相关实验视频

Updated: Jul 25, 2025

Synthesis of Multi-walled Carbon Nanotubes Modified with Silver Nanoparticles and Evaluation of Their Antibacterial Activities and Cytotoxic Properties

Synthesis of Multi-walled Carbon Nanotubes Modified with Silver Nanoparticles and Evaluation of Their Antibacterial Activities and Cytotoxic Properties

Published on: May 10, 2018

Psidium guajava 叶子提取物介导银纳米颗粒的绿色合成及其在抗菌涂层中的应用

Md Johurul Islam¹, Nazia Khatun¹, Riyadh Hossen Bhuiyan²

¹Industrial Physics Division, BCSIR Dhaka Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR) Dhaka-1205 Bangladesh suraviislambcsir@gmail.com suravii@yahoo.com.

|June 26, 2023

概括

绿色合成的银纳米粒子 (AgNPs) 使用Psidium瓜叶提取物导致有效的抗菌剂. 这些环保纳米颗粒显示出在织品中的抗菌涂层的前景.

科学领域:

纳米技术纳米技术
材料科学材料科学材料科学
绿色化学绿色化学

背景情况:

银纳米粒子 (AgNPs) 具有强大的抗菌特性.
开发AgNP的环保合成方法对于可持续的应用至关重要.
瓜 (guava) 叶提取物含有具有降低和限制潜力的生物分子.

研究的目的:

使用Psidium瓜叶提取物合成银纳米粒子 (AgNPs).
用各种分析技术来描述合成的绿色AgNP.
研究合成的AgNP对细菌菌株的抗菌活性.

主要方法:

绿色合成AgNPs使用Psidium瓜亚瓦叶提取物.
通过UV-Vis光谱,FTIR,XRD和FE-SEM进行表征.
针对金黄色葡萄球菌和大肠杆菌的抗菌分析.

主要成果:

紫外线-Vis光谱学证实了AgNP的形成,表面等离子体共振峰值在430nm.
FTIR分析表明,叶子提取物中的生物分子起到了减少和封闭剂的作用.
XRD显示了一个立方体结构,FE-SEM显示了球形纳米粒子,平均尺寸为~12纳米.
合成的AgNP表现出显著的抗菌活性,对抗阳性和阴性细菌.

结论:

松 (Psidium guajava) 叶片提取物有助于经济高效,环保和可持续的AgNP合成.
绿色合成的AgNP具有显著的抗菌特性.
这些发现表明,绿色AgNP在抗菌织涂料中的潜在应用.

更多相关视频

Author Spotlight: Metallic Nanocomposites to Eliminate Antibiotic-Resistant Bacteria

Author Spotlight: Metallic Nanocomposites to Eliminate Antibiotic-Resistant Bacteria

Published on: October 4, 2024

Author Spotlight: Exploring the Antibacterial Effects of Zinc Oxide Nanoparticles in Overcoming Antibiotic Resistance

Author Spotlight: Exploring the Antibacterial Effects of Zinc Oxide Nanoparticles in Overcoming Antibiotic Resistance

Published on: September 27, 2024

相关概念视频

Hand hygiene

Hand hygiene

Asepsis is the practice of preventing or breaking the chain of infection. The nurse employs aseptic techniques to prevent the spread of microorganisms and reduce the risk of diseases. Hand hygiene is the cornerstone of aseptic techniques and is classified into medical and surgical asepsis. Medical asepsis includes hand hygiene and the use of gloves. Surgical asepsis, or the sterile technique, refers to practices that render and keep objects and areas free of microorganisms.
Hand washing...

Colloidal precipitates

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...