Nano trends (vol16, issue2) by STM Journals Publication

Vol.16, Issue 2 (May-August 2014)

eISSN 0973-418X

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Dr. Baldev Raj Chairman, National Institute of Technology Puducherry, India. Former Director, Indira Gandhi Centre for Atomic Research, India.

Dr. Amarnath Maitra Professor INSA Senior Scientist Centre for Biotechnology Vishwa Bharati Santiniketan, West Bengal, India

Dr. (Ms) Bimlesh Lochab Assistant Prof. University of Delhi, Delhi, India Project Investigator Industrial Tribology Machine Dynamics & Maintenance Engineering Centre (ITMMEC) Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India Prof. C. K. Das Head Materials Science Centre Indian Institute of Technology Kharagpur Kharagpur, India

Dr. Anantha Naik Nagappa Professor Pharma Management Dept. MCOPS, Manipal University, Manipal, India

Dr. Debajyoti Sarangi Senior Research Scientist Silicon PV Cluster PV Production Technologies Solar Energy Research Institute of Singapore (SERIS) National University of Singapore (NUS), Singapore

Dr. Arthur Sherman Expert Intellectual Property Consulting Menlo Park, USA

Dr. B. M. Jaffar Ali Scientist AU-KBC Research Centre M.I.T. Campus, Anna Univeristy Chennai, India

Dr. B.S. Murthy Professor Department of Metallurgical and Materials Engineering, IIT Madras Chennai, India

Dr. B. L. Ramakrishna Professor School of Materials Arizona State University Tempe, AZ 85287-8706, USA

Dr. Gargi Raina Associate Professor Nanotechnology Laboratory (Area Group Leader) School of Electrical Sciences, Vellore Institute of Technology Vellore, India Mr. Gopalakrishnan Chandrasekaran Head, Nanoscale Physicist Nanotechnology Research Center SRM University, SRM Nagar, Kattangulathur, Tamil Nadu, India Dr. J. S. Yadav Director Indian Institute of Chemical Technology [IICT] Hyderabad, India

Vol. 16, No. 2 ( May - August) 2014

Editorial Board Dr. Kai Shen Research Associate Department of Biochemistry and Biophysics School of Medicine, University of North Carolina Chapel Hill, USA

Dr. Rakesh Kumar PDF Material Science and Manufacturing Unit (MSM), CSIR Port Elizabeth, South Africa

Prof. Krishan Lal FNA President, CODATA INSA Senior Scientist, New Delhi, India

Dr. R. Murugavel Faculty, Management and Research Trainer, Research Supervisor, Anna University, Pondicherry University Others: Institutional Advisor & Professor, King Institutions, Namakkal, Tamil Nadu, India.

Prof. Nitish Thakor Professor Biomedical Engineering, Johns Hopkins, University, School of Medicine, Baltimore, USA

Dr. Sundara Ramaprabhu Professor in Physics Head of Alternative Energy and Nanotechnology Laboratory (AENL) Nano-Functional Materials Technology Centre (NFMTC) Department of Physics, IITM, Chennai, India

Dr. Peng Liu Professor Institute of Polymer Science and Engineering College of Chemistry and Chemical Engineering Lanzhou University

Dr. S. Sivaram CSIR Bhatnagar Fellow National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India

Mr. Raj K. Gupta Managing Partner Volant Technologies (A Nano Consulting Company) San Francisco, USA

Prof. Sam Adeloju Head of School, Chair in Analytical & Environmental Chemistry School of Applied Sciences & Engineering Gippsland, Australia

Dr. Rajiv Prakash Professor School of Materials Science and Technology Institute of Technology, Banaras Hindu University, Varanasi, India

Dr. Samit K. Ray Professor Department of Physics & Meteorology, Indian Institute of Technology Kharagpur, India

Vol. 16, No. 2 ( May - August) 2014

Editorial Board Dr. Santanu Bhattacharya Professor Department of Organic Chemistry, Indian Institute of Science Bangalore, India

Dr. V. K. Kothari Professor and Head Department of Textile Technology, Indian Institute of Technology

Prof. Steven S. Smith Professor of Molecular Science City of Hope National Medical Center and Beckman Research Institute, Duarte, USA

Dr. Velumani Subramaniam Coordinador de Relaciones Internacionalesy Profesor Investigador en Ingenieria Electrica, Centro de Investigación y de Estudios Avanzados del I.P.N.(CINVESTAV), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, 07360, México D.F. Delhi, India

