scholarly journals A facile approach to prepare silica hybrid, spin-crossover water-soluble nanoparticles as a potential platform for thermally responsive MRI agents

2021 ◽  
Author(s):  
Patroula Golfi ◽  
Dimitra Tsivaka ◽  
Ioannis Tsougos ◽  
Katerina Vassiou ◽  
Ondrej Malina ◽  
...  
Keyword(s):  
Reverse Micelle ◽  
Spin Crossover ◽  
Water Soluble ◽  
Thermally Responsive ◽  
Soluble Silica ◽  
Silica Hybrid

A reverse micelle method was used for the synthesis of water soluble silica hybrid, spin-crossover (SCO) nanoparticles (NPs). MRI experiments provided thermally responsive T2 values indicating their potential usage as...

Electrical and Optical Properties of Self-Assembled, Ordered Gold Nanocrystal/Silica Thin Films Prepared by Sol-Gel Processing

2005 ◽  
Vol 872 ◽  
Author(s):  
Kai Yang ◽  
Hongyou Fan ◽  
Michael J. O'Brien ◽  
Sima La Fontaine ◽  
Gabriel P. Lopez ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Sol Gel ◽  
Water Soluble ◽  
Oxide Semiconductor ◽  
Excitation Spectra ◽  
Soluble Silica ◽  
Strong Surface ◽  
Gold Nanocrystal

AbstractHighly ordered gold NC/silica films are synthesized by self-assembly of water-soluble gold nanocrystal micelles and soluble silica using a sol-gel spin-coating technique. The optical properties are analyzed using ellipsometry and ultraviolet-visible spectroscopy. The absorption spectra show a strong surface plasmon absorption band at ∼520 nm for all samples. Angular excitation spectra of the surface plasmon show a steep dip in the reflectivity curve at ∼65°. Charge transport behavior of the films is examined using metal-oxide-semiconductor (MOS) structures.MOS capacitor samples exhibit charge storage with discharge behavior dominated by electron transport within the gold NC arrays.

Bright Phosphorescence of All-Organic Chromophores Confined within Water-Soluble Silica Nanoparticles

2019 ◽  
Vol 123 (49) ◽  
pp. 29884-29890 ◽  
Author(s):  
Marco Villa ◽  
Benedetta Del Secco ◽  
Luca Ravotto ◽  
Myriam Roy ◽  
Enrico Rampazzo ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Water Soluble ◽  
Organic Chromophores ◽  
Soluble Silica

Nanoparticles of [Fe(NH2-trz)3]Br2⋅3 H2O (NH2-trz=2-Amino-1,2,4-triazole) Prepared by the Reverse Micelle Technique: Influence of Particle and Coherent Domain Sizes on Spin-Crossover Properties

2009 ◽  
Vol 15 (25) ◽  
pp. 6122-6130 ◽  
Author(s):  
Thibaut Forestier ◽  
Abdellah Kaiba ◽  
Stanislav Pechev ◽  
Dominique Denux ◽  
Philippe Guionneau ◽  
...  
Keyword(s):  
Reverse Micelle ◽  
Spin Crossover ◽  
Coherent Domain

scholarly journals FORMULATION OF NANOPARTICLES OF EPROSARTAN MESYLATE FOR THE BETTER DRUG DELIVERY BY IMPROVING SOLUBILITY

2018 ◽  
Vol 11 (10) ◽  
pp. 260
Author(s):  
Upasana Yadav ◽  
Nuzhat Husain ◽  
Qamar Rehman
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Particle Size ◽  
Drug Release ◽  
Reverse Micelle ◽  
Water Soluble ◽  
Aggregation State ◽  
Microemulsion Method ◽  
Pure Drug ◽  
Reverse Micellar

