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You searched for: Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term annealing Remove constraint Subject term: annealing
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1. 19-Fold thermal conductivity increase of carbon nanotube bundles toward high-end thermal design applications

Author:
Yangsu Xie; Tianyu Wang; Bowen Zhu; Chaoyi Yan; Peixin Zhang; Xinwei Wang; Gyula Eres
Source:
Carbon 2018 v.139 pp. 445-458
ISSN:
0008-6223
Subject:
Raman spectroscopy; ambient temperature; annealing; carbon; carbon nanotubes; electrical resistance; thermal conductivity; thermal diffusivity; vapors
Abstract:
... In high temperature annealing of carbon nanotube (CNTs) bundles for structure and thermal conductivity (κ) improvement, the statistical errors from sample-wide structure variation and sample transfer/preparation significantly overshadows the understanding of structure-κ correlation and change. In this work, the sequential process of current-induced thermal annealing (CITA) on improving the structu ...
DOI:
10.1016/j.carbon.2018.07.009

2. 2D holey cobalt sulfide nanosheets derived from metal–organic frameworks for high-rate sodium ion batteries with superior cyclability

Author:
Yanfeng Dong; Wen Shi; Pengfei Lu; Jieqiong Qin; Shuanghao Zheng; Bingsen Zhang; Xinhe Bao; Zhong-Shuai Wu
Source:
Journal of materials chemistry 2018 v.6 no.29 pp. 14324-14329
ISSN:
2050-7496
Subject:
active sites; annealing; anodes; batteries; chemical bonding; cobalt; cobalt sulfide; coordination polymers; electrolytes; energy; nanopores; nanosheets; screening; simulation models
Abstract:
... Sodium ion batteries (SIBs) for large-scale grid applications are facing great challenges in terms of development of high-performance electrode materials and screening of suitable electrolytes. Herein, a versatile and scalable protocol for synthesizing two-dimensional (2D) holey cobalt sulfide (h-Co₄S₃) nanosheets is demonstrated for high-rate and long-life SIBs in an ether-based electrolyte of 1. ...
DOI:
10.1039/c8ta05612a

3. 3D hierarchical bayberry-like Ni@carbon hollow nanosphere/rGO hybrid as a new interesting electrode material for simultaneous detection of small biomolecules

Author:
Lei Zhang; Jing Zhang
Source:
Talanta 2018 v.178 pp. 608-615
ISSN:
0039-9140
Subject:
annealing; ascorbic acid; coordination polymers; dopamine; electrodes; electrolytes; graphene; graphene oxide; humans; nanospheres; nickel; quantitative analysis; uric acid; urine
Abstract:
... Metal-organic framework derived hierarchical bayberry-like Ni@carbon hollow nanosphere/reduced graphene oxide (Ni@CHS/rGO) hybrid was synthesized by combining a simple solvothermal reaction with a further annealing treatment. 3D hierarchical bayberry-like Ni@CHS/rGO hybrid not only offered a continuous highly conductive Ni metal and graphene matrix to facilitate the charge transfer, but also allow ...
DOI:
10.1016/j.talanta.2017.09.086

4. 3D nanoporous Ni/V₂O₃ hybrid nanoplate assemblies for highly efficient electrochemical hydrogen evolution

Author:
Mei Ming; Yuling Ma; Yun Zhang; Lin-Bo Huang; Lu Zhao; Yu-Yun Chen; Xing Zhang; Guangyin Fan; Jin-Song Hu
Source:
Journal of materials chemistry A 2018 v.6 no.43 pp. 21452-21457
ISSN:
2050-7496
Subject:
active sites; annealing; catalysts; catalytic activity; durability; electrical properties; electrochemistry; hydrogen production; mass transfer; nanopores; nickel; structure-activity relationships; vanadium
Abstract:
... Nickel-based non-noble-metal materials have emerged as promising catalysts for electrochemical hydrogen production in view of their attractive intrinsic activities, electrical properties and low cost. Exploring new candidates for further improving the performances of nickel-based catalysts and understanding the structure–activity relationship are still necessary to reduce the overpotential of the ...
DOI:
10.1039/c8ta07701k

