摘要
Using a Langmuir-Blodgett film of dipalmitoylphosphatidylcholine(DPPC), a model of biomembranes, as a template, we succeed in obtaining oriented KH 2PO 4(KDP) crystals toward crystal face (100) under well-compressed DPPC monolayer. This is explicable in terms of the geometrical complementarity between KDP and the DPPC monolayer. It is found that the distances between the closest K-K (0.416 nm) fit the d(100) network spacing of DPPC monolayer(0.420 nm), which results in that the special activation energy for nucleation exists in the interface covered with DPPC monolayer. DPPC monolayer has a very strong selected catalysis on the crystallization of KDP crystal face (100), and drives KDP rapid and oriented nucleation on the monolayer/solution interface. The oriented KDP crystals show a good second harmonic generation(SHG) signal.
Using a Langmuir-Blodgett film of dipalmitoylphosphatidylcholine(DPPC), a model of biomembranes, as a template, we succeed in obtaining oriented KH 2PO 4(KDP) crystals toward crystal face (100) under well-compressed DPPC monolayer. This is explicable in terms of the geometrical complementarity between KDP and the DPPC monolayer. It is found that the distances between the closest K-K (0.416 nm) fit the d(100) network spacing of DPPC monolayer(0.420 nm), which results in that the special activation energy for nucleation exists in the interface covered with DPPC monolayer. DPPC monolayer has a very strong selected catalysis on the crystallization of KDP crystal face (100), and drives KDP rapid and oriented nucleation on the monolayer/solution interface. The oriented KDP crystals show a good second harmonic generation(SHG) signal.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期185-186,共2页
Chemical Journal of Chinese Universities
基金
教育部无机合成与制备化学研究开放实验室基金资助
关键词
晶体生长
取向生长
磷酸二氢钾
非线性光学材料
Dipalmitoylphosphatidylcholine
KDP
Oriented growth
Second harmonic generation
