Abstract
Long-term stability of intermediate liquid crystal pretilt angles on a poly(dimethylsiloxane) (PDMS) ultrathin film grafted onto a surface was realized simply and easily via low-energy ion beam (IB) treatment. The composition and surface energy of the thin film could be controlled by varying the low-energy IB treatment. This treatment results in the permanent chemical modification of the film surface, converting it from organic PDMS to a mixed layer of organic PDMS and inorganic silica. The partial transformation of a PDMS surface gives rise to the control of the pretilt angle via the formation of the inhomogeneous surface and the stabilization of the pretilt angle via the cross-linking reaction of broken chemical bonds through IB irradiation. As a result, a continuous variation of pretilt angles that maintained their initial value with long-term stability was obtained. Thus, the unique chemical transformation of the PDMS surface using IB treatment may allow for the production of durable intermediate liquid crystal pretilt angles.
| Original language | English |
|---|---|
| Pages (from-to) | 5072-5076 |
| Number of pages | 5 |
| Journal | Langmuir |
| Volume | 26 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2010 Apr 6 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry
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Delicate modification of poly(dimethylsiloxane) ultrathin film by low-energy ion beam treatment for durable intermediate liquid crystal pretilt angles. / Hwang, Byoung Har; Choi, Chu Ji; Jo, Min Kyoung; Kim, Jong Bok; Choe, Hae Min; Chae, Soo Sang; Kim, Youn Sang; Baik, Hong Koo.
In: Langmuir, Vol. 26, No. 7, 06.04.2010, p. 5072-5076.Research output: Contribution to journal › Article
TY - JOUR
T1 - Delicate modification of poly(dimethylsiloxane) ultrathin film by low-energy ion beam treatment for durable intermediate liquid crystal pretilt angles
AU - Hwang, Byoung Har
AU - Choi, Chu Ji
AU - Jo, Min Kyoung
AU - Kim, Jong Bok
AU - Choe, Hae Min
AU - Chae, Soo Sang
AU - Kim, Youn Sang
AU - Baik, Hong Koo
PY - 2010/4/6
Y1 - 2010/4/6
N2 - Long-term stability of intermediate liquid crystal pretilt angles on a poly(dimethylsiloxane) (PDMS) ultrathin film grafted onto a surface was realized simply and easily via low-energy ion beam (IB) treatment. The composition and surface energy of the thin film could be controlled by varying the low-energy IB treatment. This treatment results in the permanent chemical modification of the film surface, converting it from organic PDMS to a mixed layer of organic PDMS and inorganic silica. The partial transformation of a PDMS surface gives rise to the control of the pretilt angle via the formation of the inhomogeneous surface and the stabilization of the pretilt angle via the cross-linking reaction of broken chemical bonds through IB irradiation. As a result, a continuous variation of pretilt angles that maintained their initial value with long-term stability was obtained. Thus, the unique chemical transformation of the PDMS surface using IB treatment may allow for the production of durable intermediate liquid crystal pretilt angles.
AB - Long-term stability of intermediate liquid crystal pretilt angles on a poly(dimethylsiloxane) (PDMS) ultrathin film grafted onto a surface was realized simply and easily via low-energy ion beam (IB) treatment. The composition and surface energy of the thin film could be controlled by varying the low-energy IB treatment. This treatment results in the permanent chemical modification of the film surface, converting it from organic PDMS to a mixed layer of organic PDMS and inorganic silica. The partial transformation of a PDMS surface gives rise to the control of the pretilt angle via the formation of the inhomogeneous surface and the stabilization of the pretilt angle via the cross-linking reaction of broken chemical bonds through IB irradiation. As a result, a continuous variation of pretilt angles that maintained their initial value with long-term stability was obtained. Thus, the unique chemical transformation of the PDMS surface using IB treatment may allow for the production of durable intermediate liquid crystal pretilt angles.
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UR - http://www.scopus.com/inward/citedby.url?scp=77950556903&partnerID=8YFLogxK
U2 - 10.1021/la903535c
DO - 10.1021/la903535c
M3 - Article
C2 - 20350010
AN - SCOPUS:77950556903
VL - 26
SP - 5072
EP - 5076
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 7
ER -