1. Nano Science And Engineering By Ionizing Radiations

D. K. Avasthi; S. K. Sarkar; A. Tripathi; T. Mukherjee

Volume 4, Issue 6 , June 2013, Pages 385-389

  The properties of materials at the nano scale critically depend on their size and shape, thus opening a new exciting area of nanotechnology. Its main thrust is to create novel functional materials with their unique physical, chemical and biological properties. The field of engineering of materials with ...  Read More

2. Stabilization Of FeCo Alloy Phase In FeCo-SiO2 nanocomposites

Hardeep Kumar; L. Olivi;G. Aquilanti; S. Ghosh; P. Srivastava; D. Kabiraj; D. K. Avasthi

Volume 4, Issue 6 , June 2013, Pages 390-397

  A series of FeCo-SiO2 granular films of different FeCo atomic concentration (33-54%) have been prepared by fast atom beam sputtering technique and post-annealed in inert (Ar) and reducing (H2) gas environments. Fe and Co K-edge XANES analysis of as-deposited films indicate that both Fe and Co are present ...  Read More

3. Azimuthal Angle Dependence Of Nanoripple Formation On Si(100) By Low Energy Ion Erosion

Sarathlal K.V; ;Ajay Gupta; Satish Potdar; Mohan Gangrade; V. Ganesan; and Ajay Gupta

Volume 4, Issue 6 , June 2013, Pages 398-401

  Generation of self organized nanoripple patterns on Si (100) single crystal surface using low energy Ar ion beam erosion has been studied. Ion energy and ion fluence dependence of the ripple pattern is in general agreement with the reported works. However, it is found that at relatively low fluences, ...  Read More

4. Low Energy Bombardment Induced Formation Of Ge Nanoparticles

Indra Sulania; Mushahid Husain;D. K. Avasthi; Dinesh Agarwal; Manish Kumar

Volume 4, Issue 6 , June 2013, Pages 402-407

  We present the formation of Ge nanostructures by bombardment of 1.5 keV Ar atoms on Ge (100). The bombardment was carried out at normal incidence with variation in the fluences from 5x10 15 to 3x10 17 atoms/cm 2 . Near surface chemical study on the pristine and irradiated Ge samples has been carried ...  Read More

5. Synthesis Of Ag Nanoparticles On Polymer Surface: 150 KeV Ar Ion Irradiation Of Ag-PVC Bilayer

Jai Prakash; A. Tripathi; G. B. V. S. Lakshmi; V. Rigato; Jalaj Tripathi; D. K. Avasthi

Volume 4, Issue 6 , June 2013, Pages 408-412

  Thin metal films of Ag (~10 nm) deposited on spin coated PVC film on quartz substrate, were irradiated with 150 keV Ar ions at fluences varying from 5×10 15 to 5×10 16 ions/cm 2 and characterized with Rutherford backscattering spectrometry (RBS), atomic force microscopy (AFM), scanning electron ...  Read More

6. Synthesis Of Carbon Nanowires By SHI Irradiation Of Fullerene C70 thin Film 

R. Singhal; A. Tripathi; D. K. Avasthi

Volume 4, Issue 6 , June 2013, Pages 413-417

  Electrically conducting carbon nanowires, all parallel to each other and embedded in fullerene C70 matrix are created by swift heavy ion irradiation of thin fullerene C70 film at low fluences (up to 10 10 ions/cm 2 ). The conductivity of the wires is several orders of magnitude higher than the surrounding ...  Read More

7. Stimuli-responsive Membranes Through Graft-copolymerization Of Acrylic Acid (AAc) Onto Polycarbonate Track Etched (PCTE) Membrane

Sunita Rattan; Teena Sehgal

Volume 4, Issue 6 , June 2013, Pages 418-422

  Radiation grafting of the Track Etched Membranes (TEMs) is a versatile tool for the formation of stimulus responsive membranes which change their permeation properties in response to environmental stimuli such as pH or temperature. Stimuli-responsive polymeric membranes have attracted the attention of ...  Read More

8. Effect Of Swift Heavy Ion On Structural And Optical Properties Of Undoped And Doped Nanocrystalline Zinc Oxide Films

Vinod Kumar; L. P. Purohit;Fouran Singh; R. G. Singh

Volume 4, Issue 6 , June 2013, Pages 423-427

  Swift heavy ion (SHI) induced modification in structural and optical properties of undoped and doped nanocrystalline (nc) ZnO films deposited by sol-gel method are investigated. These nanocrystalline films were irradiated by MeV ions of Au, Ag and Ni at various ion fluences. The structural properties ...  Read More

9. Modification Of Nanocrystalline RF Sputtered Tin Oxide Thin Film Using SHI Irradiation

Vijay Kumara; Anshul Jaina; Deepti Pratapa; D.C. Agarwalb; I. Sulaniab; V. V. Siva Kumarb; A. Tripathib; S. Varmac; R.S. Chauhan

Volume 4, Issue 6 , June 2013, Pages 428-432

  Nano crystalline tin oxide thin films were deposited on Si and quartz substrates using R. F. magnetron sputtering technique. A set of films was annealed in oxygen environment. These as-deposited and annealed films were irradiated using 100 MeV Ag ions at different fluences ranging from 3×10 11 ...  Read More

10. Swift Heavy Ion Irradiation Induced Structural, Optical And Conformational Modifications In Conducting Polymer Nanostructures

A. Kumar;Somik Banerjee

Volume 4, Issue 6 , June 2013, Pages 433-437

  Structural and conformational modifications in conducting polymer nanostructures viz., Polyaniline (PAni) nanofibers induced by swift heavy ion (SHI) irradiation have been investigated employing TEM, XRD, UV-Vis, FTIR and micro-Raman spectroscopy. Upon interaction with the highly energetic ions, PAni ...  Read More