5. A 3D architecture composite of porous vanadium nitride nanoribbons and reduced graphene oxide as a high-efficiency counter electrode for dye-sensitized solar cells

Author:
Guiqiang Wang; Shuo Hou; Chao Yan; Wei Zhang
Source:
RSC advances 2018 v.8 no.2 pp. 1083-1088
ISSN:
2046-2069
Subject:
active sites; ammonia; annealing; argon (noble gases); electrochemistry; electrodes; electrolytes; graphene oxide; nitrides; solar cells; vanadium
Abstract:
... A three-dimensional (3D) porous architecture combining porous vanadium nitride nanoribbons with reduced graphene oxide was prepared through a hydrothermal process and subsequent thermal annealing in an ammonia/argon mixed atmosphere. Then, the obtained 3D porous vanadium nitride nanoribbon/reduced graphene oxide (PVNN/RGO) composite was explored as the counter electrode of dye-sensitized solar cel ...
DOI:
10.1039/c7ra11279c

6. A Facile Synthetic Route to Multifunctional Poly(3-hexylthiophene)-b-poly(phenyl isocyanide) Copolymers: From Aggregation-Induced Emission to Controlled Helicity

Author:
Lei Xu; Xun-Hui Xu; Na Liu; Hui Zou; Zong-Quan Wu
Source:
Macromolecules 2018 v.51 no.19 pp. 7546-7555
ISSN:
1520-5835
Subject:
amines; annealing; catalysts; composite polymers; copolymerization; crosslinking; methanol; moieties; nickel; toluene
Abstract:
... New synthetic methods are of great significance in enabling access to valuable compounds and materials. Although conjugated poly(3-hexylthiophene) (P3HT) has been widely investigated, P3HT copolymers containing functional groups (such as amino, imino, hydroxyl, etc.) are rarely reported because of inherent synthetic difficulties. Here P3HT copolymers bearing diverse functional pendants, which cann ...
DOI:
10.1021/acs.macromol.8b01478

7. A Facile and Green Approach to Synthesize Mesoporous Anatase TiO2 Nanomaterials for Efficient Dye-Sensitized and Hole-Conductor-Free Perovskite Solar Cells

Author:
Liang Chu; Jie Zhang; Wei Liu; Rui Zhang; Jian Yang; Ruiyuan Hu; Xing’ao Li; Wei Huang
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.4 pp. 5588-5597
ISSN:
2168-0485
Subject:
acetic acid; annealing; electrodes; microparticles; nanoparticles; nanowires; physicochemical properties; pollution; porous media; solar cells; titanium; titanium dioxide
Abstract:
... Mesoporous anatase TiO₂ nanomaterials (MATNs) with both large specific surface areas and structural coherence are highly desirable to achieve excellent physicochemical properties for photovoltaic applications, but the existing synthesis methods either need templates or cause pollution. Herein we report a simple, template-free, and green approach to synthesize MATNs consisting of interconnected nan ...
DOI:
10.1021/acssuschemeng.8b00607

8. A Scalable Route to Nanoporous Large-Area Atomically Thin Graphene Membranes by Roll-to-Roll Chemical Vapor Deposition and Polymer Support Casting

Author:
Piran R. Kidambi; Dhanushkodi D. Mariappan; Nicholas T. Dee; Andrey Vyatskikh; Sui Zhang; Rohit Karnik; A. John Hart
Source:
ACS applied materials & interfaces 2018 v.10 no.12 pp. 10369-10378
ISSN:
1944-8252
Subject:
annealing; cost effectiveness; foil; graphene; manufacturing; nanopores; polymers; vapors
Abstract:
... Scalable, cost-effective synthesis and integration of graphene is imperative to realize large-area applications such as nanoporous atomically thin membranes (NATMs). Here, we report a scalable route to the production of NATMs via high-speed, continuous synthesis of large-area graphene by roll-to-roll chemical vapor deposition (CVD), combined with casting of a hierarchically porous polymer support. ...
DOI:
10.1021/acsami.8b00846

