Journal of Materials NanoScience <p>Journal of Materials NanoScience is a peer reviewed international journal for publication of high impact quality research articles in field of NanoScience, Nanotechnology, Nanomaterials, Nanobiotechnology, Nanomedicine, and research at nanoscale towards development of smart materials.</p> en-US (Editorial, J Material NanoScience) (Technical Support, ScienceIn) Thu, 02 Jan 2020 00:00:00 +0000 OJS 60 Role of polarized tip-enhanced Raman spectroscopy in the enhancement of interface optical phonon modes in AlGaN multi-quantum wells <p>Group III nitride based two-dimensional multi-quantum well (MQW) nanostructures find remarkable applications in the visible to ultraviolet light sources. The interface optical (IFO) phonon modes in a <em>c</em>-axis oriented superlattice of [Al<sub>0.35</sub>Ga<sub>0.65</sub>N (~1.75 nm)/Al<sub>0.55</sub>Ga<sub>0.45</sub>N (~2nm)]<sub>20 </sub>MQWs are observed using tip-enhanced Raman spectroscopic (TERS) studies. The near-field studies using TERS probe with an Au spherical nanoparticle of ~ 200 nm&nbsp;diameter were carried out at ambient conditions showing approximately two to three orders of enhancement in the Raman intensities.&nbsp; The interface phonon mode belonging to <em>E</em><sub>1</sub> symmetry [IFO(<em>E</em><sub>1</sub>)] vibrating normal to the <em>c</em>-axis of MQWs appeared to be more prominent in the case of TERS measurement compared to that for the other interface phonon mode of <em>A</em><sub>1</sub> symmetry. The confined electric field of the polarized electro-magnetic excitation using TERS probe, parallel to the plane of the interface of MQW, is made responsible for the plasmonic enhancement of IFO(<em>E</em><sub>1</sub>) phonon mode. The confinement was verified using finite-difference time-domain simulation.</p> A.K. Sivadasan, Prajit Dhara, Chirantan Singha, Raktima Basu, Santanu Parida, A. Bhattacharyya, Kishore K. Madapu, Sandip Dhara Copyright (c) 2020 ScienceIn Publishing Thu, 02 Jan 2020 00:00:00 +0000 Curcumin loaded Silica Nanoparticles and their therapeutic applications: A review <p>Silica nanoparticles offer a promising platform for the delivery of drugs, in particular for the drugs which lack water solubility, target capability and have non-specific distribution, systematic toxicity and low therapeutic index. In this review, we focus on the synthesis and therapeutic (particularly, anti-cancer) applications of Curcumin loaded Silica Nanoparticles. Various surface modifications of silica nanoparticles have been discussed that are used to enhance their therapeutic applications. The characterization techniques and study of their biocompatibility have also been presented.</p> Parul Pant, Dr. Chetna Gupta, Sagar Kumar, Apoorva Grewal, Shivani Garg, Aishwarya Rai Copyright (c) 2020 ScienceIn Publishing Mon, 06 Jan 2020 00:00:00 +0000 Doxorubicin-loaded magnetic nanoparticles downregulate expression of anti-apoptotic genes in resistant breast cancer cells Serap YAlç?n, Pelin Mutlu, Gözde Unsoy, Rouhollah Khodadust, Ufuk Gunduz Copyright (c) 2020 ScienceIn Publishing Mon, 22 Jun 2020 00:00:00 +0000 Synthesis of blue light emitting 5-carboxylicacid-2-arylsubstituted benzimidazoles as photosensitizers for dye-sensitized solar cells <p>A series of 5-Carboxylic Acid-2-Aryl substituted Benzimidazoles <strong>3a-c</strong>, were synthesized and their Photo- physical, Electrochemical and DSSCs performance were studied. The UV-vis absorption and Photoluminescence (PL) Spectra of the compounds <strong>3b</strong> and <strong>3c</strong> exhibited intense deep-blue emissions with PL maximum at around 380, 382 and 400 nm (Fig. 3). Incidentally, their PL quantum yields (?f) in solutions were found to be 0.36, 041 and 0.46 respectively. Thus, their emission spectrum displayed a broad FWHM feature extending to a longer-wavelength region, promoting the <em>y </em>value of the CIE resulting in a sky-blue emission of the Dyes <strong>3a-c</strong>. Further, the good thermal stability and small FWHMs of the dyes <strong>3a-c</strong> indicates as promising compounds for deep-blue emitters in OLEDs. The Photovoltaic performances of the Solar Cells fabricated from the prepared Electrodes under AM1.5 Solar irradiation (85&nbsp;mW/cm<sup>2</sup>) are shown in Fig.&nbsp;6. The Short-circuit Current Density (<em>J</em><sub>SC</sub>), Open-circuit Voltage (<em>V</em><sub>OC</sub>), Fill Factor (FF) and overall Conversion Efficiency (<em>?</em>) clearly reveals that the Dye <strong>3c</strong> shows higher efficiency (2.87 %) contributed by high value of <em>J</em><sub>SC</sub>, <em>V</em><sub>OC</sub> and FF.</p> T.V.B. Nagaveni, K.M. Mahadevan, Ravikumar Naik, T.O. Shrungesh Kumara Copyright (c) 2020 ScienceIn Publishing Thu, 25 Jun 2020 00:00:00 +0000