Gold Nanoparticles Protected with pH and Temperature-Sensitive Diblock Copolymers

Langmuir ◽  
2007 ◽  
Vol 23 (10) ◽  
pp. 5352-5357 ◽  
Author(s):  
Markus Nuopponen ◽  
Heikki Tenhu
Keyword(s):  
Gold Nanoparticles ◽  
Diblock Copolymers ◽  
Temperature Sensitive

The studies on highly concentrated complex dispersions of gold nanoparticles and temperature-sensitive nanogels and their application as new blood-vessel-embolic materials with high-resolution angiography

2014 ◽  
Vol 2 (36) ◽  
pp. 6044-6053 ◽  
Author(s):  
Yingying Ma ◽  
Jiangshan Wan ◽  
Kun Qian ◽  
Shinan Geng ◽  
Nijun He ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Resolution ◽  
Blood Vessel ◽  
Au Nanoparticles ◽  
Blood Pool ◽  
Temperature Sensitive ◽  
Colloid Stability ◽  
Blood Pool Imaging ◽  
Embolic Materials

High colloid stability of highly concentrated Au nanoparticles (GNPs) for use in blood-pool imaging was achieved, using p(N-isopropylacrylamide-co-butyl methylacrylate) nanogels.

From multi-responsive tri- and diblock copolymers to diblock-copolymer-decorated gold nanoparticles: the effect of architecture on micellization behaviors in aqueous solutions

Soft Matter ◽  
2015 ◽  
Vol 11 (24) ◽  
pp. 4830-4839 ◽  
Author(s):  
Lichun Song ◽  
Hui Sun ◽  
Xiaolu Chen ◽  
Xia Han ◽  
Honglai Liu
Keyword(s):  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Diblock Copolymer ◽  
Triblock Copolymer ◽  
Diblock Copolymers ◽  
Stimuli Responsive ◽  
Aba Triblock Copolymer

This work reports on the aqueous stimuli-responsive behaviors of an ABA triblock copolymer, a BAB triblock copolymer, an AB diblock copolymer and citrate-based gold nanoparticles decorated with AB diblock copolymers.

scholarly journals Programming colloidal bonding using DNA strand-displacement circuitry

2020 ◽  
Vol 117 (11) ◽  
pp. 5617-5623 ◽  
Author(s):  
Xiang Zhou ◽  
Dongbao Yao ◽  
Wenqiang Hua ◽  
Ningdong Huang ◽  
Xiaowei Chen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Thermal Annealing ◽  
Constant Temperature ◽  
Room Temperature ◽  
Dna Nanotechnology ◽  
Structural Transformations ◽  
Temperature Sensitive ◽  
Strand Displacement ◽  
Dna Strand Displacement ◽  
Dna Strand

As a strategy for regulating entropy, thermal annealing is a commonly adopted approach for controlling dynamic pathways in colloid assembly. By coupling DNA strand-displacement circuits with DNA-functionalized colloid assembly, we developed an enthalpy-mediated strategy for achieving the same goal while working at a constant temperature. Using this tractable approach allows colloidal bonding to be programmed for synchronization with colloid assembly, thereby realizing the optimal programmability of DNA-functionalized colloids. We applied this strategy to conditionally activate colloid assembly and dynamically switch colloid identities by reconfiguring DNA molecular architectures, thereby achieving orderly structural transformations; leveraging the advantage of room-temperature assembly, we used this method to prepare a lattice of temperature-sensitive proteins and gold nanoparticles. This approach bridges two subfields: dynamic DNA nanotechnology and DNA-functionalized colloid programming.

Hybrid Microgels Containing Gold Nanoparticles

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Andrij Pich ◽  
Arpita Karak ◽  
Yan Lu ◽  
Anup K. Ghosh ◽  
Hans-Juergen P. Adler
Keyword(s):  
Gold Nanoparticles ◽  
Sodium Citrate ◽  
Colloidal Stability ◽  
Nano Particles ◽  
Composite Particles ◽  
Temperature Sensitive ◽  
Chloroauric Acid ◽  
Gold Nano Particles ◽  
Hybrid Microgels

