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Journal of Nanomaterials & Molecular Nanotechnology
Editor-in-chief: Dennis W. Smith Jr., PhD
University of Texas at Dallas, USA
ISSN: 2324-8777
Frequency: Bimonthly
 
The Journal of Nanomaterials & Molecular Nanotechnology (JNMN) promotes rigorous research that makes a significant contribution in advancing knowledge for Nanomaterials and Molecular nanotechnology. JNMN includes all major themes pertaining to Nanotechnology.
 
Journal of Nanomaterials & Molecular Nanotechnology is a subscription based journal that provides a range of options to purchase our articles and also permits unlimited Internet Access to complete Journal content. It accepts research, review papers, online letters to the editors & brief comments on previously published articles or other relevant findings in SciTechnol. Articles submitted by authors are evaluated by a group of peer review experts in the field and ensures that the published articles are of high quality, reflect solid scholarship in their fields, and that the information they contain is accurate and reliable.
 
Current Issue
Editors & Editorial Board Members  
J Nanomater Mol Nanotechnol 2013, 2:7   
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Preparation of CdSe Quantum Dot Sensitized Solar Cells Based on Improved Successive Ionic Layer Absorption and Reaction Method   Research Article
Qiong Ma, Haihong Niu, Shengxian Qin, Xiaoli Mao, Renbao Wang, Lei Wan, Jinzhang Xu
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000128
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Preparation of CdSe Quantum Dot Sensitized Solar Cells Based on Improved Successive Ionic Layer Absorption and Reaction Method

In this work, we developed a universal strategy to prepare stork solutions of Na2Se sealed with methyl silicone oil which are used as a precursor for synthesis of CdSe quantum dots (QDs) via a successive ionic layer absorption and reaction (SILAR) method. As a model, the prepared CdSe QDs were applied on a mesoporous TiO2 photoanode, and QDs sensitized solar cells (QDSSCs) were derived. The photovoltaic performance of QDSSCs was investigated with respect to the thickness of TiO2 film and the SILAR cycles of CdSe QDs deposition. The ~12 μm thickness of mesoporous TiO2 films coated with 12 SILAR cycles of CdSe QDs affords the highest power conversion efficiency (PCE) 2.02% when the electrolyte containing 2 M sulfide, 0.5 M sodium sulfide, 0.2 M potassium chloride, and mixture solution of methanol/aqueous (7:3 v/v) was employed. The optimized photovoltaic parameters of QDSSCs were obtained as such: open-circuit voltage (Voc) 0.52V, short-circuit current density (Jsc) 10.69 mA/cm2 and fill factor (FF) 36.3%.

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Synthesis of Nonionic Dendrimer-like Star Block Copolymers Based on PCL and PEG as Stabilizer for Gold Nanoparticles   Research Article
Mohammad Reza Nabid, Roya Sedghi and Fatemeh Eskandari
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2327-4417.1000129
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Synthesis of Nonionic Dendrimer-like Star Block Copolymers Based on PCL and PEG as Stabilizer for Gold Nanoparticles

Here we report the preparation of nanocomposites from gold nanoparticles (AuNPs) coated with synthesized nonionic amphiphilic dendrimer-like star block copolymers (DLSPs).
At first, the 9G3(Poly(ethyleneglycol) (PEG))36 was synthesized in two main steps. A second-generation dendrimer-like star poly (ε-caprolactone) (PCL) was obtained through ring-opening polymerization (ROP) of ε-caprolactone (CL) from asymmetric 9-hydroxylated core. Subsequently, the amphiphilic G3-DLSPs was prepared via the coupling reaction of 36-end groups quantitatively with carboxyl-terminated MPEG-OH. The hydroxyl protected 2-bis (hydroxymethyl) propionic acid (BHMPA) as a conventional AB2- type branching agent was used. The self-assembly behavior of the obtained amphiphilic DLSPs was studied using 1H NMR and fluorescence spectroscopy (to determin critical micelle concentration (CMC) values). The small values of CMCs were suggesting the convenient stability of the DLSPs assemblies in aqueous media.

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Electrochemical Studies of Vitamin K3 and Its Interaction with Human Serum Albumin Using a Carbon Nanoparticles- Modified Electrode   Research Article
H Heli
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000130
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Electrochemical Studies of Vitamin K3 and Its Interaction with Human Serum Albumin Using a Carbon Nanoparticles- Modified Electrode

The electrochemical behavior of vitamin K3 on a carbon nanoparticles-modified glassy carbon electrode surface and its interaction with human serum albumin were investigated. The results showed that vitamin K3 is reduced in a two-electron step. The diffusion coefficients of vitamin K3 was determined. Also, the heterogeneous electron transfer rate constant and charge transfer coefficient were evaluated using cyclic voltammetry, impedance spectroscopy and steady-state polarization measurements. Upon addition of human serum albumin to the vitamin K3 solution, both the cathodic and anodic peak currents were decreased; however, binding vitamin K3 to human serum albumin formed an electroreactive species. The percentage of interaction of vitamin K3 with protein was addressed.

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Dietary Intake of (-)-Epigallocatechin-3-gallate against Aging and Cancers: Nanoencapsulation of Multi- Rings Still Requires New Rounds!   Research Article
Farid Menaa, Abder Menaa, Jacques Tréton and Bouzid Menaa
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000131
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Dietary Intake of (-)-Epigallocatechin-3-gallate against Aging and Cancers: Nanoencapsulation of Multi- Rings Still Requires New Rounds!