Prof. Suash Deb Professor Dept. of Computer Science C.V.Raman College of Engineering Bhubaneswar, INDIA

Prof. Victor M. Castaño Professor and Director Centre Centro de Física Aplicaday Tecnología Avanzada Universidad Nacional Autónoma de México Querétaro, Mexico

Dr. Sushil Kumar Kansal Associate Professor University Institute of Chemical, Engineering & Technology, Panjab University, Chandigarh, India

Prof. Vinod Kumar Suri Professor (Soil Science)-cum-Associate Director (Research) Department of Soil Science, CSK H.P. Agril. University Palampur (HP) Palampur, India

Prof. Tahir Cagin Professor of Chemical Engineering, Materials Science and Engineering, Department of Chemical Engineering, Texas A&M University

Vol. 16, No. 2 ( May - August) 2014

NanoTrends 1. 2.

3. 4.

Contents

Vol.16, No. 2

Direct ELISA-based Reagentless Amperometric Immunosensor for Cancer Antigen 125 Ragini Raghav, Sudha Srivastava

Preparation and Characterization of SiO2 Doped Nanocomposite Polymer Electrolyte Films S. U. Patil, S. S. Yawale, S. P. Yawale

Effect of Layered Double Hydroxide in Polymer Nanocomposites: The Review Pon Maheskumar, P. Sathish Kumar, P. Sathiamurthi, R. Rajasekar

Study of Low Temperature Effect on Strength of Polymers: Novel Approach towards Cryogenic Treatment Kavita N Pande, Anupama Kumar, Dilip R Peshwe Photocatalytic Disinfection using Titanium Dioxide: Use of CFL as Environmental Disinfectant Priyanshu Verma, Anurag Srivastava, Naveen Mittal, Jatinder Kumar

30 39

Nano Trends: A Journal of Nanotechnology and Its Applications Volume 16, Issue 2, ISSN: 0973-418X

Direct ELISA-based Reagentless Amperometric Immunosensor for Cancer Antigen 125 Ragini Raghav, Sudha Srivastava* Department of Biotechnology, Jaypee Institute of Information Technology, Noida, Uttar Pradesh-201307, India Abstract The authors propose a direct electrochemistry-based reagentless, separation-free, immunosensor for quantification of cancer antigen 125 (CA125) based on direct ELISA technique. HRP-conjugated monoclonal anti-CA125 antibody, helps in direct electron transfer from electroctalytic center of enzyme to electrode on immunocomplex formation via covalent linkage between immobilized tagged antibodies, amino acid coated colloidal gold nanoparticles and electrode. Optimum temperature, pH and incubation time for efficient electron transfer and hence amperometric response of the immunosensor was 30 C, pH 7.0 and 15 min respectively. The electrocatalytic current response was proportional to CA125 concentration with a dynamic range of 1.0 to 9 kIU/mL, lower limit of detection as 1 IU/mL and linear range 1.0–1500 IU/mL with sensitivity of 29.7 nA/IU/cm2. The fabricated immunosensor showed good stability and could be used for onsite clinical diagnosis of CA125 since it requires no processing steps.

Keywords: Immunosensor, electrochemistry

biomarker,

ovarian

carcinoma,

CA125,

direct

Nano Trends: A Journal of Nanotechnology and Its Applications Volume 16, Issue 2, ISSN: 0973-418X

Preparation and Characterization of SiO2 Doped Nanocomposite Polymer Electrolyte Films S. U. Patil1*, S. S. Yawale2, S. P. Yawale3 1

Govt. College of Engineering, Chandrapur-442403, India Pre Indian Administrative Services Training Institute, Nagpur-440001, India 3 Govt. Vidharbha Institute of Science and Humanities, Amravati-444604, India 2

Abstract The PEO-LiClO4-SiO2 nanocomposite solid polymer electrolytes with different optimized high conducting concentrations of SiO2 nanoparticles are prepared by solution casting method and studied. Conductivity measurements were carried out by AC impedance spectroscopy and discussed. Transference number measurement showed ionic conduction through electrolyte samples. Thermal gravimetric analysis and differential thermal analysis were employed to analyze the thermal stability of the nanocomposite polymer electrolytes in the range 300 to 800 K. FTIR spectroscopy was used to identify the nature of bonding and different functional groups present in the electrolyte by monitoring vibration energy levels of molecules in the material. FTIR spectra showed the complexation of LiClO4 with PEO. The SEM photograph, used to study surface morphology, confirmed the amorphous nature of nanocomposite electrolyte.

