Temperature–dependent electrophoretic mobility and hydrodynamic radius measurements of poly(N-isopropylacrylamide) microgel particles: structural insights

2000 ◽  
Vol 2 (14) ◽  
pp. 3187-3193 ◽  
Author(s):  
Emma Daly ◽  
Brian R. Saunders
Keyword(s):  
Electrophoretic Mobility ◽  
Hydrodynamic Radius ◽  
Temperature Dependent ◽  
Microgel Particles ◽  
Structural Insights

scholarly journals Temperature-Dependent Nanomechanical Properties of Adsorbed Poly-NIPAm Microgel Particles Immersed in Water

Langmuir ◽  
2021 ◽  
Vol 37 (5) ◽  
pp. 1902-1912
Author(s):  
Gen Li ◽  
Imre Varga ◽  
Attila Kardos ◽  
Illia Dobryden ◽  
Per M. Claesson
Keyword(s):  
Temperature Dependent ◽  
Nanomechanical Properties ◽  
Microgel Particles

Biocompatible, Polyampholyte Microgel Particles

2007 ◽  
Vol 60 (9) ◽  
pp. 646 ◽  
Author(s):  
Melanie Bradley ◽  
Brian Vincent ◽  
Gary Burnett
Keyword(s):  
Acid Hydrolysis ◽  
Electrophoretic Mobility ◽  
Methacrylic Acid ◽  
Butyl Methacrylate ◽  
Hydrodynamic Diameter ◽  
Swelling Properties ◽  
Ethyl Methacrylate ◽  
Monomer Composition ◽  
Microgel Particles ◽  
Hydrolysis Of

Biocompatible, polyampholyte microgel particles have been prepared by the acid hydrolysis of t-butyl groups within (2-diethylamino)ethyl methacrylate-co-t-butyl methacrylate microgel particles to give (2-diethylamino)ethyl methacrylate-co-methacrylic acid microgel particles. The hydrodynamic diameter and electrophoretic mobility of both the pre-hydrolyzed and post-hydrolyzed microgel particles have been investigated as a function of pH for three microgel dispersions differing in their monomer compositions. The swelling properties and isoelectric point pH are shown to depend on the monomer composition.

Anomalous electrophoretic mobility of microgel particles in buffer solutions

2006 ◽  
Vol 284 (8) ◽  
pp. 941-945
Author(s):  
B. Sierra-Martín ◽  
M. S. Romero-Cano ◽  
A. Fernández-Barbero
Keyword(s):  
Electrophoretic Mobility ◽  
Buffer Solutions ◽  
Microgel Particles

scholarly journals Quantitative X-ray microscopic analysis of individual thermoresponsive microgel particles in aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98228-98233 ◽  
Author(s):  
Andreas Späth ◽  
Birgit A. Graf-Zeiler ◽  
Gaio Paradossi ◽  
Shivkumar Ghugare ◽  
George Tzvetkov ◽  
...  
Keyword(s):  
Phase Transition ◽  
Aqueous Solution ◽  
High Resolution ◽  
Microscopic Analysis ◽  
Temperature Dependent ◽  
Transmission Microscopy ◽  
X Ray ◽  
Microgel Particles

The temperature dependent phase transition of individual thermoresponsive microgel particles in aqueous solution has been studied by high resolution soft X-ray transmission microscopy (STXM).

scholarly journals Temperature Controlled Loading and Release of the Anti-Inflammatory Drug Cannabidiol by Smart Microgels

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3181
Author(s):  
Maxim Dirksen ◽  
Timo Alexander Kinder ◽  
Timo Brändel ◽  
Thomas Hellweg
Keyword(s):  
Renewable Resources ◽  
Temperature Dependent ◽  
Hyperthermia Treatment ◽  
Normal Body Temperature ◽  
Inflammatory Drug ◽  
Microgel Particles ◽  
Collapse Temperature ◽  
Anti Inflammatory ◽  
Carrier Systems ◽  
Copolymer Microgels

CBD is a promising candidate for treatment of many diseases and plays a major role in the growing trend to produce high-end drugs from natural, renewable resources. In the present work, we demonstrate a way to incorporate the anti-inflammatory drug CBD into smart microgel particles. The copolymer microgels that we chose as carrier systems exhibit a volume phase transition temperature of 39 ∘C, which is just above normal body temperature and makes them ideal candidates for hyperthermia treatment. While a simple loading route of CBD was not successful due to the enormous hydrophobicity of CBD, an alternative route was developed by immersing the microgels in ethanol. Despite the expected loss of thermoresponsive behaviour of the microgel matrix due to the solvent exchange, a temperature-dependent release of CBD was detected by the material, creating an interesting question of interactions between CBD and the microgel particles in ethanol. Furthermore, the method developed for loading of the microgel particles with CBD in ethanol was further improved by a subsequent transfer of the loaded particles into water, which proves to be an even more promising approach due to the successful temperature-dependent release of the drug above the collapse temperature of the microgels.

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

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