scholarly journals Universal one-pot, one-step synthesis of core-shell nanocomposites with self-assembled tannic acid shell and their antibacterial and catalytic activities

2017 ◽  
Vol 135 (6) ◽  
pp. 45829 ◽  
Author(s):  
Yan Fang ◽  
Jiajun Tan ◽  
Tian Lan ◽  
Stanley Guo Feng Foo ◽  
Do Gi Pyun ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Core Shell ◽  
One Pot ◽  
Catalytic Activities ◽  
One Step ◽  
Self Assembled

scholarly journals Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles (AgNPs-Shell) and their Antimicrobial and Ultra-high Catalytic Properties

2021 ◽  
Author(s):  
Azam Ali ◽  
Mehrukh Zehravi ◽  
Muhammad Humble Khalid Treen ◽  
Jiri Militky ◽  
Fiaz Hussain ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Tannic Acid ◽  
Large Scale ◽  
Catalytic Properties ◽  
Average Particle Size ◽  
Colloidal Dispersion ◽  
Alkaline Condition ◽  
Core Shell ◽  
Average Particle ◽  
One Pot

The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of AgNPs was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized AgNPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) AgNPs, capped with poly-tannic acid (AgNPs-PTA). The average particle size of AgNPs-PTA was found 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed stable for more than 15 months in the ambient environment (25 oC, 65 % relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus Escherichia coli. Ag-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s-1·mg-1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and biomedical.

One-step construction of core/shell nanoarrays with a holey shell and exposed interfaces for overall water splitting

2019 ◽  
Vol 7 (3) ◽  
pp. 1196-1205 ◽  
Author(s):  
Qingliang Lv ◽  
Lei Yang ◽  
Wei Wang ◽  
Siqi Lu ◽  
Tianen Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Synergistic Effects ◽  
Core Shell ◽  
Catalytic Activities ◽  
Overall Water Splitting ◽  
Conductive Substrate ◽  
One Step

The Ni3S2/VO2 core/shell nanoarray exhibits outstanding catalytic activities rendered by the synergistic effects of 1D morphology, enriched holes, exposed interfaces and conductive substrate.

Synthesis of Self-assembled Magnetite (Fe3O4) Chain-like Core–Shell Nanowires by a Facile One-step Process

2011 ◽  
Vol 40 (1) ◽  
pp. 66-67
Author(s):  
Junyan Gong ◽  
Xiaobo Zhang ◽  
Dongen Zhang ◽  
Tianlin Zhang ◽  
Zhiwei Tong
Keyword(s):  
Core Shell ◽  
Step Process ◽  
Magnetite Fe3o4 ◽  
One Step ◽  
Self Assembled ◽  
Shell Nanowires

Facile One-Pot Synthesis of Self-Assembled Silver@Polypyrrole Core/Shell Nanosnakes

Small ◽  
2008 ◽  
Vol 4 (9) ◽  
pp. 1301-1306 ◽  
Author(s):  
David Muñoz-Rojas ◽  
Judith Oró-Solé ◽  
Omar Ayyad ◽  
Pedro Gómez-Romero
Keyword(s):  
Core Shell ◽  
One Pot ◽  
One Pot Synthesis ◽  
Self Assembled

Green Fabrication of Hydrogel-Immobilized Au@Ag Nanoparticles Using Tannic Acid and Application in Catalysis

2021 ◽  
Author(s):  
Hengxi He ◽  
Didier Astruc ◽  
Haibin Gu
Keyword(s):  
Tannic Acid ◽  
Ag Nanoparticles ◽  
Core Shell ◽  
Step Method ◽  
Shell Nanoparticles ◽  
Active Core ◽  
Catalytically Active ◽  
One Step ◽  
Core Shell Nanoparticles

Highly catalytically active core-shell nanoparticles (NPs) have attracted great attention towards applications. Herein, core-shell Au@AgNPs were simply obtained via a green and cheap one-step method using tannic acid (TA) as...

