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Title: Fluorescent single walled nanotube/silica composite materials

Abstract

Fluorescent composites of surfactant-wrapped single-walled carbon nanotubes (SWNTs) were prepared by exposing suspensions of surfactant-wrapped carbon nanotubes to tetramethylorthosilicate (TMOS) vapor. Sodium deoxycholate (DOC) and sodium dodecylsulphate (SDS) were the surfactants. No loss in emission intensity was observed when the suspension of DOC-wrapped SWNTs were exposed to the TMOS vapors, but about a 50% decrease in the emission signal was observed from the SDS-wrapped SWNTs nanotubes. The decrease in emission was minimal by buffering the SDS/SWNT suspension prior to forming the composite. Fluorescent xerogels were prepared by adding glycerol to the SWNT suspensions prior to TMOS vapor exposure, followed by drying the gels. Fluorescent aerogels were prepared by replacing water in the gels with methanol and then exposing them to supercritical fluid drying conditions. The aerogels can be used for gas sensing.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
LANL (Los Alamos National Laboratory (LANL), Los Alamos, NM (United States))
Sponsoring Org.:
USDOE
OSTI Identifier:
1083049
Patent Number(s):
8,395,123
Application Number:
12/888,260
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Dattelbaum, Andrew M., Gupta, Gautam, Duque, Juan G., Doorn, Stephen K., Hamilton, Christopher E., and DeFriend Obrey, Kimberly A. Fluorescent single walled nanotube/silica composite materials. United States: N. p., 2013. Web.
Dattelbaum, Andrew M., Gupta, Gautam, Duque, Juan G., Doorn, Stephen K., Hamilton, Christopher E., & DeFriend Obrey, Kimberly A. Fluorescent single walled nanotube/silica composite materials. United States.
Dattelbaum, Andrew M., Gupta, Gautam, Duque, Juan G., Doorn, Stephen K., Hamilton, Christopher E., and DeFriend Obrey, Kimberly A. Tue . "Fluorescent single walled nanotube/silica composite materials". United States. https://www.osti.gov/servlets/purl/1083049.
@article{osti_1083049,
title = {Fluorescent single walled nanotube/silica composite materials},
author = {Dattelbaum, Andrew M. and Gupta, Gautam and Duque, Juan G. and Doorn, Stephen K. and Hamilton, Christopher E. and DeFriend Obrey, Kimberly A.},
abstractNote = {Fluorescent composites of surfactant-wrapped single-walled carbon nanotubes (SWNTs) were prepared by exposing suspensions of surfactant-wrapped carbon nanotubes to tetramethylorthosilicate (TMOS) vapor. Sodium deoxycholate (DOC) and sodium dodecylsulphate (SDS) were the surfactants. No loss in emission intensity was observed when the suspension of DOC-wrapped SWNTs were exposed to the TMOS vapors, but about a 50% decrease in the emission signal was observed from the SDS-wrapped SWNTs nanotubes. The decrease in emission was minimal by buffering the SDS/SWNT suspension prior to forming the composite. Fluorescent xerogels were prepared by adding glycerol to the SWNT suspensions prior to TMOS vapor exposure, followed by drying the gels. Fluorescent aerogels were prepared by replacing water in the gels with methanol and then exposing them to supercritical fluid drying conditions. The aerogels can be used for gas sensing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {3}
}

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