Title: Effect of Grafting Density on the Two-dimensional Assembly …
2024年10月7日 · Employing grazing-incidence small-angle X-ray scattering (GISAXS) and X-ray reflectivity (XRR), we demonstrate that films composed of polyethylene glycol (PEG)-grafted silver nanoparticles (AgNP) and gold nanoparticles (AuNP), as well as their binary mixtures, form highly stable hexagonal structures at the vapor-liquid interface.
Using surface sensitive synchrotron grazing incidence small angle X-ray scattering (GISAXS) and specular X-ray reflectivity (XRR), we show that PEG-AuNRs in aqueous suspensions migrate to the...
Salt Mediated Self-Assembly of Poly(ethylene glycol)-Functionalized ...
2019年12月30日 · Using surface sensitive synchrotron grazing incidence small angle X-ray scattering (GISAXS) and specular X-ray reflectivity (XRR), we show that PEG-AuNRs in aqueous suspensions migrate to the...
XPS and AFM analysis of antifouling PEG interfaces for …
2004年9月15日 · The antifouling nature of PEG interfaces depends upon a range of parameters, including PEG molecular weight, PEG grafting density, polymer chain architecture, etc. In this study, we evaluated the antifouling nature of PEG interfaces of various grafting densities using fibrinogen as the model protein.
从理论到实践，一文搞懂X射线反射率 (XRR) - Westlake
2023年12月11日 · X射线反射率（X-ray reflectivity，XRR）是一种分析薄膜厚度、粗糙度、密度的表面分析方法。XRR的基本原理是利用X射线在薄膜表面及界面的反射及折射光的相互干涉，它和我们了解的XRD的衍射原理无关，因此XRR不止可以分析结晶薄膜，也可以分析无定形薄膜。
Temperature-activated PEG surface segregation controls the …
Poly(ethylene glycol) (PEG) is widely used to modulate the hydration states of biomaterials and is often applied to produce non-fouling surfaces. Here, we present X-ray scattering data which show that it is the surface segregation of PEG, not just ...
Synchrotron X-ray techniques for the investigation of structures …
2014年6月1日 · The techniques covered are, for structural determinations: X-ray reflectivity (XRR), grazing incidence X-ray diffraction (GIXRD) and grazing incidence X-ray excited fluorescence (GIXF), while dynamics are investigated by X-ray photon correlation spectroscopy (XPCS) mainly in the grazing-incidence geometry (GIXPCS).
Salt Mediated Self-Assembly of Poly(ethylene glycol ... - PubMed
2019年12月30日 · Using surface sensitive synchrotron grazing incidence small angle X-ray scattering (GISAXS) and specular X-ray reflectivity (XRR), we show that PEG-AuNRs in aqueous suspensions migrate to the vapor/liquid interface in the presence of salt, forming a uniform monolayer with planar-to-surface orientation.
Figure S2: (a) GISAXS patterns as functions of Qxy and Qz for …
Using surface sensitive synchrotron grazing incidence small angle X-ray scattering (GISAXS) and specular X-ray reflectivity (XRR), we show that PEG-AuNRs in aqueous suspensions migrate to the...
X射线反射率测试薄膜厚度 - 知乎 - 知乎专栏
2023年10月20日 · X射线反射率测试（XRR)是利用X射线在物质的表面和界面中发生的折射和反射，以及反射线之前的相互干涉所形成的干涉条纹对薄膜的性质进行研究的一种方法,可用于测量薄膜的密度、厚度、粗糙度等信息。 在测试时X射线以很小角度入射到样品表面,并以对称耦合模式和测量,即测试时入射角与反射角同步等步长增加,所以XRR一般也称为GIXRR（Grazing Incidence X-ray Reflection）。 本文简单介绍GIXRR基本原理和在高分子薄膜表征中的一些初步应用。 二 …