检索结果-南通市图书馆

Bilayer self-assembly on a hydrophilic, deterministically nanopatterned surface

Nano Research 2013年第11期6卷 784-794页

作者： Gregory S. Smith Seung-Yong Jung James F. Browning Jong K. Keum Nickolay V. Lavrik Mussie G. Alemseghed C. Patrick Collier Biology and Soft Matter Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USA Chemical and Engineering Materials Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA Department of Chemical and Materials Engineering University of Cincinnati Cincinnati OH 45221-0012 USA

We present measurements of the in situ, microscopic architecture of a self- assembled bilayer at the interface between a regularly nanopatterned surface and an aqueous sub-phase using neutron reflectometry. The substrate is patterned with a rectangular array of nanoscale holes. Because of the high quality of the pattern, using neutron reflectometry, we are able to map the surface-normal density distribution of the patterned silicon, the penetration of water into the pattern, and the distribution of a deposited film inside and outside of the etched holes. In this stud; 1,2-dilauroyl-sn-glycero-3-phosphocholine （DLPC） single bilayers were deposited on the hydrophilic patterned surface. For bilayers deposited either by vesicle fusion （VF） or by the Langmuir-Schaefer （L-S） technique, the most consistent model found to fit the data shows that the lipids form bilayer coatings on top of the substrate as well as the bottoms of the holes in an essentially conformal fashion. However, while there is a single bilayer on the unetched silicon surface, the lipids coating the bottoms of the holes form a complex bimodal structure consistent with a rough surface produced by the etching process. This study provides insight into film transfer both outside and inside regular nanopatterned features.

关键词： thin film nanopattern neutron reflectivity lipid self-assembly

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phase segregation mechanisms of small molecule-polymer blends unraveled by varying polymer chain architecture

引用

SmartMat 2021年第3期2卷 367-377页

作者： Jihua Chen Sanjib Das Ming Shao Guoliang Li Huada Lian Jian Qin James F.Browning Jong K.Keum David Uhrig Gong Gu Kai Xiao Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTennesseeUSA Department of Electrical Engineering and Computer Science University of TennesseeKnoxvilleTennesseeUSA Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanChina Department of Materials Science and Engineering University of TennesseeKnoxvilleTennesseeUSA Department of Chemical Engineering Stanford UniversityStanfordCaliforniaUSA neutron Scattering Division Oak Ridge National LaboratoryOak RidgeTennesseeUSA

As phase separation between the small-molecule semiconductor and the polymer binder is the key enabler of blend-based organic field-effect transistors(OFETs)fabricated by low-cost solution processing,it is crucial to understand the underlying phase separation mechanisms that determine the phase morphology,which significantly impacts device *** the parameter space investigated in previous work,here we investigate the formation of blends by varying the branch architecture of the polymer binder and by shortening the solvent dry time using ultrasonic spray *** phase morphologies of the resulting blend films have been thoroughly characterized with a variety of techniques in three dimensions over multiple length scales,including AFM,energy-filtered transmission electron microscope,and neutron reflectivity,and have been correlated with electrical transport *** the results,we have inferred that the phase morphology is kinetically determined,limited by the inherent slow movement of polymer *** kinetic picture,supported by molecular dynamics modeling,not only consistently explains our observations but also resolves inconsistencies in previous *** achieved mechanistic understanding will guide further optimization of blend-based organic electronics,such as OFETs and organic photovoltaics.

关键词： neutron reflectivity organic field-effect transistors phase separation polymer binders

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：