Abstract
We investigated the interfacial electronic structures of Al/adenine/indium-tin-oxide (ITO) and Al/thymine/ITO using in situ ultraviolet and x-ray photoemission spectroscopy and density functional theory calculations. Adenine shows both an interface dipole and level bending, whereas thymine shows only an interface dipole in contact with ITO. In addition, thymine possesses a larger ionization energy than adenine. These are understood with delocalized π states confirmed with theoretical calculations. For the interface between nucleobases and Al, both nucleobases show a prominent reduction of the electron injection barrier from Al to each base in accordance with a downward level shift.
| Original language | English |
|---|---|
| Article number | 233305 |
| Journal | Applied Physics Letters |
| Volume | 101 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 2012 Dec 3 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
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Energy level alignment at the interfaces between typical electrodes and nucleobases : Al/adenine/indium-tin-oxide and Al/thymine/indium-tin-oxide. / Lee, Younjoo; Lee, Hyunbok; Park, Soohyung; Yi, Yeonjin.
In: Applied Physics Letters, Vol. 101, No. 23, 233305, 03.12.2012.Research output: Contribution to journal › Article
TY - JOUR
T1 - Energy level alignment at the interfaces between typical electrodes and nucleobases
T2 - Al/adenine/indium-tin-oxide and Al/thymine/indium-tin-oxide
AU - Lee, Younjoo
AU - Lee, Hyunbok
AU - Park, Soohyung
AU - Yi, Yeonjin
PY - 2012/12/3
Y1 - 2012/12/3
N2 - We investigated the interfacial electronic structures of Al/adenine/indium-tin-oxide (ITO) and Al/thymine/ITO using in situ ultraviolet and x-ray photoemission spectroscopy and density functional theory calculations. Adenine shows both an interface dipole and level bending, whereas thymine shows only an interface dipole in contact with ITO. In addition, thymine possesses a larger ionization energy than adenine. These are understood with delocalized π states confirmed with theoretical calculations. For the interface between nucleobases and Al, both nucleobases show a prominent reduction of the electron injection barrier from Al to each base in accordance with a downward level shift.
AB - We investigated the interfacial electronic structures of Al/adenine/indium-tin-oxide (ITO) and Al/thymine/ITO using in situ ultraviolet and x-ray photoemission spectroscopy and density functional theory calculations. Adenine shows both an interface dipole and level bending, whereas thymine shows only an interface dipole in contact with ITO. In addition, thymine possesses a larger ionization energy than adenine. These are understood with delocalized π states confirmed with theoretical calculations. For the interface between nucleobases and Al, both nucleobases show a prominent reduction of the electron injection barrier from Al to each base in accordance with a downward level shift.
UR - http://www.scopus.com/inward/record.url?scp=84870916900&partnerID=8YFLogxK
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U2 - 10.1063/1.4769438
DO - 10.1063/1.4769438
M3 - Article
AN - SCOPUS:84870916900
VL - 101
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 23
M1 - 233305
ER -