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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >D-glucosamine chitosan base molecule-assisted synthesis of different shape and sized silver nanoparticles by a single pot method: A greener approach for sensor and microbial applications
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D-glucosamine chitosan base molecule-assisted synthesis of different shape and sized silver nanoparticles by a single pot method: A greener approach for sensor and microbial applications

机译：D-葡萄糖胺壳聚糖基部分子通过单壶方法辅助合成不同形状和尺寸的银纳米颗粒：传感器和微生物应用的更环保方法

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摘要

Silver nanoparticle was synthesized using D-glucosamine chitosan base as green reducing agent at elevated temperature in alkaline pH ranges. The excess of D-glucosamine chitosan base was used as it is both stabilizing and reducing agent at different pHs, regulates the shape and size of the silver nanoparticles. The progressive growth of silver nanoparticles was monitored by UV-Visible spectral studies. A sharp peak at 420 nm indicates the formation of spherical silver nanoparticles. The size and shape of silver nanoparticles were observed from Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) methods. The anisotropically grown nanoparticles were used as probe for Surface Enhanced Raman Studies (SERS) using ATP (4-aminothiophenol) as a model system. The catalytic behavior of silver nanoparticles was exploited for 4-nitrophenol reduction and observed that the reduction reaction follows pseudo first order kinetics with a rate constant 0.65 min. The antibacterial activity of silver nanoparticles was also tested for both gram-positive and-negative microorganisms, in which higher zone of inhibition was observed for gram negative microorganism. (C) 2019 Published by Elsevier B.V.
机译：在碱性pH范围内的升高温度下，使用D-葡糖胺壳聚糖基碱作为绿色还原剂合成银纳米粒子。使用过量的D-葡糖胺壳聚糖碱，因为它在不同的pH中稳定和还原剂，调节银纳米颗粒的形状和尺寸。通过UV可见光光谱研究监测银纳米粒子的逐步生长。 420nm处的尖峰表示球形银纳米颗粒的形成。从扫描电子显微镜（SEM）和透射电子显微镜（TEM）方法中观察银纳米粒子的尺寸和形状。各向异性生长的纳米颗粒用作使用ATP（4-氨基酚苯酚）作为模型系统的表面增强拉曼研究（SERS）的探针。利用银纳米粒子的催化行为进行4-硝基苯酚还原，并观察到减少反应遵循伪序的速率恒定0.65分钟。还测试了银纳米粒子的抗菌活性，用于革兰氏阳性和阴性微生物，其中观察到革兰氏阴性微生物的较高抑制区。 （c）2019年由elestvier b.v发布。

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