scholarly journals Synthesis of self-assembled nacre-like materials with 3D periodic layers from nanochitin via hydrogelation and mineralization

2021 ◽  
Author(s):  
Junhua Xu ◽  
Liang Liu ◽  
Juan Yu ◽  
Yujun Zou ◽  
Wenhui Pei ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Mechanical Performance ◽  
Light Transmission ◽  
One Pot ◽  
Biomedical Material ◽  
Directional Diffusion ◽  
Brick And Mortar ◽  
One Step ◽  
Self Assembled ◽  
Periodic Materials

Abstract Here introduced a route for the synthesis of 3D structures that display a mechanical strength that competes with that of the toughest materials found in nature. Following the “brick-and-mortar” biomineralization typical of nacre, self-stratified, periodic materials are obtained by one-step ion diffusion gradient and hydrogelation of nanochitin with simultaneous mineral coprecipitation. Specifically, under appropriate electrolyte conditions, hydroxyapatite (HA) microspheres grow in an organic network formed from partially deacetylated chitin nanofibers (NCh), resulting in periodic stacking of mineralized (HA) and non-mineralized (NCh) layers. By directional diffusion, customizable 3D shapes are self-assembled and demonstrated to function as optical waveguides with selective light transmission at interfaces. Upon hot pressing, the resulting solid structures exhibit a superb mechanical performance while being biocompatible (tested with chondrogenic ATDC5 cells as a model for physiological mineralization). Overall, a shape-controlled, one-pot biomineralization method was proposed that achieves hierarchical, periodic and strong “nacre-like” structures suitable as biomedical material.

scholarly journals One-pot one-step synthesis of Au@SiO2 core–shell nanoparticles and their shell-thickness-dependent fluorescent properties

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17674-17678 ◽  
Author(s):  
Shan Zhang ◽  
Xiaochuan Xu ◽  
Guoyu Zhang ◽  
Bin Liu ◽  
Jianhui Yang
Keyword(s):  
Shell Thickness ◽  
Silica Shell ◽  
Core Shell ◽  
Core Size ◽  
Fluorescent Properties ◽  
Step Method ◽  
Shell Nanoparticles ◽  
One Pot ◽  
One Step ◽  
Core Shell Nanoparticles

Au@SiO2 core–shell nanoparticles with tunable Au core size and silica shell thickness were prepared by a facile one-pot one-step method.

One-step facile synthesis of Au@copper–tannic acid coordination core–shell nanostructures as photothermally-enhanced ROS generators for synergistic tumour therapy

2020 ◽  
Vol 44 (44) ◽  
pp. 19262-19269
Author(s):  
Yanhong Liu ◽  
Qingyang Shi ◽  
Yan Zhang ◽  
Jili Jing ◽  
Jin Pei
Keyword(s):  
Tannic Acid ◽  
Ros Generation ◽  
Core Shell ◽  
Facile Synthesis ◽  
Coordination Core ◽  
Tumour Therapy ◽  
Shell Nanostructures ◽  
One Step ◽  
Good Biocompatibility

Au@TACu core–shell nanostructures with good biocompatibility and GSH-depleting capability showed enhanced photothermal performance and ROS generation for synergistic tumour therapy.

One-step reactivity-driven synthesis of core–shell structured electrically conducting particles for biomedical applications

2016 ◽  
Vol 4 (32) ◽  
pp. 5429-5436 ◽  
Author(s):  
Jifu Mao ◽  
Ze Zhang
Keyword(s):  
Emulsion Polymerization ◽  
Biomedical Applications ◽  
Core Shell ◽  
One Pot ◽  
Electrically Conducting ◽  
One Step ◽  
The Difference ◽  
Shell Particles

A simple one-pot and one-step emulsion polymerization of conductive and functional core–shell particles is reported, based on the difference in reactivity between pyrrole and its derivative.

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