NDLI: Spectroscopic metrics allow in situ measurement of mean size and thickness of liquid-exfoliated few-layer graphene nanosheets

Content Provider	Royal Society of Chemistry (RSC)
Author	Paton, Keith R. Katsnelson, Mikhail I. Backes, Claudia Yuan, Shengjun Hanlon, Damien Smith, Ronan J. Donegan, John F. Coleman, Jonathan N. Houston, James McCloskey, David
Copyright Year	2016
Abstract	Liquid phase exfoliation is a powerful and scalable technique to produce defect-free mono- and few-layer graphene. However, samples are typically polydisperse and control over size and thickness is challenging. Notably, high throughput techniques to measure size and thickness are lacking. In this work, we have measured the extinction, absorption, scattering and Raman spectra for liquid phase exfoliated graphene nanosheets of various lateral sizes (90 ≤ 〈L〉 ≤ 810 nm) and thicknesses (2.7 ≤ 〈N〉 ≤ 10.4). We found all spectra to show well-defined dependences on nanosheet dimensions. Measurements of extinction and absorption spectra of nanosheet dispersions showed both peak position and spectral shape to vary with nanosheet thickness in a manner consistent with theoretical calculations. This allows the development of empirical metrics to extract the mean thickness of liquid dispersed nanosheets from an extinction (or absorption) spectrum. While the scattering spectra depended on nanosheet length, poor signal to noise ratios made the resultant length metric unreliable. By analyzing Raman spectra measured on graphene nanosheet networks, we found both the D/G intensity ratio and the width of the G-band to scale with mean nanosheet length allowing us to establish quantitative relationships. In addition, we elucidate the variation of 2D/G band intensities and 2D-band shape with the mean nanosheet thickness, allowing us to establish quantitative metrics for mean nanosheet thickness from Raman spectra.
Starting Page	4311
Ending Page	4323
Page Count	13
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	8
Issue Number	7
Journal	Nanoscale
DOI	10.1039/c5nr08047a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dispersity Nanosheet Graphene Raman
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Size-dependent propagation of Au nanoclusters through few-layer graphene

Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets.

Ferromagnetism in exfoliated tungsten disulfide nanosheets

Ferromagnetism in exfoliated tungsten disulfide nanosheets.

Modifying the Size of Ultrasound-Induced Liquid-Phase Exfoliated Graphene: From Nanosheets to Nanodots

Controlled Size Reduction of Liquid Exfoliated Graphene Micro-Sheets via Tip Sonication

Layer-by-layer Assembly of Nanosheets with Matching Size and Shape for More Stable Membrane Structure than Nanosheet-Polymer Assembly

Formation of monolayer and few-layer hexagonal boron nitride nanosheets via surface segregation

Novel PEG functionalized graphene nanosheets: enhancement of dispersibility and thermal stability

Spectroscopic metrics allow in situ measurement of mean size and thickness of liquid-exfoliated few-layer graphene nanosheets

Similar Documents

Size-dependent propagation of Au nanoclusters through few-layer graphene

Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets.

Ferromagnetism in exfoliated tungsten disulfide nanosheets

Ferromagnetism in exfoliated tungsten disulfide nanosheets.

Modifying the Size of Ultrasound-Induced Liquid-Phase Exfoliated Graphene: From Nanosheets to Nanodots

Controlled Size Reduction of Liquid Exfoliated Graphene Micro-Sheets via Tip Sonication

Layer-by-layer Assembly of Nanosheets with Matching Size and Shape for More Stable Membrane Structure than Nanosheet-Polymer Assembly

Formation of monolayer and few-layer hexagonal boron nitride nanosheets via surface segregation

Novel PEG functionalized graphene nanosheets: enhancement of dispersibility and thermal stability

Spectroscopic metrics allow in situ measurement of mean size and thickness of liquid-exfoliated few-layer graphene nanosheets