Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes
Bandgap-selective p doping of single-walled carbon nanotubes (SWCNTs) in aqueous surfactant suspensions is reported. Nanotubes with narrower bandgaps are preferentially doped by hexacyanoferrate (III), as observed by optical absorption. The bandgap absorption characteristics, which are controlled by...
| প্রধান লেখক: | , |
|---|---|
| বিন্যাস: | Journal article |
| ভাষা: | English |
| প্রকাশিত: |
2004
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| _version_ | 1826298177715699712 |
|---|---|
| author | Li, L Nicholas, R |
| author_facet | Li, L Nicholas, R |
| author_sort | Li, L |
| collection | OXFORD |
| description | Bandgap-selective p doping of single-walled carbon nanotubes (SWCNTs) in aqueous surfactant suspensions is reported. Nanotubes with narrower bandgaps are preferentially doped by hexacyanoferrate (III), as observed by optical absorption. The bandgap absorption characteristics, which are controlled by the chemical potential, can be reversibly adjusted by controlling the oxidation potential of the dopants through the pH value. The origin of the selective modification of bandgap absorption is electron transfer between the carbon nanotubes and the hexacyanoferrate (III), which preferentially depopulates the valence band in narrower gap nanotubes. |
| first_indexed | 2024-03-07T04:42:53Z |
| format | Journal article |
| id | oxford-uuid:d242f1fe-291f-4de5-9705-ec2d2b88e6e4 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:42:53Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:d242f1fe-291f-4de5-9705-ec2d2b88e6e42022-03-27T08:02:36ZBandgap-selective chemical doping of semiconducting single-walled carbon nanotubesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d242f1fe-291f-4de5-9705-ec2d2b88e6e4EnglishSymplectic Elements at Oxford2004Li, LNicholas, RBandgap-selective p doping of single-walled carbon nanotubes (SWCNTs) in aqueous surfactant suspensions is reported. Nanotubes with narrower bandgaps are preferentially doped by hexacyanoferrate (III), as observed by optical absorption. The bandgap absorption characteristics, which are controlled by the chemical potential, can be reversibly adjusted by controlling the oxidation potential of the dopants through the pH value. The origin of the selective modification of bandgap absorption is electron transfer between the carbon nanotubes and the hexacyanoferrate (III), which preferentially depopulates the valence band in narrower gap nanotubes. |
| spellingShingle | Li, L Nicholas, R Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title | Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title_full | Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title_fullStr | Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title_full_unstemmed | Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title_short | Bandgap-selective chemical doping of semiconducting single-walled carbon nanotubes |
| title_sort | bandgap selective chemical doping of semiconducting single walled carbon nanotubes |
| work_keys_str_mv | AT lil bandgapselectivechemicaldopingofsemiconductingsinglewalledcarbonnanotubes AT nicholasr bandgapselectivechemicaldopingofsemiconductingsinglewalledcarbonnanotubes |