Subdiffraction-Limited Far-Field Raman Spectroscopy of Single Carbon Nanotubes: An Unenhanced Approach

ACS Nano ◽  
2011 ◽  
Vol 5 (2) ◽  
pp. 1033-1041 ◽  
Author(s):  
Ifat Kaplan-Ashiri ◽  
Eric J. Titus ◽  
Katherine A. Willets
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Far Field

Submicron Simultaneous IR and Raman Spectroscopy (IR+Raman): Breakthrough Developments in Optical Photothermal IR (O-PTIR) Combined for Enhanced Failure Analysis

2019 ◽  
Author(s):  
Jay Anderson ◽  
Mustafa Kansiz ◽  
Michael Lo ◽  
Curtis Marcott
Keyword(s):  
Raman Spectroscopy ◽  
Failure Analysis ◽  
Data Quality ◽  
Raman Spectra ◽  
Spatial Resolution ◽  
Far Field ◽  
Field Mode ◽  
Microscopic Scale ◽  
Analytical Tools ◽  
Ir And Raman

Abstract Failure analysis of organics at the microscopic scale is an increasingly important requirement, with traditional analytical tools such as FTIR and Raman microscopy, having significant limitations in either spatial resolution or data quality. We introduce here a new method of obtaining Infrared microspectroscopic information, at the submicron level in reflection (far-field) mode, called Optical-Photothermal Infrared (O-PTIR) spectroscopy, that can also generate simultaneous Raman spectra, from the same spot, at the same time and with the same spatial resolution. This novel combination of these two correlative techniques can be considered to be complimentary and confirmatory, in which the IR confirms the Raman result and vice-versa, to yield more accurate and therefore more confident organic unknowns analysis.

scholarly journals Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Kodanda Rama Rao Chebattina ◽  
V. Srinivas ◽  
N. Mohan Rao
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Ball Milling ◽  
Multiwalled Carbon Nanotubes ◽  
Tribological Properties ◽  
Extreme Pressure ◽  
Multiwalled Carbon ◽  
Pristine Mwcnts ◽  
Gear Oil ◽  
The Stability

The aim of the paper is to investigate the effect of size of multiwalled carbon nanotubes (MWCNTs) as additives for dispersion in gear oil to improve the tribological properties. Since long pristine MWCNTs tend to form clusters compromising dispersion stability, they are mildly processed in a ball mill to shorten the length and stabilized with a surfactant before dispersing in lubricant. Investigations are made to assess the effect of ball milling on the size and structure of MWCNTs using electron microscopy and Raman spectroscopy. The long and shortened MWCNTs are dispersed in EP 140 gear oil in 0.5% weight. The stability of the dispersed multiwalled carbon nanotubes is evaluated using light scattering techniques. The antiwear, antifriction, and extreme pressure properties of test oils are evaluated on a four-ball wear tester. It is found that ball milling of MWCNTs has a strong effect on the stability and tribological properties of the lubricant. From Raman spectroscopy, it is found that ball milling time of up to 10 hours did not produce any defects on the surface of MWCNTs. The stability of the lubricant and the antiwear, antifriction, and extreme pressure properties have improved significantly with dispersion shortened MWCNTs. Ball milling for longer periods produces defects on the surface of MWCNTs reducing their advantage as oil additives.

Near-field and far-field effects in thermal radiation from metallic carbon nanotubes

2007 ◽  
Author(s):  
Andrei M. Nemilentsau ◽  
Gregory Ya. Slepyan ◽  
Sergey A. Maksimenko
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Radiation ◽  
Near Field ◽  
Far Field ◽  
Field Effects

Improved hydrothermal synthesis of MoS2 sheathed carbon nanotubes

2012 ◽  
Vol 66 (12) ◽  
Author(s):  
Jaciel Robles-Nuñez ◽  
Fernando Chiñas-Castillo ◽  
Manuel Sanchez-Rubio ◽  
Javier Lara-Romero ◽  
Rafael Huirache-Acuña ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Hydrothermal Synthesis ◽  
Reaction Temperature ◽  
High Yield ◽  
Hydrothermal Route ◽  
Simple Process ◽  
Toxic Materials ◽  
Resultant Material ◽  
Full Body

AbstractMoS2 sheathed carbon nanotubes have been successfully synthesized using a hydrothermal route under controlled conditions. The resultant material was studied by XRD, EDS, HRTEM, and Raman spectroscopy. Advantages of the preparation presented here compared to other methods are: a) lower reaction temperature, b) high yield of sheathed nanotubes including ends and full body, c) simple process with non-toxic materials, and d) no damage inflicted to nanotubes.

Surface-enhanced Raman spectroscopy characterisation of functionalised multi-walled carbon nanotubes

2015 ◽  
Vol 17 (33) ◽  
pp. 21373-21380 ◽  
Author(s):  
Sabina Botti ◽  
Susanna Laurenzi ◽  
Luca Mezi ◽  
Alessandro Rufoloni ◽  
M. Gabriella Santonicola
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Spectral Features ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

By applying SERS, we recorded spectral features from functional molecules bound to the nanotube surface, which are otherwise very difficult to see.

In Situ Atomic Force Microscopy Tip-Induced Deformations and Raman Spectroscopy Characterization of Single-Wall Carbon Nanotubes

Nano Letters ◽  
2012 ◽  
Vol 12 (8) ◽  
pp. 4110-4116 ◽  
Author(s):  
P. T. Araujo ◽  
N. M. Barbosa Neto ◽  
H. Chacham ◽  
S. S. Carara ◽  
J. S. Soares ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Atomic Force Microscopy ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Force Microscopy ◽  
Atomic Force

Ion implantation effect on Resonance Raman spectroscopy of double-wall carbon nanotubes

2010 ◽  
Author(s):  
E. C. Moreira ◽  
G. D. Saraiva ◽  
A. G. Souza Filho ◽  
G. Braunstein ◽  
H. Muramatsu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Ion Implantation ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Double Wall

The Generation of a Carbon Nanotube- Cyclodextrin Complex

2001 ◽  
Vol 703 ◽  
Author(s):  
G.F. Farrell ◽  
G. Chambers ◽  
A.B Dalton ◽  
E. Cummins ◽  
M. McNamara ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Carbon Nanotube ◽  
Intermolecular Interaction ◽  
Intermolecular Interactions ◽  
Small Diameter ◽  
Cyclodextrin Complex ◽  
Yellow Solution ◽  
Single Wall Nanotubes

ABSTRACTIn this study the intermolecular interactions of small diameter (∼0.7nm) carbon nanotubes and γ-cyclodextrin were examined. Four samples of γ cyclodextrin and HiPco carbon nanotubes were prepared. The first, by grinding the tubes and the cyclodextrin (1:30 ratio) together in a dry mixture, the second was prepared in a similar fashion but was ground in the presence of water (1ml). Finally an aqueous solution of γ-cyclodextrin (0.3M) and HiPco carbon nanotubes (5mg) was prepared by refluxing for ∼100 hours, forming a pale yellow solution from which a number of crystals were produced, both the solution and the recrystallised material were analysed. The samples were analysed using UV-Vis-NIR and Raman spectroscopy. The results presented are the first spectroscopic evidence of an intermolecular interaction between γ-cyclodextrin and single wall nanotubes.

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