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Graphene layer number characterization using scanning kelvin probe force microscopy

NOPR - NISCAIR Online Periodicals Repository

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Field Value
 
Title Graphene layer number characterization using scanning kelvin probe force microscopy
 
Creator Toutam, Vijay Kumar
 
Subject Metrology
NMI
NPL
BIS
VAMAS
Graphene
AFM
KPFM
 
Description 1145-1150
As the importance of material surfaces and interfaces for industrial applications is ever increasing, a need for accurate measurement of their properties and functionalities with traceability and reproducibility through unbroken chain of measurements and their reference materials for proficiency testing has become very important. Carbon and its allotropes have several industrial applications and recently graphene which is a two dimensional layered material of carbon has proven to have great potential, and its characterization for layer number has become very important. A need for quantitative measurement apart from existing qualitative techniques is very much required for accurate determination of layer number. Under the aegis of Versailles Project on Advanced Materials and Standards (VAMAS), technical working area (TWA-2) an international round robin test is conducted among 13 laboratories for establishing a protocol for accurate measurement of graphene layer number and generating reference material. CSIR-NPL being NMI of India participated and contributed to the project which got recognition from VAMAS for its participation. Scanning Kelvin Probe Force Microscopy (SKPFM) of graphene layers on Au/SiO2/Si and SiO2/Si substrates is performed and their CPD data is compared. Graphene on Au/SiO2/Si has shown consistent CPD data for different modulation voltages with least uncertainty. From the comparative analysis it is found that SKPFM has potential to be an international standard technique to determine graphene layer number and can generate certified reference material.
 
Date 2021-02-22T08:26:59Z
2021-02-22T08:26:59Z
2020-12
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/56258
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJEMS Vol.27(6) [December 2020]