Synergistically enhanced thermoelectric performance by optimizing the composite ratio between hydrothermal Sb2Se3 and self-assembled β-Cu2Se nanowires

CrystEngComm ◽  
2021 ◽  
Author(s):  
Minsu Kim ◽  
Dabin Park ◽  
Jooheon Kim
Keyword(s):  
Self Assembly ◽  
Hydrothermal Reaction ◽  
Thermoelectric Performance ◽  
Water Evaporation ◽  
Assembly Method ◽  
Evaporation Induced Self Assembly ◽  
Self Assembled

Sb2Se3 and β-Cu2Se nanowires were synthesized via hydrothermal reaction and a water-evaporation induced self-assembly method, respectively, and a 70%-Sb2Se3 and 30%-β-Cu2Se disk pellet shows enhanced thermoelectric performance.

In-Situ Visualization of Evaporation Induced Self-Assembly Phenomena of Nanofluids Detecting the Interfacial Surface Plasmon Reflectance

2015 ◽  
Author(s):  
Iltai (Isaac) Kim ◽  
Kenneth David Kihm
Keyword(s):  
Refractive Index ◽  
Real Time ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Effective Refractive Index ◽  
In Situ Visualization ◽  
Evaporation Induced Self Assembly ◽  
Self Assembled ◽  
Mapping Techniques

Innovative optical techniques based on nano-biophotonics such as surface plasmon resonance (SPR) imaging and R-G-B natural fringe mapping techniques are developed to characterize the transport and optical properties of nanofluids in situ, real-time, and full field manner. Recent results regarding the characterization of nanofluids are summarized and future research directions are presented. 47 nm Al2O3 nanoparticles are dispersed in water with various concentrations. Al2O3 nanofluids droplets are placed on substrates and evaporated in room temperature. In-situ visualization of evaporation-induced self-assembly is conducted to detect concentration, effective refractive index, and different self-assembled pattern including cavity with various nanofluids concentrations and surface hydrophobbicities with SPR and fringe mapping. During the evaporation, time-dependent and near-field nanoparticle concentrations are determined by correlating the SPR reflectance intensities with the effective refractive index (ERI) of the nanofluids. With increasing the concentrations of nanofluids, the existence of hidden complex cavities inside a self-assembled nanocrystalline structure or final dryout pattern is discovered in real-time. R-G-B natural fringe mapping allowed the reconstruction of the 3D cavity formation and crystallization processes quantitatively. The formation of the complex inner structure was found to be attributable to multiple cavity inceptions and their competing growth during the aquatic evaporation. Furthermore, the effect of surface hydrophobicity is examined in the formation of hidden complex cavities, taking place on three different substrates bearing different levels of hydrophobicity; namely, cover glass (CG), gold thin film (Au), and polystyrene dish (PS). These surface plamson resonance imaging and natural fringe mapping techniques are expected to provide a breakthrough in micro-nanoscale thermal fluids phenomena and nano-biochemical sensing when coupled with localized surface Plasmon and metamaterials techniques.

Facile synthesis of mesoporous ZnAl2O4 thin films through the evaporation-induced self-assembly method

2009 ◽  
Vol 488 (1) ◽  
pp. 320-324 ◽  
Author(s):  
Xiqiang Tian ◽  
Lijuan Wan ◽  
Kai Pan ◽  
Chungui Tian ◽  
Honggang Fu ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Facile Synthesis ◽  
Assembly Method ◽  
Evaporation Induced Self Assembly

Methane Dry Reforming over Coke-Resistant Mesoporous Ni-Al2O3Catalysts Prepared by Evaporation-Induced Self-Assembly Method

ChemCatChem ◽  
2015 ◽  
Vol 7 (22) ◽  
pp. 3753-3762 ◽  
Author(s):  
Xiuzhong Fang ◽  
Cheng Peng ◽  
Honggen Peng ◽  
Wenming Liu ◽  
Xianglan Xu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Dry Reforming ◽  
Methane Dry Reforming ◽  
Assembly Method ◽  
Evaporation Induced Self Assembly

scholarly journals Hydrogenolysis of Glycerol on the ZrO2-TiO2 Supported Pt-WOx Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 312 ◽  
Author(s):  
Zhiwen Xi ◽  
Zhe Hong ◽  
Fangtao Huang ◽  
Zhirong Zhu ◽  
Wenzhi Jia ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Self Assembly ◽  
Catalyst Surface ◽  
Acid Sites ◽  
Acidic Properties ◽  
Lewis Acid Sites ◽  
Molar Ratios ◽  
Assembly Method ◽  
Evaporation Induced Self Assembly ◽  
Glycerol Hydrogenolysis

