RECENTLY PUBLISHED ISSUES – BENTHAM SCIENCE JOURNALS

Current Drug Abuse Reviews 10-1

https://bit.ly/2Jt8249

Current Neuropharmacology 16-6

https://bit.ly/2MksJgw

Recent Advances in Electrical & Electronic Engineering 11-2

https://bit.ly/2HFV3pW

Recent Patents on Computer Science 10-4

https://bit.ly/2HFzMNf

Protein & Peptide Letters 25-4

https://bit.ly/2JC7eWw

Current Nanoscience 14-4

https://bit.ly/2y2631j

RIA

 

EDITOR’S CHOICE – Mechanical and Viscoelastic Properties of In-situ Amine Functionalized Multiple Layer Graphene /epoxy Nanocomposites – Current Nanoscience

Journal: Current Nanoscience

Author(s): Pradeep Kumar Singh*, Kamal Sharma*

Graphical Abstract:

 

Abstract:

Introduction: Graphene is flat monolayer of carbon atoms (one atom thick), covalently bonded to three other atoms in tightly packed two-dimensional (2D) hexagonal single layer stable crystalline honeycomb lattice structure. In this paper, In-situ amine functionalized exfoliated graphene with multiple layers (3-6) with low defect contents and average aspect ratio upto 10 microns (average X and Y dimensions) and thickness upto 2-3 nm (average Z-direction) which have been produced with the combined effort of chemical vapor deposition (CVD) and chemical graphite exfoliation method.

Methods: This paper also focuses on the effect of the reinforcement of amine functionalized multiple graphene layers (AF-MGL) on the mechanical and visco-elastic properties of epoxy composites. AFMGL/ epoxy composites (AF-MGL/EpC) were prepared with graphene fractions ranging from 0.5 to 2.0 wt%. The four different samples were prepared using an amount of graphene as 0.0, 0.5, 1.5, and 2.0. A series of tensile three point bend tests were performed on the different AFMGL/epoxy composites. Optical and scanning electron microscopy (SEM) was used to examine the micro structural features and fractured surfaces of AF-MGL/EpC.

Results: Increased graphene content results in improved tensile strength and the modulus of an epoxy matrix when compared with the pure epoxy matrix. The 1.5 wt% AF-MGL/EpC showed an increase in tensile strength and modulus by 50.2 and 52.8% respectively. However, a shrink was noticed beyond 1.5 wt.% samples of AF-MGL/EpC composite. Moreover, an improvement of 28.8% in the storage modulus was also recorded when compared with epoxy composites.

Conclusion: The effect of the amine functional group on the mechanical and viscoelastic properties was also explored using molecular dynamics (MD) simulations and predicted results were then compared with experimental results.

Read more here: http://www.eurekaselect.com/158477/article

 

OPEN ACCESS ARTICLE – Sensitive Capacitive-type Hydrogen Sensor Based on Ni Thin Film in Different Hydrogen Concentrations – Current Nanoscience

Journal: Current Nanoscience

Author(s): Ghobad Behzadi Pour*, Leila Fekri Aval, Shahnaz Eslami

Graphical Abstract:

 

Abstract:

Background: Hydrogen sensors are micro/nano-structure that are used to locate hydrogen leaks. They are considered to have fast response/recovery time and long lifetime as compared to conventional gas sensors. In this paper, fabrication of sensitive capacitive-type hydrogen gas sensor based on Ni thin film has been investigated. The C-V curves of the sensor in different hydrogen concentrations have been reported.

Method: Dry oxidation was done in thermal chemical vapor deposition furnace (TCVD). For oxidation time of 5 min, the oxide thickness was 15 nm and for oxidation time 10 min, it was 20 nm. The Ni thin film as a catalytic metal was deposited on the oxide film using electron gun deposition. Two MOS sensors were compared with different oxide film thickness and different hydrogen concentrations.

Results: The highest response of the two MOS sensors with 15 nm and 20 nm oxide film thickness in 4% hydrogen concentration was 87.5% and 65.4% respectively. The fast response times for MOS sensors with 15 nm and 20 nm oxide film thickness in 4% hydrogen concentration was 8 s and 21 s, respectively.

Conclusion: By increasing the hydrogen concentration from 1% to 4%, the response time for MOS sensor (20nm oxide thickness), was decreased from 28s to 21s. The recovery time was inversely increased from 237s to 360s. The experimental results showed that the MOS sensor based on Ni thin film had a quick response and a high sensitivity.