AbstractIn present paper we report on a preparation of hybrid microgels filled with gold nano-particles (AuNPs). Temperature-sensitive VCL/AAEM microgels have been used as containers for deposition of Au by in situ formation of gold nano-particles. Synthesis of AuNPs has been performed by two methods: a) reduction of chloroauric acid with sodium borhydride and b) reduction of chloroauric acid by sodium citrate under ultrasonic agitation. In both cases AuNPs were deposited directly into microgels leading to formation of composite particles which exhibit temperature-sensitive properties, tunable gold contents and high colloidal stability. The influence of Au load on microgel size, morphology, swellingdeswelling behaviour and stability is discussed.

scholarly journals Radiolytic synthesis of gold nanoparticles in HEMA-based hydrogels: Potentialities for imaging nanocomposites

Nukleonika ◽  
2021 ◽  
Vol 66 (4) ◽  
pp. 165-177
Author(s):  
Katsiaryna Dziarabina ◽  
Uliana Pinaeva ◽  
Sławomir Kadłubowski ◽  
Piotr Ulański ◽  
Xavier Coqueret
Keyword(s):  
Gold Nanoparticles ◽  
Monomer Conversion ◽  
Thermomechanical Properties ◽  
Temperature Sensitive ◽  
Trimethylammonium Chloride ◽  
Stimuli Responsive ◽  
Monomer Composition ◽  
Swelling Characteristics ◽  
High Degree ◽  
Radiolytic Synthesis

Abstract This article reports on the radiolytic synthesis of nanocomposites containing gold nanoparticles (AuNPs) within two types of hydrogels based on 2-hydroxyethyl methacrylate (HEMA): (i) plain networks with various contents in ethylene glycol dimethacrylate (EGDMA), as a cross-linker and (ii) stimuli-responsive (SR) networks prepared from these monomers copolymerized with [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MADQUAT) to confer pH-switchable swelling. Hydrogels were prepared by photopolymerization with well-defined composition and a high degree of monomer conversion using two experimental procedures, as xerogels or in aqueous solution. Besides MADQUAT, acrylic acid (AA) or N-isopropylacrylamide have been tested as copolymers, yielding pHor temperature-sensitive hydrogels, respectively. Isothermal swelling in water was affected by monomer composition. Electron beam (EB) irradiation at doses up to 100 kGy of poly(HEMA) xerogels and water-swollen networks prepared with 0.5 wt% of EGDMA had a moderate impact on swelling characteristics and thermomechanical properties of the plain materials, whereas small amounts of extractables were formed. Poly(HEMA)-based nanocomposites containing AuNPs were successfully obtained by EB irradiation of samples swollen by aqueous solutions of Au(III). The effects of dose and cross-linking density on the formation of AuNPs were monitored by UV-visible spectroscopy. Irradiation at well-defined temperatures of the Au(III)-loaded SR hydrogels induced the formation of nanoparticles with size-dependent features, whereas the efficiency of Au(III) reduction at 10 kGy was not significantly affected by the network structure. EB-induced reduction of Au(III) in poly(HEMA) hydrogels using a lead mask to generate well-defined patterns yielded coloured and long-lasting images in the zones where the nanocomposite was formed.

Dual CO2/temperature-responsive diblock copolymers confer controlled reversible emulsion behavior

2019 ◽  
Vol 10 (21) ◽  
pp. 2641-2646 ◽  
Author(s):  
Yeong-Tarng Shieh ◽  
Pei-Yu Tai ◽  
Chih-Chia Cheng
Keyword(s):  
Diblock Copolymers ◽  
Temperature Sensitive ◽  
Stimuli Responsive ◽  
Temperature Responsive

Dual-stimuli responsive diblock copolymers possessing unique temperature-sensitive and CO2/N2-switching ability were successfully developed to promote efficient manipulation of reversible emulsification processes.

Temperature sensitive p(N-isopropylacrylamide-co-acrylic acid) modified gold nanoparticles for trans-arterial embolization and angiography

2017 ◽  
Vol 5 (5) ◽  
pp. 907-916 ◽  
Author(s):  
Yiming Liu ◽  
Xiaole Peng ◽  
Kun Qian ◽  
Yingying Ma ◽  
Jiangshan Wan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Acrylic Acid ◽  
Blood Vessel ◽  
Arterial Embolization ◽  
Temperature Sensitive ◽  
X Ray ◽  
X Ray Imaging

Temperature-sensitive in situ hydrogels of GNP@PNA nanomedicine achieve good blood-vessel embolization and X-ray imaging on rabbits.

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