A series of Pt/WOx-ZrO2-TiO2 catalysts with different Ti/Zr molar ratios was prepared by an evaporation induced self-assembly method, and used to efficient hydrogenolysis of glycerol to 1-PO and 1,3-PDO. BET, XRD, Raman, TEM, XPS and Py-IR were employed to characterize the physicochemical properties of the catalysts. The structural and acidic properties of the catalysts were affected by the Ti/Zr ratio of the support ZrO2-TiO2. Two new crystalline phases of ZrTiO4 and Ti2ZrO6 and the amount of acid sites were detected in the Pt/WOx-ZrO2-TiO2 catalysts. 1-PO is dominant in all products of glycerol hydrogenolysis over the supported Pt-WOx catalysts, which is attributed to more Lewis acid sites on the catalyst surface. The Pt/WOx-ZrO2-TiO2 catalyst with a Ti/Zr ratio of 7/3 showed the highest 1,3-PDO yield (25.3%) and 1-PO yield (42.3%), due to its more acid sites including Brønsted and Lewis, and higher concentration of surface Pt0.

scholarly journals A simple approach to prepare self-assembled, nacre-inspired clay/polymer nanocomposites

Soft Matter ◽  
2020 ◽  
Vol 16 (23) ◽  
pp. 5497-5505 ◽  
Author(s):  
P. Xu ◽  
T. Erdem ◽  
E. Eiser
Keyword(s):  
Polymer Nanocomposites ◽  
Hierarchical Structure ◽  
Self Assembly ◽  
Simple Approach ◽  
Water Evaporation ◽  
Assembly Process ◽  
Inorganic Nanocomposites ◽  
Self Assembled ◽  
The Relationship

Inspired by the relationship between the ordered architecture of aragonite crystals and biopolymers found in natural nacre, we present a facile strategy to construct organic/inorganic nanocomposites with hierarchical structure via a water-evaporation driven self-assembly process.

scholarly journals Improving the Wear Life of a-C:H Film in High Vacuum by Self-Assembled Reduced Graphene Oxide Layers

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1733 ◽  
Author(s):  
Hui Song ◽  
Gang Chen ◽  
Jie Chen ◽  
Hongxuan Li ◽  
Li Ji ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
High Vacuum ◽  
Carbon Film ◽  
Friction Reduction ◽  
Friction Behavior ◽  
Assembly Method ◽  
Reduced Graphene ◽  
Self Assembled

As an energy-efficient surface modification method, self-assembly has been the subject of extensive research. However, its application on carbon film has been rarely reported. In the present work, a novel self-assembled reduced graphene oxide (RGO) was prepared on a-C:H film by a controllable self-assembly method, and the friction behavior of the RGO/a-C:H film was investigated under vacuum environment. Interestingly, the RGO/a-C:H film exhibited significant improvement of anti-wear ability in vacuum conditions under a high applied load of 5 N. As expected, the synergy lubrication effect of the RGO layer and a-C:H film should account for the excellent friction reduction and anti-wear ability of a RGO/a-C:H multilayer film.

Assembling ultra-thick and crack-free colloidal crystals via an isothermal heating evaporation induced self-assembly method

2012 ◽  
Vol 358 (12-13) ◽  
pp. 1611-1616 ◽  
Author(s):  
Qingsong Jiang ◽  
Chan Li ◽  
Shugang Shi ◽  
Degang Zhao ◽  
Lun Xiong ◽  
...  
Keyword(s):  
Self Assembly ◽  
Colloidal Crystals ◽  
Isothermal Heating ◽  
Assembly Method ◽  
Evaporation Induced Self Assembly

Preparation, Characterization, and Photocatalytic Performance of Bismuth and Boron Co-Doped Mesporous TiO2 by EISA Method

2014 ◽  
Vol 953-954 ◽  
pp. 1003-1007
Author(s):  
Yu Xiu Zhang ◽  
Li Yang ◽  
Dai Mei Chen ◽  
Shuang Deng ◽  
Ying Jie Shi
Keyword(s):  
Visible Light ◽  
Self Assembly ◽  
Photocatalytic Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Assembly Method ◽  
Transmission Electron ◽  
Evaporation Induced Self Assembly ◽  
Crystallite Sizes ◽  
Mesoporous Structures

Abstract. The large-pore mesoporous Bi-B-TiO2 nanoparticles with the different Bi/Ti rations were prepared by EISA(evaporation-induced self-assembly) method. The prepared catalysts were characterized by X-ray diffraction, transmission electron microscopy, N2 absorption-desorption, ultraviolet visible light spectroscopy and photoluminescence spectroscopy technologies. The results revealed that all the samples are large aperture mesoporous structures. The crystallite sizes were in the range7-11nm, as confirmed by the results obtained from TEM images. The photodecomposition experiments showed that the photodegradation activity of Bi-B-doped TiO2 was higher than that of undoped TiO2 in degradation of 2, 4–dichlorophenol under visible light irradiation.

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