Surface gradient diffusion S doping of CuCo2O4 microflowers by an in situ topotactic engineering strategy for CO2 photoreduction

The development of efficient and stable photocatalyst to solve environmental issues is essential and remains a big challenge. In this work, flower-like CoNiFe-LDH is deposited in situ on g-C3N4 nanosheets,...

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Structure and Deformation of Gradient Metal Foams Produced by Machining

Volume 2: Processes; Materials ◽

10.1115/msec2019-2980 ◽

2019 ◽

Author(s):

H. Qiao ◽

T. G. Murthy ◽

C. Saldana

Keyword(s):

Aluminum Foam ◽

Mechanical Performance ◽

Metal Foams ◽

Aluminum Foams ◽

Open Cell ◽

Computed Tomographic ◽

Surface Gradient ◽

Structure Changes

Abstract The effects of surface structure on mechanical performance for open-cell aluminum foam specimens was investigated in the present study. A surface gradient for pore structure and diameter was introduced into open cell aluminum foams by machining-based processing. The structure changes in the strut and pore network were evaluated by computed tomography characterization. The role of structure gradients in affecting mechanical performance was determined using digital volume correlation and in situ compression within the computed tomographic scanner. These preliminary results show that the strength of these materials may be enhanced through surface structural gradients.

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Oriented Built-in Electric Field Introduced by Surface Gradient Diffusion Doping for Enhanced Photocatalytic H2 Evolution in CdS Nanorods

Nano Letters ◽

10.1021/acs.nanolett.7b01147 ◽

2017 ◽

Vol 17 (6) ◽

pp. 3803-3808 ◽

Cited By ~ 95

Author(s):

Hengming Huang ◽

Baoying Dai ◽

Wei Wang ◽

Chunhua Lu ◽

Jiahui Kou ◽

...

Keyword(s):

Electric Field ◽

H2 Evolution ◽

Cds Nanorods ◽

Surface Gradient ◽

Gradient Diffusion ◽

Photocatalytic H2 Evolution

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In situ extracting organic-bound calcium: A novel approach to mitigating organic fouling in forward osmosis treating wastewater via gradient diffusion thin-films

Water Research ◽

10.1016/j.watres.2019.03.018 ◽

2019 ◽

Vol 156 ◽

pp. 102-109 ◽

Cited By ~ 6

Author(s):

Ling Li ◽

Xinhua Wang ◽

Ming Xie ◽

Zhiwei Wang ◽

Xiufen Li ◽

...

Keyword(s):

Thin Films ◽

Forward Osmosis ◽

Gradient Diffusion ◽

Novel Approach ◽

Organic Fouling

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Structure and Deformation of Gradient Metal Foams Produced by Machining

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4043768 ◽

2019 ◽

Vol 141 (7) ◽

Cited By ~ 3

Author(s):

Haipeng Qiao ◽

Tejas G. Murthy ◽

Christopher Saldana

Keyword(s):

Aluminum Foam ◽

Mechanical Performance ◽

Metal Foams ◽

Aluminum Foams ◽

Open Cell ◽

Computed Tomographic ◽

Surface Gradient ◽

Structure Changes

The effects of surface structure on mechanical performance for open-cell aluminum foam specimens were investigated in the present study. A surface gradient for pore structure and diameter was introduced into open-cell aluminum foams by machining-based processing. The structure changes in the strut and pore network were evaluated by computed tomography characterization. The role of structure gradients in affecting mechanical performance was determined using digital volume correlation and in situ compression within the computed tomographic scanner. These preliminary results show that the strength of these materials may be enhanced through surface structural gradients.

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Study on TaC Reinforced Iron Matrix Surface Gradient Composites Produced In Situ

Materials Science Forum ◽

10.4028/www.scientific.net/msf.848.38 ◽

2016 ◽

Vol 848 ◽

pp. 38-42 ◽

Cited By ~ 2

Author(s):

Na Na Zhao ◽

Yun Hua Xu ◽

Ke Song ◽

Liu Liu Shen ◽

V.E. Ovcharenko

Keyword(s):

Volume Fraction ◽

Tantalum Carbide ◽

Ceramic Layer ◽

Wear Testing ◽

Micro Hardness ◽

Iron Matrix ◽

Surface Gradient ◽

Matrix Surface ◽

Dense Ceramic

Tantalum carbide (TaC) gradient composites were fabricated via in-situ fabrication method from the tantalum plate and gray cast iron. The morphology, phase constituents, micro-hardness, and relative abrasion resistance of the composites were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), micro-hardness tester and abrasive wear testing machine. The surface layer, which was ~160μm thick, was dense ceramic layer composed by ~90% submicron TaC particulates. The highest micro-hardness value of the dense ceramic layer was 13.84 GPa. In the sub-layer, the gradient distribution of TaC particulates reflected in the volume fraction decreased from 90% to 0%. While the micro-hardness value decreased from 10.81 GPa to 4.10 GPa. The metallurgical combination of the interface between the composites and matrix was perfect. The wear resistance of TaC reinforced iron matrix surface gradient composites increased significantly.

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A Controlled Release Codelivery System of MSCs Encapsulated in Dextran/Gelatin Hydrogel with TGF-β3-Loaded Nanoparticles for Nucleus Pulposus Regeneration

Stem Cells International ◽

10.1155/2016/9042019 ◽

2016 ◽

Vol 2016 ◽

pp. 1-14 ◽

Cited By ~ 11

Author(s):

Yibo Gan ◽

Sukai Li ◽

Pei Li ◽

Yuan Xu ◽

Liyuan Wang ◽

...

Keyword(s):

Controlled Release ◽

Nucleus Pulposus ◽

Release Kinetics ◽

Double Emulsion ◽

Plga Nanoparticles ◽

Gelatin Hydrogel ◽

Engineering Strategy ◽

A Cell

Mesenchymal stem cell- (MSC-) based therapy is regarded as a potential tissue engineering strategy to achieve nucleus pulposus (NP) regeneration for the treatment of intervertebral disc degeneration (IDD). However, it is still a challenge to induce MSC differentiation in NP-like cells when MSCs are implanted into the NP. The purpose of this study was to construct poly(D,L-lactide-co-glycolide) (PLGA) nanoparticles as carriers for TGF-β3 controlled release and establish a codelivery system of a dextran/gelatin hydrogel with the nanoparticles for long-term processing of discogenesis differentiation. TGF-β3-loaded PLGA nanoparticles were prepared by the double-emulsion solvent evaporation method and seeded uniformly into the hydrogel. Morphological observations, an assessment of the release kinetics of TGF-β3, a cytotoxic assay, a cell proliferation test, a biochemical content assay, qRT-PCR, and immunohistological analyses of the codelivery system were conducted in the study. The results showed that the TGF-β3-loaded nanoparticles could release TGF-β3 gradually. The codelivery system exhibited favorable cytocompatibility, and the TGF-β3 that was released could induce MSCs to NP-like cells while promoting ECM-related biosynthesis. These results suggest this codelivery system may be employed as a promising carrier for discogenesis of MSCsin situ.

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