GB/T 24369.3-2017 in English

VALID

Characterization of gold nanorods. Part 3: Measurement method of surface charge density

Issued on:2017-07-31
Implemented on:2018-02-01
File Format:PDF
Delivery:Within 1 day

Price(USD)： $176.00
$171.00

Standard No:	GB/T 24369.3-2017
Document status:	VALID
Title in English:	Characterization of gold nanorods. Part 3: Measurement method of surface charge density
Title in Chinese:	金纳米棒表征第3部分：表面电荷密度测量方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Within 1 day
Issued on:	2017-07-31
Implemented on:	2018-02-01
ICS Classification:	17.220.20-Measurement of electrical and magnetic quantities
Chinese Classification:	N04-Basic standards and general methods
Professional Classification:	GB-National Standard
Related Keywords:	measurement surface charge density surface charge density surface charge density introduction gold nanorods standard formulation gold nanorods
Related Topics:	Density measurement surface charge Nano gold surface high-density nanophase Characteristic peaks of gold nanoparticles gold nanorods Methods for Characterizing Gold Nanomaterials comprehensive characterization Density measurement charge density surface charge density nano-characterization and surface charge nano characterization Phase Characterization Method Aspect gold nanoparticles gold nano gold gauge Temperature Characterization Method Measurement of Charge Density Characterization of Gold Nanomaterials surface charge density Surface Characterization Methods Density measurement method surface charge density Apparent Density Measurement Method Atmospheric charge density nano characterization internal representation Partially charged Charge Density Measurement Is measurement the same as characterization? Gold surface energy measurement gold surface energy Assay Characterization GB/T 24369.3 GB/T 24369.3-2017 Battery slurry fineness characterization method Characterization methods of peptides Hardness characterization method Gold Density Measurement Method Fabric charge area density Charge area density Hardness characterization method Amorphous characterization methods Macropore characterization methods Alloy Characterization Methods High-throughput characterization methods Characterization methods of gold-sulfur bonds Characterization methods of silicon quantum dots Method for determination of surface bile acid density What are the methods for measuring surface bile acid density? Surface charge density of gold nanorods

《GB/T 24369.3-2017金纳米棒表征第3部分：表面电荷密度测量方法》由TC279（全国纳米技术标准化技术委员会）归口，主管部门为中国科学院。

Introduction

1. Background and significance of standard formulation

Gold nanorods are an important nanomaterial with broad application prospects in the fields of biological detection and disease diagnosis. In order to accurately evaluate the stability of its colloidal solution and its interaction with other substances, GB/T 24369 "Characterization of Gold Nanorods" is divided into three parts. This part (Part 3) focuses on the measurement method of surface charge density.

2. Principle of surface charge density measurement

Surface charge density is an important parameter calculated indirectly through zeta potential. According to the classical double layer model (Gouy-Chapman-Stern model), the surface potential of the particle and the electrolyte ion strength jointly determine the surface charge density.

Parameter name	Definition	Calculation formula
Ionic strength (I)	A comprehensive measure of the concentration of all ions in the solution	$$ I = \frac{\sum c_{i}Z_{i}^{2}}{2} $$
Debye length (κ⁻¹)	Thickness of the double layer	$$ κ^{-1} = \frac{0.304}{\sqrt{I}} $$

3. Measurement instruments and methods

zeta potential meter is the core instrument for measuring surface charge density. The electrophoretic light scattering method can accurately determine the zeta potential value of gold nanorods, and the surface charge density can be calculated by combining the formula.

4. Implementation suggestions and precautions

Sample pretreatment: Ensure that the concentration of the test sample is within the measurement range of the instrument and use the same medium for dilution.
Measurement conditions: Parameters such as temperature and equilibrium time must be strictly controlled. It is recommended to refer to the experimental conditions in Appendix A and B.
Data processing: For small zeta potential values (<50mV), it is preferred to use the simplified formula (Formula 6) for calculation.

More samples: GB 18306-2015 DL/T 5154-2012 JC/T 2453-2018

Sample only — not a preview of GB/T 24369.3-2017

Loading PDF document...

Error loading PDF. Please make sure the file is valid and try again.