JNSQP Volume & Issue

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DFT studies on Vibrational, NLO, Thermal and Energy Gap studiesof 4-(3-clorophenyl)-2-phenyl- 1,3-thiazole(Cl-PPT)

Journal of Nano Science and Quantum Physics , Available online 15th June 2017

V. Vasantha Kumar | J. Laxmikanth Rao


DFT studies have been carried out on CL-PPT using DFT-B3LYP/6-311+Glevel of the theory. The structural parameters of the title molecule, like bond length, bond angle and dihedral angles have been calculated and compared with available experimental data. The FTIR wavenumbers are calculated using above mentioned method and compared with the experimental IR wave numbers. Nonlinear optical properties and thermal properties have been calculated using the same methodology. The frontier molecular orbital studies have been carried out to explain the charge transfer in title molecule.From this analysis, it can be seen that the vibrational frequencies obtained from B3LYP method are in good agreement with the experiment.

Enhanced Design of Automated Solar Still Based on Light-Harvesting Nanoparticles

Journal of Nano Science and Quantum Physics , Available online 14th June 2017

J Aishwarya | S Shiva Ranchani


In the current scenario majority of the cities and towns in India are without proper planning for water need versus water availability. The per capita water availability has drastically reduced over the past. Among a range of solutions, water distillation process is optimal to produce potable water without affecting its palatability. In arid remote areas solar distillation offers a promising alternative for saline water resources as it can partially support fresh water need with free energy, simple technology and a clean environment. The aim of this project is to design a solar still for water distillation that can purify water from nearly any source. The system is compact, quick and easy-to-handle and depends only on renewable solar energy for its operation. The low daily productivity of the solar still is the main drawback in the existing system. This project provides an optimized system for monitoring and distillation of saline water using solar still with improved productivity and thermal efficiency thereby significantly reducing the production cost. This process combines the emerging technology of nano-photonics with solar energy which makes it completely off-grid. This stand-alone system is monitored and controlled using a microcontroller. Water is converted into steam, directly and immediately, even before the boiling point. It uses the highly localized & strong photo-thermal response of the nano particles dispersed in the water. In this way the design features of the existing solar still is improved in many ways to make it relatively cheap, portable and automated.Thus an optimized solar still is designed with enhanced productivity providing an eco-friendly solution.

Exploration of Antifungal Activity of CuO Nanoparticles Synthesized by Hydro- thermal Precipitation Method

Journal of Nano Science and Quantum Physics , Available online 14th June 2017

Jayant Pawar | Rabinder Henry, Prakash, Amit Patwardhan, Bhushan Patil


Present study focuses on antifungal properties of copper oxide nanoparticles (CuO NPs) synthesized by hydro-thermal route. Copper (II) acetate was used as a precursor got reduced into stable CuO nanoparticles by controlled addition of reducing agent sodium hydroxide and capping agent Sodium Lauryl Sulphate (SLS). Characterization of CuO powder was carried out by using UV-Visible Spectroscopy and Scanning Tunneling Microscopy (STM). The absorption spectrum was found to be at 295 nm and its band gap about 2.1eV and STM image showed cluster morphology on surface at 50 nm. CuO NPs showed excellent antifungal activity against two molds Penicillium sp. and Rhizopus sp.Moreover, Penicillium sp.was found to be greater sensitive to CuO NPs compared to Rhizopus sp. However, probable antifungal mechanism of CuO NPs must be further investigated. Therefore, antifungal activity against Penicillium sp. and Rhizopus sp. molds reveals their effective potential in food security

Optical Isolator Design Aspects with Silicon Photonics -A Review

Journal of Nano Science and Quantum Physics , Available online 14th June 2017

Yashodhan Mandke | Rabinder Henry, Dr.Arunagiri Sivasubramanian


The advancement in silicon photonics especially for Photonics Integrated Circuits design has generated a requirement for modelling all optic components accurately and effciently.Optical isolator desing is based on Faraday roation principle. This has posed design challenges with respect to complexity and efficiency.The back reflection of light in photonics device diminishes the performance of the whole system.An effective design of an optical isolator becomes crucial for system design.The electro optic and magneto optic techniques are used to analyze and solve the transverse electric and magnetic fields.The main goal is to have desired isolation.The nonlinear Kerr effect occuring in optical devices is recently adopted so as to achieve optical isolation with the help of mixing of wavelengths. This paper reviews different methods and experiments specifically for designing an optical isolator for silicon photonic devices.

Simulation Study of Messenger Molecule Displacement in Communication via Diffusion

Journal of Nano Science and Quantum Physics , Available online 14th June 2017

Anmol Preet Kaur | Dr. Deep Kamal Kaur Randhawa, Gurleen Kaur Walia


Molecular Communication via diffusion (MCvD) is a new communication paradigm that uses molecules as the information carrier between the nano-machines. The end to end MolecUlar CommunicatIoN (MUCIN) simulator tool is used to explore the characteristics of the MCvD channel. This simulator considered Binary Concentration Shift Keying (BCSK) technique for modulating binary information symbols, support 1-dimensional environment, and send symbols consecutively. The main issues of MCvD system are the Inter-Symbol Interference that arises when the molecules belonging to the previous symbol come into the current symbol. Conventional MCvD system exhibits a long tail of received molecular histogram, results in higher ISI. In this paper, the displacement of a messenger molecule is increased to reduce the amount of stray molecules in the MCvD channel.The proposed technique shows the first hitting time distribution to determine the highest reception of the information carrying molecules by the receiver.We also evaluate the performance of proposed scheme for different values of step length in terms of Inter- Symbol Interference (ISI), symbol detection and communication delay. Our results indicate that introducing proposed technique significantly improves the performance of MCvD system.