Read more here: http://www.eurekaselect.com/156059

 

RECENTLY PUBLISHED ISSUES – BENTHAM SCIENCE JOURNALS

Reviews on Recent Clinical Trials Volume 13, Issue 1
http://bit.ly/2BEm6T8

Central Nervous System Agents in Medicinal Chemistry Volume 18, Issue 1
http://bit.ly/2ohkDtE

Drug Delivery Letters Volume 8, Issue 1
http://bit.ly/2sK71wE

Current Nanoscience Volume 14, Issue 2
http://bit.ly/2EFSs2A

Current Nanomedicine Volume 8, Issue 1
http://bit.ly/2FgGuth

Current Gene Therapy Volume 17, Issue 5
http://bit.ly/2EFzFnY

Nanoscience & Nanotechnology-Asia Volume 8, Issue 1
http://bit.ly/2oiZsrl

Adolescent Psychiatry Volume 7, Issue 2
http://bit.ly/2HuVBAj

recent-issues

OPEN ACCESS ARTICLE – Early Stages of Antibacterial Damage of Metallic Nanoparticles by TEM and STEM-HAADF – Current Nanoscience

Journal: Current Nanoscience

Author(s): Beatriz Liliana Espana-Sanchez, Carlos Alberto Avila-Orta, Luis Felipe Padilla-Vaca, Enrique Diaz Barriga-Castro, Florentino Soriano-Corral, Pablo Gonzalez-Morones, Diana Guadalupe Ramirez-Wong, Gabriel Luna-Barcenas

Graphical Abstract:

 

Abstract:

Background: Propagation of pathogens has considered an important health care problem due to their resistance against conventional antibiotics. The recent challenge involves the design of functional alternatives such as nanomaterials, used as antibacterial agents. Early stages of antibacterial damage caused by metallic nanoparticles (NPs) were studied by Transmission Electron Microscopy (TEM) and combined Scanning Transmission Electron Microscopy with High Angle Annular Dark Field (STEM-HAADF), aiming to contribute to the elucidation of the primary antibacterial mechanism of metallic NPs.

Methods: We analyze the NPs morphology by TEM and their antibacterial activity (AA) with different amounts of Ag and Cu NPs. Cultured P. aeruginosa were interacted with both NPs and processed by TEM imaging to determine NPs adhesion into bacteria wall. Samples were analyzed by combined STEM-HAADF to determine the NPs penetration into bacterium and elemental mapping were done.

Results: Both NPs displays AA depending on NPs concentration. TEM images show NPs adhesion on bacterial cells, which produces morphological changes in the structure of the bacteria. STEMHAADF also proves the NPs adhesion and penetration by intracellular localization, detecting Ag/Cu species analyzed by elemental mapping. Moreover, the relative amount of phosphorus (P) and sulfur (S) increases slightly in P. aeruginosa with the presence of NPs. These elements are associated with damaged proteins of the outer cell membrane.

Conclusions: Combined microscopy analyses suggest that the early stages of antibacterial damage caused by alteration of bacterial cell wall, and can be considered a powerful tool aiming to understand the primary antibacterial mechanism of NPs.

Read more here: http://www.eurekaselect.com/155372

 

RECENTLY PUBLISHED ISSUES – BENTHAM SCIENCE JOURNALS

Recent Patents on Drug Delivery & Formulation 11-2

http://bit.ly/2lojMGi

Anti-Inflammatory & Anti-Allergy Agents in Medicinal Chemistry 16-2

http://bit.ly/2loocwQ

Current Medicinal Chemistry 24-39

http://bit.ly/2E8r5KN

Current Pharmaceutical Design 23-32

http://bit.ly/2CgJUNz

Current Nanoscience 14-1

http://bit.ly/2lpc0fj

Recent Patents on Biotechnology 12-1

http://bit.ly/2DudNam

 recent-issues

Highlighted Article – A Novel Non Electrically Prepared Nano Prussian Yellow Film Modified Electrode – Current Nanoscience

CN-Articles_13-6-Ibrahim ALGHORAIBI

http://benthamscience.com/journals/current-nanoscience/

Wishing A Very Happy Birthday to Prof. Dae Joon Kang!

prof. Dae Joon Kang.jpg

Prof. Dae Joon Kang

Editor-in-chief: Current Nanoscience

Sungkyunkwan University
Suwon
South Korea

Wishing A Very Happy Birthday to Dr. Atta-ur-Rahman!

Dr. Atta-ur-Rahman

Dr. Atta-ur-Rahman, FRS

Editor-in-Chief: Current Organic ChemistryMini Reviews in Medicinal ChemistryCurrent Medicinal Chemistry

Honorary Life Fellow
Kings College
University of Cambridge
Cambridge
UK

Podcast: A Review on Nanofluids for Machining – Current Nanoscience

Author(s): Harshit B. Kulkarni, Raviraj M. Kulkarni, Mahantesh M. Nadakatti, Maharudra S. Patil.

For article details, visit: http://www.eurekaselect.com/153569/article

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