9. A Study on the Weak Ferromagnetism of Nanocrystalline Stannous Oxide Induced by L-Shaped O–Sn–O Vacancies

Author:
Yadong Lian; Xiaokun Huang; Min Gu
Source:
Journal of physical chemistry 2018 v.123 no.1 pp. 719-724
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; ambient temperature; annealing; cations; electron paramagnetic resonance spectroscopy; ferromagnetism; models; nanocrystals; nitrogen; oxygen; physical chemistry; tin; tin monoxide
Abstract:
... Nanocrystalline stannous oxide (SnO) powder has been prepared by ball-milling of micrometer-SnO in a nitrogen atmosphere. A cation deficiency of 6.5% was found in the nano-SnO sample by X-ray photoelectron spectroscopy. After annealing at 350, 450, or 550 °C under dynamic vacuum conditions, oxygen vacancies were found in the nano-SnO samples, as verified by electron paramagnetic resonance experime ...
DOI:
10.1021/acs.jpcc.8b10562

10. A Two-Dimensional ‘Zigzag’ Silica Polymorph on a Metal Support

Author:
David Kuhness; Hyun Jin Yang; Hagen W. Klemm; Mauricio Prieto; Gina Peschel; Alexander Fuhrich; Dietrich Menzel; Thomas Schmidt; Xin Yu; Shamil Shaikhutdinov; Adrian Lewandowski; Markus Heyde; Anna Kelemen; Radosław Włodarczyk; Denis Usvyat; Martin Schütz; Joachim Sauer; Hans-Joachim Freund
Source:
Journal of the American Chemical Society 2018 v.140 no.19 pp. 6164-6168
ISSN:
1520-5126
Subject:
X-ray photoelectron spectroscopy; annealing; density functional theory; energy; models; scanning tunneling microscopy; silica; stoichiometry; temperature
Abstract:
... We present a new polymorph of the two-dimensional (2D) silica film with a characteristic ‘zigzag’ line structure and a rectangular unit cell which forms on a Ru(0001) metal substrate. This new silica polymorph may allow for important insights into growth modes and transformations of 2D silica films as a model system for the study of glass transitions. Based on scanning tunneling microscopy, low en ...
DOI:
10.1021/jacs.8b02905
PubMed:
29688718
PubMed Central:
PMC6078382

11. A control of structural morphology via introducing insulating polymers in n-type P(NDI2OD-T2) semiconductor

Author:
Yu Jin Kim
Source:
Journal of materials science 2018 v.53 no.14 pp. 10513-10522
ISSN:
0022-2461
Subject:
annealing; films (materials); polymers; semiconductors
Abstract:
... An issue for the morphology control of organic materials in active layer has still been in spotlight. Most research people have focused on the p-type semiconducting compounds; however, the studies on the n-type materials are rarely conducted. Thus, in this paper, we systematically controlled the morphology of the n-type semiconductor by introducing insulating polymers, PS and PAN. We analyzed the ...
DOI:
10.1007/s10853-018-2300-x

12. A facile annealing strategy for achieving in situ controllable Cu₂O nanoparticle decorated copper foil as a current collector for stable lithium metal anodes

Author:
Qi Zhang; Jingyi Luan; Yougen Tang; Xiaobo Ji; Shuangyin Wang; Haiyan Wang
Source:
Journal of materials chemistry 2018 v.6 no.38 pp. 18444-18448
ISSN:
2050-7496
Subject:
air; annealing; anodes; copper; cuprous oxide; dendrites; foil; lithium
Abstract:
... Lithiophilic Cu₂O nanoparticle decorated copper foil synthesized by a facile air annealing approach was employed as a lithium plating substrate. The Cu₂O layers can stabilize lithium nucleation and alleviate the growth of lithium dendrites, thus enhancing lithium plating and stripping performance. This simple strategy is easily scalable to achieve low-cost lithium metal anodes for commercial appli ...
DOI:
10.1039/c8ta07612j

13. A general and simple method for evaluating the electrical transport performance of graphene by the van der Pauw-Hall measurement

