Phospholipid langmuir film as template for in situ silica nanoparticle formation at the air/water interface.

Phospholipid langmuir film as template for in situ silica nanoparticle formation at the air/water interface.
复制标题

磷脂朗缪尔膜作为空气/水界面处原位二氧化硅纳米颗粒形成的模板

DOI:
10.1021/la903525u
复制
发表时间:
2009
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
通讯作者:
Kressler
Kressler
中科院分区:
--
文献类型:
--
作者:
Pfefferkorn;Binder;Kressler

文献摘要

参考文献

被引文献

相似文献

本研究首次描述了四乙基硅酸盐(TEOS)在空气/水界面缩聚后形成小粒径二氧化硅纳米颗粒的情况。以不同的摩尔比(TEOS/DPPC 15:1、50:1、500:1和5000:1)制备TEOS与1,2-二棕榈酰- n-甘油-3-磷脂胆碱(DPPC)的混合物,并将其溶解在氯仿中。将TEOS/DPPC 15:1和50:1分布在Langmuir槽的水面上,允许氯仿蒸发后,表面压力初始增加(~ 26−29 mN/m)。在21 h的反应时间内,表面压力只略微下降了~ 2 mN/m。通过浸涂将二氧化硅/DPPC混合物薄膜从空气/水界面转移到硅片上。利用原子力显微镜(AFM)观察了二氧化硅纳米颗粒及其团聚体与DPPC的形貌。TEOS/DPPC 500:1前驱体溶液反应21 h后,可以观察到有序排列的二氧化硅纳米颗粒,并转移到亲水硅衬底上。TEOS/DPPC的摩尔比为5000:1的混合物也放在水面上。DPPC在膜转移后形成均匀的膜,AFM观察到。富二氧化硅区可以通过介孔形貌观察到。
This study describes for the first time thein situformation of small-sized silica nanoparticles after the polycondensation of tetraethylorthosilicate (TEOS) at the air/water interface. Mixtures of TEOS and 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) are prepared with different molar ratios (TEOS/DPPC 15:1, 50:1, 500:1, and 5000:1) and dissolved in chloroform. Spreading TEOS/DPPC 15:1 and 50:1 on the water surface of a Langmuir trough leads to an initial increase of the surface pressure (∼26−29 mN/m) after allowing chloroform to evaporate. Within the reaction time of 21 h, only a slight decrease of the surface pressure by ∼2 mN/m occurs. Films of silica/DPPC mixtures are transferred from the air/water interface to silicon wafers by dip-coating. The morphologies of the silica nanoparticles and agglomerates together with DPPC are observed using tapping mode atomic force microscopy (AFM). An ordered array of silica nanoparticles can be observed after 21 h reaction of the precursor solution of TEOS/DPPC 500:1 and transfer onto hydrophilic silicon substrate. A mixture with a molar ratio of TEOS/DPPC of 5000:1 is also placed onto the water surface. DPPC forms a uniform film observed by AFM after film transfer. Silica rich domains can be observed with mesoporous morphology.
DOI: 10.1021/la970898e
发表时间: 1997-12-24
期刊: LANGMUIR
影响因子: 3.9
作者:
McConlogue, CW;Vanderlick, TK
通讯作者: Vanderlick, TK
硅酸盐的溶胶-凝胶加工
DOI: --
发表时间: 1985
期刊:
影响因子: --
作者:
L. Klein
通讯作者: L. Klein
空气/水界面处聚合物-有机硅烷相互作用的研究
DOI: --
发表时间: 2000
期刊:
影响因子: --
作者:
M. And;J. Rosenholm
通讯作者: J. Rosenholm
DOI: 10.1038/nmat1107
发表时间: 2004-05-01
期刊: NATURE MATERIALS
影响因子: 41.2
作者:
Yamaguchi, A;Uejo, F;Teramae, N
通讯作者: Teramae, N