1－苄基－9－氢富勒烯－60LB多层膜的制备及其光学非线性性质

利用π－Ａ等温线、小角Ｘ射线衍射（ＳＡＸＤ）和光学测量方法研究了一种取代富勒烯（Ｃ６０－Ｂｅ）ＬＢ膜的结构特性。纯Ｃ６０－Ｂｅ分子以体相（ｂｕｌｋｐｈａｓｅ）的形式存在于气－液界面上。氮冠（醚）（ＮＣ）分子作为隔层材料，与Ｃ６０－Ｂｅ分子相混合可以制备性能优良的ＬＢ膜。π－Ａ、吸收和小角Ｘ光衍射测量表明：这种混合膜结构的改善是由于Ｃ６０－Ｂｅ分子镶嵌在ＮＣ分子的双脂链之间造成的。通过测量三次谐波产生（ＴＨＧ）可以推出Ｃ６０－Ｂｅ的三阶非线性系数χ（３）＝２．１×１０－１１ｅｓｕ。     

取代基对双酞菁铥LB膜及光谱特性的影响

采用紫外-可见吸收光谱的方法研究了三种稀土夹心双酞菁铥化合物在溶液和LB膜中的聚集性和光谱特性。实验结果表明三种稀土双酞菁化合物在氯仿溶液中形成了H-聚集体,但当浓度比较低时,溶液中表现出单体的吸收。取代基OC₈H₁₇的加入使氯仿溶液中双酞菁铥化合物的聚集性减弱,而且使得吸收峰发生红移,对吸收峰的强度也有较大的影响,造成了Soret吸收带的分裂。另外,取代基OC₈H₁₇对LB膜中双酞菁分子的存在状态有较大的影响,在LB膜中,TmPc₂和TmPcPc*分子以H-聚集体的形式存在,而TmPc*₂分子以T-聚集体的形式存在。形成LB膜后,由于双酞菁分子之间排列紧密,相互作用加强,使得薄膜中分子聚集体的吸收峰相对于溶液中聚集体的吸收峰发生了一定的红移,薄膜中分子排列方向的不同对吸收光谱也有一定的影响。     

亚相中加卤化物的半花菁衍生物LB膜的二次谐波研究

报道了亚相中ＫＩ对纯的及混合的半花菁衍生物Ｅ－Ｎ－二十二烷基－４－［２－（４－二乙氨基）苯乙烯基］氢溴酸吡啶嗡单分子层膜的π－Ａ曲线、紫外－可见吸收光谱及二次谐波产生的影响，并探讨了其物理机制，当ＫＩ浓度加大时，分子有效二阶非线性极化率β随之增大并始终伴随着吸收峰的红移，分子电荷分布的改变及激发态能量的减小导致二次谐波近共振增强效应是分子有效β值增大的主要原因之一。     

由组分可控的LB膜前驱物法制备Y2O3稳定立方相ZrO2的超薄陶瓷膜

由有机LB膜技术发展了一种制备组分、厚度可控的无机超薄陶瓷膜的方法 .以Zr、Y的 β 二酮络合物的作为“表面离子”代替传统的亚相离子 ,沉积它们与花生酸的混合LB膜 .并将它作为前驱物 ,经臭氧处理和热处理 ,成功制得了Y2 O3 稳定的立方相ZrO2 超薄膜 (YSZ) .用X射线衍射 (XRD)、X射线光电子能谱 (XPS)等手段研究了YSZ薄膜的相结构和其组成 .结果表明 ,超薄陶瓷膜中Zr与Y的含量比率控制得很好 ,且形成Y2 O3 稳定的立方相ZrO2 .说明这种方法可以成功地用来制备组分和膜厚均可控的纳米陶瓷膜 .     