Author:
Fangzhu Qing; Yang Shu; Linsen Qing; Yuting Niu; He Guo; Shuyi Zhang; Chunlin Liu; Changqing Shen; Wanli Zhang; Samuel S. Mao; Wenjuan Zhu; Xuesong Li
Source:
Science bulletin 2018 pp. -
ISSN:
2095-9273
Subject:
annealing; electronics; equations; graphene; transistors
Abstract:
... Expected for many promising applications in the field of electronics and optoelectronics, a reliable method for the characterization of graphene electrical transport properties is desired to predict its device performance or provide feedback for its synthesis. However, the commonly used methods of extracting carrier mobility from graphene field effect transistor or Hall-bar is time consuming, expe ...
DOI:
10.1016/j.scib.2018.10.007

14. A hidden symmetry-broken phase of MoS₂ revealed as a superior photovoltaic material

Author:
Meiling Xu; Yue Chen; Fen Xiong; Jianyun Wang; Yanhui Liu; Jian Lv; Yinwei Li; Yanchao Wang; Zhongfang Chen; Yanming Ma
Source:
Journal of materials chemistry 2018 v.6 no.33 pp. 16087-16093
ISSN:
2050-7496
Subject:
annealing; chemistry; molybdenum; molybdenum disulfide; solar cells
Abstract:
... Monolayer MoS₂ has long been considered as the most promising candidate for wearable photovoltaic devices. However, its photovoltaic efficiency is restricted by its large band gap (2.0 eV). Though the band gap can be reduced by increasing the number of layers, the indirect band gap nature of the resulting multilayer MoS₂ is unfavorable. Herein, we report a theoretical discovery of the hitherto unk ...
DOI:
10.1039/c8ta05459b

15. A high-performance aromatic co-polyimide fiber: structure and property relationship during gradient thermal annealing

Author:
Xiaona Yan; Mengying Zhang; Shengli Qi; Guofeng Tian; Hongqing Niu; Dezhen Wu
Source:
Journal of materials science 2018 v.53 no.3 pp. 2193-2207
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; annealing; glass transition temperature; heat treatment; modulus of rupture; nitrogen; spinning; thermal properties; thermogravimetry; weight loss
Abstract:
... A high-performance aromatic co-polyimide (co-PI) fiber was prepared by thermal treating the polyamic acid (PAA) precursor fiber produced through a wet spinning technique. A gradient thermal treatment protocol, which was selected based on the thermogravimetric analysis of PAA fibers, was employed for achieving the best structure and fiber performance. The structural and morphological variations of ...
DOI:
10.1007/s10853-017-1552-1

16. A hybrid algorithm based optimization on modeling of grid independent biodiesel-based hybrid solar/wind systems

Author:
Du Guangqian; Kaveh Bekhrad; Pouria Azarikhah; Akbar Maleki
Source:
Renewable energy 2018 v.122 pp. 551-560
ISSN:
0960-1481
Subject:
algorithms; annealing; batteries; biodiesel; energy; energy use and consumption; life cycle costing; models; system optimization; wind; wind power; wind turbines; Iran
Abstract:
... The main contribution of this research is formulating the size optimization of grid-independent hybrid wind/photovoltaic/biodiesel/battery systems and proposing a hybrid algorithm on this optimization problem. There are many investigations based on hybrid wind and PV power systems but the investigation on the hybrid wind/photovoltaic/biodiesel/battery system is rarely found. Here, the optimal desi ...
DOI:
10.1016/j.renene.2018.02.021

17. A multifaceted coating on titanium dictates osteoimmunomodulation and osteo/angio-genesis towards ameliorative osseointegration