Keywords: Nanocomposite polymer electrolyte, ceramic filler, poly (ethylene oxide), FTIR spectroscopy, ionic conductivity, impedance spectroscopy, thermal stability

Nano Trends: A Journal of Nanotechnology and Its Applications Volume 16, Issue 2, ISSN: 0973-418X

Effect of Layered Double Hydroxide in Polymer Nanocomposites: The Review Pon Maheskumar, P. Sathish Kumar, P. Sathiamurthi, R. Rajasekar* Department of Mechanical Engineering, School of Building and Mechanical Sciences, Kongu Engineering College, Tamilnadu-638052, India Abstract Layered double hydroxides (LDH) are mineral and synthetic materials with positively charged brucite-type layers of mixed metal hydroxides. Inorganic nanoscale fillers are considered to be very important to include layered silicates, nanotubes, metal oxides, nanoparticles of metals, semiconductors, carbon black, etc. Due to this reason, nanocomposites have been developed using LDH for several applications. Main emphasis has been accorded to the preparation and characterization of LDH nanocomposites utilizing various industrial polymers for wide applications in fire safety materials, sensors, bio-medical, packing, electrical cables, etc. In this review, the morphological characterization exploring the interaction and extent of dispersion of LDH in the polymer matrices are extensively accounted. From the reports, it clearly proves the exfoliation and strong interaction of LDH extremely enhanced the physical, mechanical, thermal, biocompatibility and tribological properties of the added polymer. LDHs have been shown to have remarkable shape-selective intercalation properties.

Keywords: Layered double hydroxide polymer nanocomposites, thermal stability *Author for Correspondence E-mail: rajasekar.cr@gmail.com

Nano Trends: A Journal of Nanotechnology and Its Applications Volume 16, Issue 2, ISSN: 0973-418X

Study of Low Temperature Effect on Strength of Polymers: Novel Approach towards Cryogenic Treatment Kavita N Pande*, Anupama Kumar, Dilip R Peshwe Visvesvaraya National Institute of Technology (VNIT), South Ambazari Road, Nagpur-440010, Maharashtra, India Abstract The low-temperature treatment is a well-established and proven technique for metals and steels which enhances their wear performance along with strength of material, but it is an emerging tool for polymers. Thus, it is mandatory to examine the polymer response when they are subjected to low temperature. Hence, this paper investigates the effect of low temperature on the selected virgin polymers (PA, PTFE, PC, PS, and PU and PBT). The polymers were directly immersed into liquid nitrogen for definite time duration as 1 h, 24 h and 1-week in a cryo-container filled with liquid nitrogen and then tested for their structural, thermal and mechanical properties at ambient temperature using respective characterization techniques. The XRD and FTIR results revealed the definite change in the chemistry of the polymers on treatment. The DSC results confirm the fact that the structural modifications are taking place without sacrificing thermal stability. The effect on the strength and wear performance is also noted.

Keywords: Polymers, liquid nitrogen, wear, thermal ageing, cryogenic treatment.

Nano Trends: A Journal of Nanotechnology and Its Applications Volume 16, Issue 2, ISSN: 0973-418X

Photocatalytic Disinfection using Titanium Dioxide: Use of CFL as Environmental Disinfectant Priyanshu Verma*, Anurag Srivastava, Naveen Mittal, Jatinder Kumar Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

Abstract Bactericidal activity of fluorescent lamp coated with TiO2 nanoparticles in aqueous bacterial culture using same fluorescent lamp’s visible light was studied. Here, TiO2 nanoparticles act as a photocatalyst, which absorb visible light and produce free radicals for oxidation of pollutants. Dip-coating method was used for coating of thin layer of TiO2 nanoparticles. The experiment was performed in a specifically designed batch photocatalytic reactor in lab using lab-grade glassware. Gram-negative bacteria Escherichia coli MTCC-443 strain was used to evaluate the bactericidal action of TiO2 coated fluorescent lamp. CFUs were calculated through microbiological assay to interpret the killing of bacteria during fluorescent lamp photocatalysis. The samples were taken after each hour of fluorescent light irradiation. The results showed that no significant degradation occurred by 1–2 h fluorescent light irradiation but after 3 h it gave significant difference from previous CFUs. The time for significant removal or killing of bacteria can be minimized by increasing the dilutions and intensity of fluorescent light irradiation. Fluorescent lamp photocatalysis is effective as disinfection as well as a lamp.

Keywords: Fluorescent lamp, photocatalysis, TiO2