Polyphenols, a superfamily of naturally occurring phytochemicals, are gaining popularity because of their potential health benefits. Indeed, as demonstrated in ex-vivo and in non-primates models, they exert variable and pleiotropic biological effects (e.g. anti- or pro-oxidant, anti-inflammatory, anti-tumoral, anti-aging) depending on their structure and physicochemical features. However, these effects are often limited Carnauba wax by their overall unstability and bioavailability. The fact that some polyphenols act either as anti-oxidants (e.g. against aging) or as pro-oxidants (e.g. against tumors/cancers), remain an unsolved paradigm. Interestingly, emergent studies suggest that nano-encapsulated polyphenols might overcome some limitations frequently observed with dietary bulk-polyphenols (e.g. bioavailability, pharmacokinetics, targeting, efficacy, toxicity and safety), subsequently potentiating their biological effects. In this context, the case of (-)-epigallocatechin- 3-gallate (EGCG) is quite intriguing.

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Effect of Humidity on Structural Distortion and Conductance of DNA Nanowire   Research Article
Ram Ajore, Inderpreet Kaur, Harsimran Kaur and Lalit M Bharadwaj
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2327-4417.1000132
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Effect of Humidity on Structural Distortion and Conductance of DNA Nanowire

One of the intensively explored domains of the current bionanotechnology is the focus for search of nano-materials intended to develop high throughput electronic devices. Among the questioned physical materials deoxyribonucleic acid (DNA) has given promising background to be explored as potential nanowire material for aspiring nano-devices. The distinguished characteristics of electron hopping between DNA bases intrigues investigators to provide insights of the structrual properties of the DNA under varying relative humidity condition. Present manuscript attempts to provide insights for conductance of double stranded λ-DNA and its short stretch of intrinsic sequences in correspondence to structural distortion as a result of different relative humidity (RH) conditions.

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Effect of Neodymium Substitution on Structural and Magnetic Properties of Cobalt Ferrite Nanoparticles   Research Article
Sheena Xavier, SmithaThankachan, Binu P Jacob and E M Mohammed
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000133
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Effect of Neodymium Substitution on Structural and Magnetic Properties of Cobalt Ferrite Nanoparticles

A series of neodymium doped cobalt ferrite samples (CoFe2-xNdxO4 with x=0.0, 0.05, 0.1, 0.15, 0.2, 0.25) were prepared through the sol- gel technique. X-ray diffraction analysis confirmed the formation of spinel structure in all the samples. The lattice parameter and crystallite size of the samples increase with the increase in the concentration of neodymium. The FTIR spectrum analysis indicates the substitution of Fe3+ ions on octahedral sites by Nd3+ions. Transmission electron microscope observations revealed that the neodymium doped cobalt ferrite nanoparticles were roughly  spherical and slightly agglomerated. The saturation magnetization and coercivity decrease with increase in neodymium content and this is explained based on the particle size dependence of magnetic properties in the multidomain regime.

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Towards Methanol Electrooxidation: Comparative Study on Imidazolium and Guanidinium Ionic Liquids Supported Pt Nanocrystals on Carbon Nanotubes   Research Article
Shulian He, Liping Ding, Dechao Chen, Yunjin Yao,Wenhong Liu, Lei Wan, Jinzhang Xu and Shiding Miao
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000134
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Towards Methanol Electrooxidation: Comparative Study on Imidazolium and Guanidinium Ionic Liquids Supported Pt Nanocrystals on Carbon Nanotubes

In this work, two types of ionic liquids (ILs), 1-hexadecyl-3-methylimidazolium chloride (C16MIMCl) and 1,1,3,3-tetramethyl guanidinium bromide (TMGBr), were employed to assist the immobilization of Pt nanocrystals on carbon nanotubes (CNTs). It is found that the conjugated effects including the cations-π (C-N+•), π-π interactions and electrostatic interactions are the main drive forces between the quasi-aromatic imidazolium ring and pyrolytic graphite of CNTs in sample of C16MIM-CNTs-Pt. The interactions of intra-molecular hydrogen bonds (N+-H•••N) and electrostatic interactions are found in the guanidinium ILs assisted catalysts (TMG-CNTs-Pt). The conjugated effects induce the formation of Pt(II) complexes in the composites even after the platinum precursor (H2PtCl6•6H2O) was reduced by NaBH4. The catalysis investigation towards methanol oxidation carried out in acidic solution demonstrates that both ternary composite (C16MIM-CNTs- Pt and TMG-CNTs-Pt) catalysts exhibit higher electro-catalytic activity and better stability than the binary catalyst (CNTs-Pt) or the single-component catalyst (Pt nanocrystals).

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Synthesis of Poly(vinyl alcohol)-Silver Nanocomposites and Effect of CTAB on their Morphology   Research Article
Shaeel Ahmed AL-Thabaiti, Abdullah Yousif Obaid andZaheer Khan
J Nanomater Mol Nanotechnol 2013, 2:7    doi: 10.4172/2324-8777.1000135
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Synthesis of Poly(vinyl alcohol)-Silver Nanocomposites and Effect of CTAB on their Morphology

Nacre-like film of silver-polyvinyl alcohol (PVA-water soluble biologically friendly polymer) nanocomposites is prepared via chemical reduction method, using tyrosine as a catalytic and reducing agent. Preparing of silver-PVA ordered layered nanocomposites by this method is done for the first time. The Ag- nanoparticles were characterized using UV-Vis spectroscopy, which shows an absorption band at 400-475 nm confirming the formation of nanoparticles. The results accord the formation of silver nanoclusters in conjunction with nanoparticles. The Ag nanoparticles were adsorbed in the PVA matrix through electrostatic interactions. PVA capped silver nanoparticles with or without cetyltrimethylammonium bromide, CTAB lead to the formation of nanostructures of various geometric shapes and sizes. Viscosity of the CTAB-PVA mixture was also determined. The role of PVA composition on the optical properties of silver nanoparticles has been examined and discussed.

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