Growth Behavior of Gold Nanorods Synthesized by the Seed-Mediated Method: Tracking of Reaction Progress by Time-Resolved X-ray Absorption Near-Edge Structure, Small-Angle X-ray Scattering, and Ultraviolet–Visible Spectroscopy

2018 ◽  
Vol 122 (14) ◽  
pp. 7982-7991 ◽  
Author(s):  
Yoshikiyo Hatakeyama ◽  
Koh Sasaki ◽  
Ken Judai ◽  
Keiko Nishikawa ◽  
Kazuyuki Hino
Keyword(s):  
Gold Nanorods ◽  
Small Angle ◽  
Growth Behavior ◽  
Visible Spectroscopy ◽  
Time Resolved ◽  
Edge Structure ◽  
Reaction Progress ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Absorption

Small-angle X-ray scattering and X-ray absorption near-edge structure study of iron-doped siloxane-polyoxyethylene nanocomposites

2003 ◽  
Vol 36 (3) ◽  
pp. 405-409 ◽  
Author(s):  
L.A Chiavacci ◽  
K Dahmouche ◽  
C.V Santilli ◽  
V de Zea Bermudez ◽  
L.D Carlos ◽  
...  
Keyword(s):  
Small Angle ◽  
Structure Study ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Iron Doped ◽  
X Ray Absorption ◽  
Ray Scattering

Continuous flow time-resolved small-angle x-ray scattering and X-ray absorption spectroscopy

2016 ◽  
Vol 44 (5) ◽  
pp. 537-546
Author(s):  
Guang Mo ◽  
Zhonghua Wu ◽  
Quan Cai ◽  
Zhihong Li ◽  
Xueqing Xing ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Small Angle ◽  
Continuous Flow ◽  
Flow Time ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
X Ray Absorption ◽  
Ray Scattering

Time-Resolved Small-Angle X-ray Scattering Study on the Growth Behavior of Silver Nanoparticles

2014 ◽  
Vol 118 (21) ◽  
pp. 11454-11463 ◽  
Author(s):  
Shi Yan ◽  
Zhonghua Wu ◽  
Hongying Yu ◽  
Yu Gong ◽  
Yuanyuan Tan ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Small Angle ◽  
Growth Behavior ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Study ◽  
Ray Scattering

In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Hao Wu ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Matthew Tirrell
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Polyelectrolyte Complex ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

scholarly journals Osmotic shrinkage of sterically stabilized liposomes as revealed by time-resolved small-angle X-ray scattering

2014 ◽  
Vol 47 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Zoltán Varga ◽  
András Wacha ◽  
Attila Bóta
Keyword(s):  
Form Factor ◽  
Small Angle ◽  
Freeze Fracture ◽  
Initial Step ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Sterically Stabilized Liposomes ◽  
Liposome Size ◽  
Ray Scattering

Time-resolved synchrotron small-angle X-ray scattering (SAXS) was used to study the structural changes during the osmotic shrinkage of a pharmacologically relevant liposomal drug delivery system. Sterically stabilized liposomes (SSLs) with a diameter of 100 nm and composed of hydrogenated soy phosphocholine, cholesterol and distearoyl-phosphoethanolamine-PEG 2000 prepared in a salt-free buffer were mixed with a buffered 0.3 MNaCl solution using a stopped flow apparatus. The changes in the liposome size and the bilayer structure were followed by using SAXS with a time resolution of 20 ms. A linear decrease in liposome size is observed during the first ∼4 s of the osmotic shrinkage, which reveals a water permeability value of 0.215 (15) µm s−1. The change in the size of the liposomes upon the osmotic shrinkage is also confirmed by dynamic light scattering. After this initial step, broad correlation peaks appear on the SAXS curves in theqrange of the bilayer form factor, which indicates the formation of bi- or oligolamellar structures. Freeze-fracture combined with transmission electron microscopy revealed that lens-shaped liposomes are formed during the shrinkage, which account for the appearance of the quasi-Bragg peaks superimposed on the bilayer form factor. On the basis of these observations, it is proposed that the osmotic shrinkage of SSLs is a two-step process: in the initial step, the liposome shrinks in size, while the area/lipid adapts to the decreased surface area, which is then followed by the deformation of the spherical liposomes into lens-shaped vesicles.

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