Quantitative label-free characterization of avidin-biotin assemblies on silanized glass.

Quantitative label-free characterization of avidin-biotin assemblies on silanized glass.
复制标题

DOI:
10.1021/ac2016085
复制
发表时间:
2011-09-15
影响因子:
7.4
通讯作者:
Schweikert, Emile A.
Schweikert, Emile A.
中科院分区:
化学1区
文献类型:
--
作者:
Chen, Li-Jung;Seo, Jeong Hyun;Eller, Michael J.;Verkhoturov, Stanislav V.;Shah, Sunny S.;Revzin, Alexander;Schweikert, Emile A.

文献摘要

参考文献

被引文献

相似文献

在这项研究中,ToF-SIMS操作中的事件-事件轰击/检测模式被用来表征亲和素-生物素组件硅烷改性的玻璃基板上。西姆斯被用来分析几种变体的生物界面,包括抗生物素蛋白物理吸附在单官能丙烯酰硅烷表面和共价连接的单官能(胺封端)和双官能(胺和丙烯酰封端)硅烷。这些研究的目的是确定化学或物理吸附在硅烷化玻璃基底上的抗生物素蛋白和生物素层的密度。本研究中使用的C60射弹的单独撞击产生了一个半球形的弹坑(直径约10 nm),并从同一纳米体积中发射出大量的二次离子。因此,单次冲击能够展开跨越组装膜的厚度的不同的二次离子。该方法用于监测玻璃、硅烷和蛋白质离子的存在,并估计抗生物素蛋白层的厚度和密度。此外,我们采用双符合质谱法来确定从生物界面的特定层共同发射的离子。这种方法被用来确定密度的生物素和抗生物素蛋白固定,同时消除来自表面上的其他成分的同量异位素离子的干扰。总的来说,新的ToF-SIMS定量方法在这里是有用的,用于检查复杂的生物界面,并确定横向和深度组成的电影。
In this study, a ToF-SIMS operating in the event-by-event bombardment/detection mode was used to characterize avidin-biotin assemblies on silane-modified glass substrates. SIMS was used to analyze several variants of the biointerface, including avidin physically adsorbed on a monofunctional acryl silane surface and covalently attached on a mono-functional (amine terminated) and a bi-functional (amine and acryl terminated) silanes. The goal of these studies was to determine density of avidin and biotin layers chemical or physically adsorbed on silanized glass substrate. An individual impact of a C60 projectile used in this study creates a hemispherical crater (~10 nm in diameter) and emits large numbers of secondary ions from the same nanovolume. Thus, a single impact enables to unfold distinct secondary ions that span the thickness of the assembled film. This method was used to monitor presence of glass, silane and protein ions and to estimate the thickness and density of the avidin layer. In addition, we employed double coincidence mass spectrometry approach to identify ions co-emitted from a specific stratum of the biointerface. This approach was used to determine density of biotin and avidin immobilization while eliminating interferences from isobaric ions that originated from other constituents on the surface. Overall, novel ToF-SIMS quantitative approaches employed here were useful for examining complex biointerface and determining both lateral and in depth composition of the film.
DOI: 10.1021/la803635r
发表时间: 2009-04-09
期刊: Langmuir : the ACS journal of surfaces and colloids
影响因子: --
作者:
Lee JY;Shah SS;Yan J;Howland MC;Parikh AN;Pan T;Revzin A
通讯作者: Revzin A
DOI: 10.1021/jz1014345
发表时间: 2010-12-16
影响因子: 5.7
作者:
Fernandez-Lima, F. A.;Eller, M. J.;Schweikert, E. A.
通讯作者: Schweikert, E. A.
DOI: 10.1021/nl904208y
发表时间: 2010-02-01
期刊: NANO LETTERS
影响因子: 10.8
作者:
Gunnarsson, Anders;Sjovall, Peter;Hook, Fredrik
通讯作者: Hook, Fredrik
DOI: 10.1016/0168-583x(93)96034-a
发表时间: 1993-07-01
影响因子: 1.3
作者:
RAY, KB;PARK, MA;SCHWEIKERT, EA
通讯作者: SCHWEIKERT, EA
DOI: 10.1021/jp9073703
发表时间: 2010-04-01
影响因子: 3.7
作者:
Verkhoturov, S. V.;Eller, M. J.;Schweikert, E. A.
通讯作者: Schweikert, E. A.