Vapor-phase adsorption kinetics of 1-decene
2006-01-13 09:15
浏览:1873次
分享:
资料摘要:
We have investigated in situ and in real time vapor-phase adsorption kinetics of 1-decene on hydrogenated Si(111), using attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIRS). The Si surface is hydroge-nated in a NH4F solution. The p-polarized IR absorbance of Si–H vibrational mode at 2083.7 cm1 and its absence in s-polarized IR absorption spectrum support that the Si(111) surface is terminated mostly with monohydrides prior to 1-decene exposure. The 1-decene adsorption and simultaneous dehydrogenation result in a decane self-assembled monolayer (SAM). We have employed contact angle goniometry and angle-resolved X-ray photoelectron spectroscopy (AR-XPS) to characterize the decane SAM prepared at substrate temperatures ranging from 30 to 180 C. Independent of the substrate temperature, the average sessile-drop water contact angle on decane SAM is 102 ± 2, indicative of its hydrophobicity.
下载本篇资料:
Vapor-phase adsorption kinetics of 1-decene
353KB
推荐资料
Thermofisher Labserv CO150 CO2培养箱,易于操作和维护,为您细胞培养提供了良好的生存环境,并且添加了有效的湿热灭菌功能,是您细胞安心培养的“兵工厂”。
熟悉ALPHA 1-2 LDplus冻干机的使用者都了解,其广泛应用于植物提取物、生物样品、药物制剂研究中的冻干实验。但除了这些典型的应用,仍有一些其他典型实验,也是可以用到ALPHA 1-2 LDplus的。那我们就来看看,还有哪些是我们未知或不熟悉的典型应用:
德国Christ公司是专业生产真空离心浓缩仪的厂家,有着60多年的历史。就其浓缩仪中样品温度的变化,我们进行了详细的数据记录(图1、图2所示),从图1我们发现,当真空值设为7mbar,腔体加热温度设为79℃时,离心腔在61~79℃逐渐升温,对应的转子温度是51.1~71.7℃逐渐升温,而样品温度在14.7~18.2度之间。
离心机是实验室最常用的仪器设备,在任何实验中,离心时的容量需求以及转速表现是使用者最关心的两个方面,那我们就来梳理下常规实验中所需的离心容量及转速情况: