Abstract
We use sub-picosecond transient absorption spectroscopy to demonstrate selective excitation in a polydisperse aqueous sample of single-wall carbon nanotubes. Tuning the excitation energy above and below the bandgap of a specific semiconducting nanotube produces significant variation in the photoinduced absorption change at the bandgap. Comparing the recovery of the ultrafast photoinduced absorption for metallic and semiconducting nanotubes for excitation above and below the lowest interband transition, we find that metallic SWNTs show a faster recovery. We attribute the faster recovery to the absence of long-lived exciton states in metallic SWNTs.
| Original language | English |
|---|---|
| Title of host publication | Proceedings - Electrochemical Society |
| Pages | 415-420 |
| Number of pages | 6 |
| Volume | PV 2004-22 |
| Publication status | Published - 2006 |
| Event | 205th Electrochemical Society Meeting - San Antonio, TX, United States Duration: May 9 2004 → May 14 2004 |
Other
| Other | 205th Electrochemical Society Meeting |
|---|---|
| Country | United States |
| City | San Antonio, TX |
| Period | 5/9/04 → 5/14/04 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Excitation energy dependence of the ultrafast transient absorption response of single-wall carbon nanotubes. / Ellingson, Randy J.; Engtrakul, Chaiwat; Jones, Marcus; Rumbles, Gary; Heben, Michael J.; Nozik, Arthur J.
Proceedings - Electrochemical Society. Vol. PV 2004-22 2006. p. 415-420.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Excitation energy dependence of the ultrafast transient absorption response of single-wall carbon nanotubes
AU - Ellingson, Randy J.
AU - Engtrakul, Chaiwat
AU - Jones, Marcus
AU - Rumbles, Gary
AU - Heben, Michael J.
AU - Nozik, Arthur J.
PY - 2006
Y1 - 2006
N2 - We use sub-picosecond transient absorption spectroscopy to demonstrate selective excitation in a polydisperse aqueous sample of single-wall carbon nanotubes. Tuning the excitation energy above and below the bandgap of a specific semiconducting nanotube produces significant variation in the photoinduced absorption change at the bandgap. Comparing the recovery of the ultrafast photoinduced absorption for metallic and semiconducting nanotubes for excitation above and below the lowest interband transition, we find that metallic SWNTs show a faster recovery. We attribute the faster recovery to the absence of long-lived exciton states in metallic SWNTs.
AB - We use sub-picosecond transient absorption spectroscopy to demonstrate selective excitation in a polydisperse aqueous sample of single-wall carbon nanotubes. Tuning the excitation energy above and below the bandgap of a specific semiconducting nanotube produces significant variation in the photoinduced absorption change at the bandgap. Comparing the recovery of the ultrafast photoinduced absorption for metallic and semiconducting nanotubes for excitation above and below the lowest interband transition, we find that metallic SWNTs show a faster recovery. We attribute the faster recovery to the absence of long-lived exciton states in metallic SWNTs.
UR - http://www.scopus.com/inward/record.url?scp=33749549242&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33749549242&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:33749549242
SN - 1566774357
SN - 9781566774352
VL - PV 2004-22
SP - 415
EP - 420
BT - Proceedings - Electrochemical Society
ER -