Author:
Long Bai; Zhibin Du; Jingjing Du; Wei Yao; Jiaming Zhang; Zeming Weng; Si Liu; Ya Zhao; Yanlian Liu; Xiangyu Zhang; Xiaobo Huang; Xiaohong Yao; Ross Crawford; Ruiqiang Hang; Di Huang; Bin Tang; Yin Xiao
Source:
Biomaterials 2018 v.162 pp. 154-169
ISSN:
0142-9612
Subject:
angiogenesis; annealing; bone formation; coatings; crystal structure; endothelial cells; hydrophilicity; hydroxyapatite; in vitro studies; in vivo studies; inflammation; macrophages; nanoparticles; osteoblasts; oxidation; porous media; prostheses; temperature; tissue transplantation; titanium; titanium dioxide; wettability
Abstract:
... A multifaceted coating for hard tissue implants, with favorable osteogenesis, angiogenesis, and osteoimmunomodulation abilities, would be of great value since it could improve osseointegration and alleviate prosthesis loosening. However, to date there are few coatings that fully satisfy these criteria. Herein we describe a microporous TiO2 coating decorated with hydroxyapatite (HA) nanoparticles t ...
DOI:
10.1016/j.biomaterials.2018.02.010

18. A multitude of modifications strategy of ZnFe₂O₄ nanorod photoanodes for enhanced photoelectrochemical water splitting activity

Author:
Ju Hun Kim; Youn Jeong Jang; Sun Hee Choi; Byeong Jun Lee; Jeong Hun Kim; Yoon Bin Park; Chang-Mo Nam; Hyun Gyu Kim; Jae Sung Lee
Source:
Journal of materials chemistry 2018 v.6 no.26 pp. 12693-12700
ISSN:
2050-7496
Subject:
annealing; crystal structure; electric current; electrical conductivity; electrolytes; energy; hydrogen; nanorods; oxidation; oxygen; titanium dioxide
Abstract:
... Numerous modifications strategies are applied to spinel ZnFe₂O₄ nanorods with a band gap energy of ∼2.0 eV to enhance their activity as a photoanode for photoelectrochemical (PEC) water splitting. First, hybrid microwave annealing (HMA) imparts high crystallinity to ZnFe₂O₄ nanorods, while preserving the formed nanostructure and maintaining high electric conductivity of F:SnO₂ (FTO) substrate. Thi ...
DOI:
10.1039/c8ta02161a

19. A new approach to improve the electrochemical performance of ZnMn₂O₄ through a charge compensation mechanism using the substitution of Al³⁺ for Zn²⁺

Author:
Xianyu Zhu; Jingbin Quan; Jichun Huang; Zheng Ma; Yixin Chen; Decheng Zhu; Chongxing Ji; Decheng Li
Source:
RSC advances 2018 v.8 no.14 pp. 7361-7368
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum; annealing; electrochemistry; manganese; scanning electron microscopy; spray drying; zinc
Abstract:
... ZnMn₂O₄ and Zn₁₋ₓAlₓMn₂O₄ were synthesized by a spray drying process followed by an annealing treatment. Their structural and electrochemical characteristics were investigated by SEM, XRD, XPS, charge–discharge tests and EIS. XPS data indicate that the substitution of Al³⁺ for Zn²⁺ causes manganese to be in a mixed valence state by a charge compensation mechanism. Moreover, the presence of this ch ...
DOI:
10.1039/c8ra00310f

20. A new mechanism for improving electromagnetic properties based on tunable crystallographic structures of FeCoNiSiₓAl₀.₄ high entropy alloy powders

Author:
Bin Zhang; Yuping Duan; Yulong Cui; Guojia Ma; Tongmin Wang; Xinglong Dong
Source:
RSC advances 2018 v.8 no.27 pp. 14936-14946
ISSN:
2046-2069
Subject:
alloys; annealing; crystal structure; dielectric properties; entropy; grinding; permeability; powders; silica; temperature
Abstract:
... Mechanical grinding method was employed to prepare FeCoNiSiₓAl₀.₄ high entropy alloy powders, which present a simple solid solution structure (FCC and BCC). After annealing at 673 K, a large amount of BCC phase precipitate and a small amount of CoFe₂O₄ phase generate. The change of crystal structure may lead to an increase in Mₛ (from 100.3 emu g⁻¹ to 124.2 emu g⁻¹) and a decrease in Hc (from 107 ...
DOI:
10.1039/c8ra01762j