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:
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1083049
- Patent Number(s):
- 8395123
- Application Number:
- 12/888,260
- Assignee:
- Los Alamos National Security, LLC (Los Alamos, NM)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
- 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 = {Tue Mar 12 00:00:00 EDT 2013},
month = {Tue Mar 12 00:00:00 EDT 2013}
}
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