Objective: In the present study, we have made an attempt to the developed formulation of nanoparticles (NPs) of eprosartan mesylate (EM) incorporated in carboxymethyl chitosan using reverse micelle technique for the better drug delivery by improving solubility.Methods: The NPs size and morphology were investigated by high-resolution transmission electron microscopy and field emission scanning electron microscopy, respectively. The physical and chemical aggregation state of eprosartan was analyzed using ultraviolet spectroscopy, and Fourier transforms infrared spectroscopy.Results: To increase the solubility of eprosartan by reverse micelle technique of the drug through polymeric NPs is an alternative efficient, option for increasing the solubility. Eprosartan nanosuspension was successfully formulated for dissolution and bioavailability enhancement of the drug. The percentage drug release pattern of both formulations was compared against that of pure drug. It shows that in 10 min 39% and 17% of drug was released from the NPs made by RM method and microemulsion method, respectively, as compared to that of 1.3% of the pure drug. In 50 min almost more than half 51% of the drug was released from NPs by microemulsion method whereas only 2.5% of the drug was released from NPs containing the pure drug. In 120 min 67% of the drug was released from NPs by microemulsion method whereas only 5.8% of drug release was shown by NPs with the pure drug. We are paying attention on evaluating the influence of particle size and crystalline state on the in vitro performance of eprosartan.Conclusion: In summary, we have developed a new approach toward the delivery of poorly water-soluble drug eprosartan by reverse micellar method. The particle size of NPs obtained by the reverse micellar method was significantly reduced as compared to the other method.

scholarly journals Highly Water-Soluble Thermally Responsive Poly(thiophene)-Based Brushes

2005 ◽  
Vol 44 (31) ◽  
pp. 4872-4876 ◽  
Author(s):  
Sreelatha S. Balamurugan ◽  
Grigor B. Bantchev ◽  
Yuming Yang ◽  
Robin L. McCarley
Keyword(s):  
Water Soluble ◽  
Thermally Responsive

Highly bright water-soluble silica coated quantum dots with excellent stability

2014 ◽  
Vol 2 (31) ◽  
pp. 5043-5051 ◽  
Author(s):  
Yunfei Ma ◽  
Yan Li ◽  
Shijian Ma ◽  
Xinhua Zhong
Keyword(s):  
Quantum Dots ◽  
Water Soluble ◽  
Stöber Method ◽  
Soluble Silica ◽  
Excellent Stability

A facile Stöber method for the synthesis of isolated silica coated QDs with high PL efficiencies, tunable small size and excellent stability leads to the practical bioapplication as robust biomarkers.

Adsorption Study of Reactive Dyes on Cotton Fabric in Non-Aqueous Systems

2012 ◽  
Vol 550-553 ◽  
pp. 671-675 ◽  
Author(s):  
Shi Xiong Yi ◽  
Yong Chun Dong
Keyword(s):  
Adsorption Capacity ◽  
Cotton Fabric ◽  
Reverse Micelle ◽  
Adsorption Property ◽  
Reactive Dyes ◽  
Reactive Dye ◽  
Water Soluble ◽  
Ionic Surfactant ◽  
Isotherm Equation ◽  
Langmuir Isotherm Equation

Abstract: The non-ionic reverse micelles used for dyeing cotton fabric were prepared with a non-ionic surfactant Triton X-100 (TX-100) by injecting small amount of reactive dye aqueous solution. The effect of electrolyte on the adsorption capacity of reactive dyes onto cotton fabric in this system was studied. And the adsorption properties of three water-soluble anionic azo dyes including Reactive Blue 222, Reactive Red 195 and Reactive Yellow 145 onto cotton fabric in TX-100 reverse micelle were also studied and compared. The results indicated that reactive dyes showed a better adsorption property on cotton fabric in TX-100 reverse micelle without the addition of NaCl. The adsorption of the dyes onto cotton showed better agreement with Langmuir isotherm equation. Reactive Yellow 145 with lower negative charge and higher hydrophilicity exhibited the higher adsorption capacity than the other dyes. The adsorption process follows by the chemical adsorption.

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