scholarly journals Effects of Mixing Mode on the Formation of Silica Nanoparticles Synthesized via Aqueous Sol-Gel Process

2010 ◽  
Vol 78 (3) ◽  
pp. 683-683
Author(s):  
T. ANDREANI
Keyword(s):  
Silica Nanoparticles ◽  
Sol Gel ◽  
Sol Gel Process

Preparation of superhydrophobic silica nanoparticles by microwave assisted sol–gel process

2011 ◽  
Vol 61 (1) ◽  
pp. 8-13 ◽  
Author(s):  
A. Santiago ◽  
A. González ◽  
J. J. Iruin ◽  
M. J. Fernández-Berridi ◽  
L. Irusta
Keyword(s):  
Silica Nanoparticles ◽  
Sol Gel ◽  
Microwave Assisted ◽  
Sol Gel Process ◽  
Superhydrophobic Silica

Preparation and Characterization of Paclitaxel Imprinted Silica Nanoparticles

2011 ◽  
Vol 399-401 ◽  
pp. 1894-1897
Author(s):  
Jian Hua Li ◽  
Zong Jian Zheng ◽  
Shao Ping Fu ◽  
Jing Bo Zhu
Keyword(s):  
Silica Nanoparticles ◽  
Dissociation Constants ◽  
Sol Gel ◽  
Scatchard Analysis ◽  
Binding Properties ◽  
Imprinted Polymers ◽  
Sol Gel Process ◽  
Equilibrium Dissociation Constants ◽  
Equilibrium Dissociation

Highly selective molecularly imprinted layer-coated silica nanoparticles for paclitaxel were synthesized by molecular imprinting technique with a sol–gel process on the supporter of silica nanoparticles. The morphology of the obtained polymers was characterized by scanning electron microscopy (SEM). The binding properties of the imprinted polymers were evaluated through the equilibrium rebinding experiments. Scatchard analysis revealed that two classes of binding sites were formed in the imprinted polymers with equilibrium dissociation constants of 0.0509 g•L-1and 0.0094 g•L-1, respectively. Paclitaxel and its analogue were employed for selectivity tests. The results indicated that the imprinted polymers exhibited good selectivity and specificity toward paclitaxel.

Characterization of Nanostructured Silica as Carrier for Insecticides Deltamethrin, Pyriproxyfen, and Chlorpyrifos and Testing the Insecticidal Efficacy Against Trogoderma granarium (Coleoptera: Dermestidae) Larvae

2019 ◽  
Vol 113 (1) ◽  
pp. 511-517
Author(s):  
Masumeh Ziaee ◽  
Asgar Babamir-Satehi
Keyword(s):  
Electron Microscopy ◽  
Silica Nanoparticles ◽  
Sol Gel ◽  
Sem Analysis ◽  
Efficient Treatment ◽  
Trogoderma Granarium ◽  
Transmission Electron ◽  
Insecticidal Efficacy ◽  
Sol Gel Process ◽  
Nanostructured Silica

Abstract Nanostructured silica can be used as a carrier of pesticides to enhance stability and controlled release of agrochemicals with an effective concentration on target pests. Silica nanoparticles (SNPs) were synthesized by sol–gel process and employed as a carrier of three different insecticides including deltamethrin, pyriproxyfen, and chlorpyrifos. The SNPs were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis and the insecticides-loaded in SNPs were characterized by transmission electron microscopy (TEM). The toxicity of insecticides alone and loaded in SNPs was evaluated against small and large larvae of Trogoderma granarium Everts on concrete surfaces. The immediate mortality was counted after 1, 3, and 7 d of exposure, and then surviving individuals were transferred to untreated surfaces for seven more days, with delayed mortality was recorded. Small larvae were more susceptible than large ones on all insecticide treatments. In addition, insecticides loaded in silica nanoparticles were more effective when compared with application of the insecticides alone. For immediate mortality, deltamethrin loaded in SNPs was the most efficient treatment causing 70.5% mortality on small and 55.5% mortality on large larvae after 7 d of exposure to the highest concentration. Pyriproxyfen loaded in SNPs caused low immediate mortality, but the mortality increased in delayed count indicated that the insecticide could control the larvae even after they have been removed from treated surfaces. It can be concluded that loading insecticides in SNPs could significantly increase their insecticidal efficiency, but this increase was compound-dependent.

Generation of a mesoporous silica MSU shell onto solid core silica nanoparticles using a simple two-step sol–gel process

2011 ◽  
Vol 47 (26) ◽  
pp. 7476 ◽  
Author(s):  
Joachim Allouche ◽  
Jean-Charles Dupin ◽  
Danielle Gonbeau
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Sol Gel ◽  
Solid Core ◽  
Sol Gel Process

scholarly journals Sol-gel Silica Nanoparticles in Medicine: A Natural Choice. Design, Synthesis and Products

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 2021 ◽  
Author(s):  
M. Clara Gonçalves
Keyword(s):  
Silica Nanoparticles ◽  
Human Life ◽  
Sol Gel ◽  
Sio2 Nanoparticles ◽  
Short Review ◽  
Biomimetic Synthesis ◽  
Medical Applications ◽  
Gene Target ◽  
Wide Range ◽  
Sol Gel Process

Silica is one of the most abundant minerals in the Earth’s crust, and over time it has been introduced first into human life and later into engineering. Silica is present in the food chain and in the human body. As a biomaterial, silica is widely used in dentistry, orthopedics, and dermatology. Recently amorphous sol-gel SiO2 nanoparticles (NPs) have appeared as nanocarriers in a wide range of medical applications, namely in drug/gene target delivery and imaging diagnosis, where they stand out for their high biocompatibility, hydrophilicity, enormous flexibility for surface modification with a high payload capacity, and prolonged blood circulation time. The sol-gel process is an extremely versatile bottom-up methodology used in the synthesis of silica NPs, offering a great variety of chemical possibilities, such as high homogeneity and purity, along with full scale pH processing. By introducing organic functional groups or surfactants during the sol-gel process, ORMOSIL NPs or mesoporous NPs are produced. Colloidal route, biomimetic synthesis, solution route and template synthesis (the main sol-gel methods to produce monosized silica nanoparticles) are compared and discussed. This short review goes over some of the emerging approaches in the field of non-porous sol-gel silica NPs aiming at medical applications, centered on the syntheses processes used.

A facile synthesis of highly water-soluble, core–shell organo-silica nanoparticles with controllable size via sol–gel process

2009 ◽  
Vol 340 (2) ◽  
pp. 202-208 ◽  
Author(s):  
Hongwei Du ◽  
Paul D. Hamilton ◽  
Matthew A. Reilly ◽  
André d’Avignon ◽  
Pramit Biswas ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Sol Gel ◽  
Water Soluble ◽  
Core Shell ◽  
Facile Synthesis ◽  
Sol Gel Process ◽  
Controllable Size

Silica nanoparticles obtained by microwave assisted sol–gel process: multivariate analysis of the size and conversion dependence

2010 ◽  
Vol 53 (3) ◽  
pp. 667-672 ◽  
Author(s):  
E. Mily ◽  
A. González ◽  
J. J. Iruin ◽  
L. Irusta ◽  
M. J. Fernández-Berridi
Keyword(s):  
Multivariate Analysis ◽  
Silica Nanoparticles ◽  
Sol Gel ◽  
Microwave Assisted ◽  
Sol Gel Process
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