10,12-双炔甘三酸镉盐LB膜的FT-IR光谱

近年来,由于LB膜在功能器件中(如光电子器件,微型电池、低维半导体、热释电探测器等)显示出了令人兴奋的应用前景,因此有越来越多的人致力于LB膜的研究工作.其中对LB膜的成膜质量的评价,特别是LB膜的分子取向问题,是一个非常引人关注的问题.此外,对于碳原子数大于20,熔点小于45℃的系列双炔酸(R—C≡C—C≡C—R′)可以利用LB技术制备多层膜.这类LB膜在紫外光或电子束的作用下可以迅速发生聚合.利     

具有长侧碳链的苯醌类化合物在LB膜上的电化学行为

用LB膜技术将含有长侧碳链的泛醌或质体醌类似物转移到导电玻璃上，用循环伏安法研究了它们的电化学行为．发现醌环上的取代基对其电化学行为有明显影响，提出了泛醌类似物和质体醌类似物在LB膜上的具体电化学过程．     

A hydrogen peroxide biosensor based on Langmuir-Blodgett technique: Direct electron transfer of hemoglobin in octadecylamine layer

The present paper describes the modification of hemoglobin (Hb)-octadecylamine (ODA) Langmuir-Blodgett (LB) film on a gold electrode surface to develop a novel electrochemical biosensor for the detection of hydrogen peroxide. Atomic force microscopy (AFM) image of Hb-ODA LB film indicated Hb molecules existed in ODA layer in a well-ordered and compact form. The immobilized Hb displayed a couple of stable and well-defined redox peaks with an electron transfer rate constant of 4.58 ± 0.95 s⁻¹ and a formal potential of −185 mV (versus Ag/AgCl) in phosphate buffer (1.0 mM, pH 5.0) contain 0.1 M KCl at a scan rate of 200 mV s⁻¹, characteristic of Hb heme Fe(III)/Fe(II) redox couple. The formal potential of Hb heme Fe(III)/Fe(II) redox couple in ODA film shifted linearly between pH 5 and 8 with a slope of −23.8 mV pH⁻¹, suggesting that proton took part in electrochemical reaction. The ODA could accelerate the electron transfer between Hb and the electrode. This modified electrode showed an electrochemical activity to the reduction of hydrogen peroxide (H₂O₂) without the aid of any electron mediator.     

Mechanical and thermal properties of irradiated films based on Tilapia (Oreochromis niloticus) proteins

Proteins are considered potential material in natural films as alternative to traditional packaging. When gamma radiation is applied to protein film forming solution it resulted in an improvement in mechanical properties of whey protein films. The objective of this work was the characterization of mechanical and thermal properties of irradiated films based on muscle proteins from Nile Tilapia (Oreochromis niloticus). The films were prepared according to a casting technique with two levels of plasticizer: 25% and 45% glycerol and irradiated in electron accelerator type Radiation Dynamics, 0.550 MeV at dose range from 0 to 200 kGy. Thermal properties and mechanical properties were determined using a differential scanning calorimeter and a texture analyzer, respectively. Radiation from electron beam caused a slightly increase on its tensile strength characteristic at 100 kGy, while elongation value at this dose had no reduction.     

Surface characterization of functional poly(diacetylene) and poly(butadiene) mono- and multilayers

The surface properties of Langmuir-Blodgett mono- and multilayers of a variety of amphiphilic poly(diacetylene)s and poly(butadiene)s were investigated by contact angle, streaming potential, ellipsometry, and X-ray photoelectron spectroscopic (XPS) measurements. Captive air and octane angles varied between approximately 60° and 105° for hydrophobicx-layers and 31° to 46° for hydrophilic surfaces depending on the particular head group, whereas advancing angles determined via the vertical plate method are considerably higher. Negative streaming potentials were obtained for all surfaces. Positively charged monolayers yielded less negative- potential values (–28 mV) than negatively charged (–52 mV) or hydrophobic (–50 mV) layers. Ellipsometry measurements yielded an average layer thickness of 27±6 Å for 3 to 11 layers. X-ray photoelectron spectroscopy results qualitatively confirmed the expected composition. All of the samples, which were handled and stored in air after deposition and polymerization, were surface oxidized.Dedicated to Prof. Dr. F. H. Müller.     

FTIR spectroscopy of monomolecular layers and multilayers of organic molecules on solid substrates

A method for measuring grazing incidence reflection spectra of monomolecular organic layers is presented which involves the use of a stepmotor-driven translation stage to alternately measure the covered and uncovered part of a metal substrate and averaging of the spectra from several such cycles. The method is applied to Langmuir-Blodgett films of poly(octadecylmethacrylate).