TY - JOUR
T1 - On the Langmuir-Blodgett transfer of copper tetra-tert-butyl phthalocyanine monolayers in the presence of arachidic acid
AU - Sheu, Ching Wen
AU - Lin, Kuen Mo
AU - Ku, I. Hsun
AU - Chang, Chien Hsiang
AU - Lee, Yuh Lang
AU - Yang, Yu Min
AU - Maa, Jer Ru
N1 - Funding Information:
This work was supported by the National Science Council of the Republic of China through Grant NSC 89-2214-E-006-030.
PY - 2002/7/30
Y1 - 2002/7/30
N2 - This study investigated the influence of arachidic acid as a transfer promoter on the deposition of multilayer copper tetra-tert-butyl phthalocyanine (CuTTBPc) Langmuir-Blodgett (L-B) films on both hydrophilic glass and hydrophobic silanized-glass substrates. With the addition of arachidic acid in a CuTTBPc monolayer at the air/water interface, two transitions corresponding to monolayer collapse were observed in the surface pressure-area isotherm. However, the added arachidic acid had no effect on area relaxation of a CuTTBPc monolayer at 20 mN m-1. The up-stroke L-B transfer of a CuTTBPc monolayer at 20 mN m-1 onto a glass substrate was perfect with a transfer ratio of 1.0, but most of the deposited film respread onto the interface during the following down-stroke deposition. It appears that the addition of arachidic acid with a molar fraction of 0.5 caused insignificant influence on the continuous L-B deposition of CuTTBPc films on glass substrates. On a silanized-glass substrate, imperfect Y-type multilayer CuTTBPc L-B films could be fabricated with transfer ratios around 0.5. The presence of arachidic acid in a CuTTBPc monolayer may considerably improve the down-stroke first layer deposition with a transfer ratio close to one. Moreover, the following up-stroke deposition quality of the L-B films was strongly affected by the molar fraction of arachidic acid.
AB - This study investigated the influence of arachidic acid as a transfer promoter on the deposition of multilayer copper tetra-tert-butyl phthalocyanine (CuTTBPc) Langmuir-Blodgett (L-B) films on both hydrophilic glass and hydrophobic silanized-glass substrates. With the addition of arachidic acid in a CuTTBPc monolayer at the air/water interface, two transitions corresponding to monolayer collapse were observed in the surface pressure-area isotherm. However, the added arachidic acid had no effect on area relaxation of a CuTTBPc monolayer at 20 mN m-1. The up-stroke L-B transfer of a CuTTBPc monolayer at 20 mN m-1 onto a glass substrate was perfect with a transfer ratio of 1.0, but most of the deposited film respread onto the interface during the following down-stroke deposition. It appears that the addition of arachidic acid with a molar fraction of 0.5 caused insignificant influence on the continuous L-B deposition of CuTTBPc films on glass substrates. On a silanized-glass substrate, imperfect Y-type multilayer CuTTBPc L-B films could be fabricated with transfer ratios around 0.5. The presence of arachidic acid in a CuTTBPc monolayer may considerably improve the down-stroke first layer deposition with a transfer ratio close to one. Moreover, the following up-stroke deposition quality of the L-B films was strongly affected by the molar fraction of arachidic acid.
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U2 - 10.1016/S0927-7757(02)00033-X
DO - 10.1016/S0927-7757(02)00033-X
M3 - Article
AN - SCOPUS:0037199397
SN - 0927-7757
VL - 207
SP - 81
EP - 88
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -