scholarly journals Hydrogen bonding directed co-assembly of polyoxometalates and polymers to core–shell nanoparticles

2018 ◽  
Vol 2 (11) ◽  
pp. 2070-2075 ◽  
Author(s):  
Jing Zhou ◽  
Jie Hu ◽  
Mu Li ◽  
Hui Li ◽  
Weiyu Wang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hybrid Nanoparticles ◽  
Core Shell ◽  
General Strategy ◽  
Hydrogen Bonding Interaction ◽  
Shell Nanoparticles ◽  
Bonding Interaction ◽  
Core Shell Nanoparticles

A general strategy has been developed to co-assemble polyoxometalates and polymers into core–shell hybrid nanoparticles via hydrogen bonding interaction.

scholarly journals Core@shell Nanoparticles: Greener Synthesis Using Natural Plant Products

2018 ◽  
Vol 8 (3) ◽  
pp. 411 ◽  
Author(s):  
Mehrdad Khatami ◽  
Hajar Alijani ◽  
Meysam Nejad ◽  
Rajender Varma
Keyword(s):  
Large Scale ◽  
Hybrid Nanoparticles ◽  
Target Cells ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Environmental Friendliness ◽  
Shell Nanostructures ◽  
Greener Synthesis ◽  
Core Shell Nanoparticles ◽  
Synthesis Of Nanostructures

Among an array of hybrid nanoparticles, core-shell nanoparticles comprise of two or more materials, such as metals and biomolecules, wherein one of them forms the core at the center, while the other material/materials that were located around the central core develops a shell. Core-shell nanostructures are useful entities with high thermal and chemical stability, lower toxicity, greater solubility, and higher permeability to specific target cells. Plant or natural products-mediated synthesis of nanostructures refers to the use of plants or its extracts for the synthesis of nanostructures, an emerging field of sustainable nanotechnology. Various physiochemical and greener methods have been advanced for the synthesis of nanostructures, in contrast to conventional approaches that require the use of synthetic compounds for the assembly of nanostructures. Although several biological resources have been exploited for the synthesis of core-shell nanoparticles, but plant-based materials appear to be the ideal candidates for large-scale green synthesis of core-shell nanoparticles. This review summarizes the known strategies for the greener production of core-shell nanoparticles using plants extract or their derivatives and highlights their salient attributes, such as low costs, the lack of dependence on the use of any toxic materials, and the environmental friendliness for the sustainable assembly of stabile nanostructures.

scholarly journals Construction of core-shell hybrid nanoparticles templated by virus-like particles

RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56328-56334 ◽  
Author(s):  
A. Liu ◽  
L. Yang ◽  
M. Verwegen ◽  
D. Reardon ◽  
J. J. L. M. Cornelissen
Keyword(s):  
Hybrid Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Virus Like Particles ◽  
Catalytically Active ◽  
Silica Core ◽  
Core Shell Nanoparticles ◽  
Ph Controlled

Catalytically active gold in silica core–shell nanoparticles are prepared by pH controlled templating on virus-like particles.

scholarly journals In Situ Enhanced Raman and Photoluminescence of Bio-Hybrid Ag/Polymer Nanoparticles by Localized Surface Plasmon for Highly Sensitive DNA Sensors

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 631 ◽  
Author(s):  
Seokho Kim ◽  
Bo-Hyun Kim ◽  
Young Ki Hong ◽  
Chunzhi Cui ◽  
Jinho Choi ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Self Assembly ◽  
Hybrid Nanoparticles ◽  
Localized Surface Plasmon ◽  
Raman Signal ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Enhanced Photoluminescence ◽  
Target Dna ◽  
Core Shell Nanoparticles

We experimentally demonstrate the simultaneous enhancement of Raman and photoluminescence (PL) of core-shell hybrid nanoparticles consisting of Ag (core) and polydiacetylene (PDA, shell) through the assistance of localized surface plasmon (LSP) effect for the effective biosensor. Core-shell nanoparticles (NPs) are fabricated in deionized water through a sequential process of reprecipitation and self-assembly. The Raman signal of PDA on core-shell NPs is enhanced more than 100 times. Also, highly enhanced photoluminescence is observed on Ag/PDA hybrid NPs after coupling of the complementary t-DNA with p-DNA which are immobilized on PDA shell. This indicates that the core Ag affects the Raman and PL of PDA through the LSP resonance, which can be caused by the energy and/or charge transfer caused by the LSP coupling and the strong electromagnetic field near Ag NP surface. Only electrons present on the surface interact with the PDA shell, not involving the electrically neutral part of the electrons inside the Ag NP. Furthermore, this work shows that as prepared Ag/PDA NPs functionalized by probe DNA can sense the target DNA with an attomolar concentration (100 attomole).

scholarly journals Characterization of the Core−Shell Nanoparticles Formed as Soluble Hydrogen-Bonding Interpolymer Complexes at Low pH

Langmuir ◽  
2007 ◽  
Vol 23 (22) ◽  
pp. 11252-11258 ◽  
Author(s):  
Maria Sotiropoulou ◽  
Frederic Bossard ◽  
Eric Balnois ◽  
Julian Oberdisse ◽  
Georgios Staikos
Keyword(s):  
Hydrogen Bonding ◽  
Low Ph ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Interpolymer Complexes ◽  
The Core ◽  
Core Shell Nanoparticles

Radical Enzymes Control the Chemistry of Their Highly Reactive Intermediates Using the Quantum Coulombic Effect

2020 ◽  
Author(s):  
Hossein Khalilian ◽  
Gino A. DiLabio
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Orbital ◽  
Reactive Intermediates ◽  
Hydrogen Bonding Interaction ◽  
Orbital Ordering ◽  
Dynamic Nature ◽  
Radical Intermediate ◽  
Highest Occupied Molecular Orbital ◽  
Bonding Interaction ◽  
Close Proximity

Here, we report an exquisite strategy that the B12 enzymes exploit to manipulate the reactivity of their radical intermediate (Adenosyl radical). Based on the quantum-mechanic calculations, these enzymes utilize a little known long-ranged through space quantum Coulombic effect (QCE). The QCE causes the radical to acquire an electronic structure that contradicts the Aufbau Principle: The singly-occupied molecular orbital (SOMO) is no longer the highest-occupied molecular orbital (HOMO) and the radical is unable to react with neighbouring substrates. The dynamic nature of the enzyme and its structure is expected to be such that the reactivity of the radical is not restored until it is moved into close proximity of the target substrate. We found that the hydrogen bonding interaction between the nearby conserved glutamate residue and the ribose ring of Adenosyl radical plays a crucial role in manipulating the orbital ordering

Radical Enzymes Control the Chemistry of Their Highly Reactive Intermediates Using the Quantum Coulombic Effect

2020 ◽  
Author(s):  
Hossein Khalilian ◽  
Gino A. DiLabio
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Orbital ◽  
Reactive Intermediates ◽  
Hydrogen Bonding Interaction ◽  
Orbital Ordering ◽  
Dynamic Nature ◽  
Radical Intermediate ◽  
Highest Occupied Molecular Orbital ◽  
Bonding Interaction ◽  
Close Proximity

Here, we report an exquisite strategy that the B12 enzymes exploit to manipulate the reactivity of their radical intermediate (Adenosyl radical). Based on the quantum-mechanic calculations, these enzymes utilize a little known long-ranged through space quantum Coulombic effect (QCE). The QCE causes the radical to acquire an electronic structure that contradicts the Aufbau Principle: The singly-occupied molecular orbital (SOMO) is no longer the highest-occupied molecular orbital (HOMO) and the radical is unable to react with neighbouring substrates. The dynamic nature of the enzyme and its structure is expected to be such that the reactivity of the radical is not restored until it is moved into close proximity of the target substrate. We found that the hydrogen bonding interaction between the nearby conserved glutamate residue and the ribose ring of Adenosyl radical plays a crucial role in manipulating the orbital ordering

Preparation and Electrocatalytic Performance of Thin-shell Ni/Pt Core-shell Nanoparticles

2012 ◽  
Vol 27 (1) ◽  
pp. 95-101
Author(s):  
Shi-Bin LIU ◽  
Chun-Ying YANG ◽  
Zhong-Lin ZHANG ◽  
Dong-Hong DUAN ◽  
Xiao-Gang HAO ◽  
...  
Keyword(s):  
Thin Shell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Electrocatalytic Performance ◽  
Core Shell Nanoparticles
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