lu, Conghua
Source:
Langmuir 2019 v.35 no.7 pp. 2601-2609
ISSN:
1520-5827
Subject:
irradiation,   etc   ; oxygen; photoisomerization; polystyrenes; stress relaxation;     Show all 5 Subjects
Abstract:
... Inspired by nature, comprehensive understanding and ingenious utilization of the self-organized wrinkling behaviors of the sandwiched multilayer bonded on substrates are important for engineering and/or functional laminated devices design. Herein, we report a facile and effective strategy to regulate the wrinkles morphology evolution and the resultant hierarchical surface micropatterns on azobenze ...
DOI:
10.1021/acs.langmuir.8b04237

17. Visible light intensity dependent negative photochromism of a binaphthyl-bridged phenoxyl-imidazolyl radical complex

Author:
Yonekawa, Izumi; Mutoh, Katsuya; Abe, Jiro
Source:
Chemical communications 2019 v.55 no.9 pp. 1221-1224
ISSN:
1364-548X
Subject:
irradiation,   etc   ; chemical compounds; light intensity; photochemical reactions;     Show all 4 Subjects
Abstract:
... We herein report a novel biphotochromic molecule composed of two fast negative photochromic phenoxyl-imidazolyl radical complex units showing incident light intensity dependence of the photochemical reaction. The electronic coupling between the two fast negative photochromic units gives a non-linear photoresponse; weak- and intense-visible light irradiation proceed the one-photon and two-photon ph ...
DOI:
10.1039/c8cc09591d

18. Photo-regulatable DNA isothermal amplification by template-mediated ligation

Author:
Cheng, Bohao; Kashida, Hiromu; Shimada, Naohiko; Maruyama, Atsushi; Asanuma, Hiroyuki
Source:
Chemical communications 2019 v.55 no.8 pp. 1080-1083
ISSN:
1364-548X
Subject:
irradiation,   etc   ; DNA; chemical reactions; lysine; oligonucleotides; polymers;     Show all 6 Subjects
Abstract:
... By combining azobenzene-tethered oligonucleotides as modulators and poly(l-lysine)-graft-dextran (PLL-g-Dex), a chaperone polymer, to facilitate strand displacement, we successfully developed a photo-regulatable DNA isothermal amplification method. By alternating UV and visible irradiation, linear amplification was achieved. The method enables photo-regulatability and mismatch discrimination in li ...
DOI:
10.1039/c8cc09218d

19. A recyclable self-assembled composite catalyst consisting of Fe₃O₄-rose bengal-layered double hydroxides for highly efficient visible light photocatalysis in water

Author:
HuangThese authors contributed equally to this work., Yuxing; Xin, Zhuo; Yao, Wenlong; Hu, Qi; Li, Zhuohua; Xiao, Liuqing; Yang, Bo; Zhang, Junmin
Source:
Chemical communications 2018 v.54 no.96 pp. 13587-13590
ISSN:
1364-548X
Subject:
irradiation,   etc   ; hydroxides; photocatalysis; photocatalysts;     Show all 4 Subjects
Abstract:
... The first case of a highly efficient layered double hydroxide (LDH) supported organic visible light photocatalyst is reported and it can catalyze various organic transformations with high efficiency in water under visible light irradiation. ...
DOI:
10.1039/c8cc08130a

20. Historical experiment to measure irradiation-induced creep of graphite

Author:
Campbell, Anne A.
Source:
Carbon 2018 v.139 pp. 279-288
ISSN:
0008-6223
Subject:
irradiation,   etc   ; graphene; models; temperature;     Show all 4 Subjects
Abstract:
... This paper presents historical results of graphite irradiation-induced creep experiments that were performed at Oak Ridge National Laboratory from the 1950's to the 1970's. These experiments were performed at temperatures from 150°C to 1000 °C, and bend stresses ranging from 500 to 5000 psi (∼3.3–34.5 MPa). The experimental setup utilized in-situ measurement of specimen displacement, on-line appli ...
DOI:
10.1016/j.carbon.2018.06.055