11. Effect Of Irradiation Of Si5+­ ion On Fe Doped Hydroxyapatite

V. Sarath Chandra; K. Elayaraja; R. V. Suganthi; M. I. Ahymah Joshy; I. Sulania; P.K. Kulriya; K. Asokan; D. Kanjilal; S. Narayana Kalkura

Volume 4, Issue 6 , June 2013, Pages 438-443

  Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is the main inorganic component of hard tissues like bone and teeth. HAp incorporated with magnetic ions, play an important role in cell separation, magnetic resonance imaging (MRI), targeted drug delivery and in hyperthermia treatment of cancer. In this study, the ...  Read More

12. In-situ TEM Observation Of Electron Irradiation Induced Shape Transition Of Elongated Gold Nanoparticles Embedded In Silica

S. Mohapatra; J. Ghatak;D.K. Avasthi; Y.K. Mishra

Volume 4, Issue 6 , June 2013, Pages 444-448

  Elongated Au nanoparticles (NPs) embedded in silica matrix were fabricated by 100 MeV Ag ion irradiation of 3 MeV Au ion implanted SiO2/Si(100) substrates, annealed at 1050 o C. Electron-beam-induced shape evolution of elongated Au NPs embedded in SiO2 has been studied by high resolution transmission ...  Read More

13. Shape Evolution Of CdSe Nanomaterials In Microheterogenous Media

Shalini Singh; S. Adhikari;S. K. Sarkar; Apurav Guleria; M. C. Rath; A. K. Singh

Volume 4, Issue 6 , June 2013, Pages 449-453

  Cadmium selenide, CdSe nanomaterials were synthesized in microhetergenous media consisting of water-in-oil type microemulsions using the surfactant, cetyl trimethyl ammonium bromide (CTAB) and cyclohexane as the oil, under two different experimental conditions. In one set of experiments, the synthesis ...  Read More

14. Effect Of Electron Beam Irradiation On Photoluminescence Properties Of Thioglycolic Acid (TGA) Capped CdTe Nanoparticles

Chethan Pai S; L. M. Kukreja;Ganesh Sanjeev; M. P. Joshi; S Raj Mohan; T. S. Dhami; Jayakrishna Khatei; K S Koteshwar Rao

Volume 4, Issue 6 , June 2013, Pages 454-457

  Irradiation effects of 8 MeV electrons on photoluminescence properties of thioglycolic acid (TGA) capped CdTe quantum Dots (QD) are presented. Steady-state and time-resolved photoluminescence (PL) spectroscopy were used for anlayzing PL properties of both irradiated and unirradiated quantum dots. The ...  Read More

15. A Comparative Study Of Gamma, Electron Beam, And Synchrotron X-ray Irradiation Method For Synthesis Of Silver Nanoparticles In PVP 

Nilanjal Misra; Jayashree Biswal; V. P. Dhamgaye; G. S. Lodha; S. Sabharwal

Volume 4, Issue 6 , June 2013, Pages 458-463

  A one-pot synthesis method has been developed for preparation of silver nanoparticles in aqueous poly (vinyl pyrrolidone) (PVP) solution by synchrotron X-ray radiation. The hydrated electrons (eaq - ) and hydrogen atom radical (H·), products of radiolysis of water molecules by synchrotron X-rays ...  Read More

16. Sensor Grade Nanostructured Thin Films Of Multicomponent Semiconducting Oxide Materials By Pulsed Laser Deposition

K. I. Gnanasekar; V. Jayaraman;T. Gnanasekaran; E. Prabhu

Volume 4, Issue 6 , June 2013, Pages 464-475

  High quality sensor grade nanostructured thin films of multicomponent semiconducting oxide sensors with superior sensitivity for monitoring trace levels of pollutant gases like NOx, NH3, H2 etc., in the ambient have been deposited by pulsed laser deposition technique. In-situ growth carried out at relatively ...  Read More

17. Microstructural Investigation Of Lipid Solubilized Microemulsions Using Laser Light Scattering

Suman Rana; Gunjan Verma;P. A. Hassan

Volume 4, Issue 6 , June 2013, Pages 476-481

  Solubilization of solid lipids in oil-in-water microemulsion is an important step in the preparation of lipid nanoparticles. Oil in water microemulsion has been prepared using Tween-80 (T-80) as a surfactant and isopropyl myristate (IPM) as an oil phase with a view to utilize them for the preparation ...  Read More

18. Synthesis, Characterization And Nonlinear Optical Properties Of Laser-induced Au Colloidal Nanoparticles

R. Kuladeep; L. Jyothi;D. Narayana Rao; K. Shadak Alee

Volume 4, Issue 6 , June 2013, Pages 482-487

  Gold (Au) colloidal nanoparticles (NPs) have been synthesized by direct irradiation of gold precursor (HAuCl4) solution in polyvinyl alcohol (PVA) matrix using nanosecond laser pulses at different irradiation fluencies and exposure times. Appearance of wine and dark wine colors indicated the formation ...  Read More

19. Nano Slit And Dot Array Pattern Of Au On SiO2 substrates Using Laser Beam Lithography

Pratap. K. Sahoo

Volume 4, Issue 6 , June 2013, Pages 488-491

  Highly monochromatic coherent light intensity of lasers provides the possibility of fabricating periodic nano-patterns which are needed in many applications. Here, we report 2D grating structure and periodic nano hole and dot arrays fabricated using two laser beam interference lithography. Using this ...  Read More

20. Self-assembled Microcones Generated On Solid Surface Through Pulsed Laser Irradiation

Sucharita Sinha; Anil K.Singh

Volume 4, Issue 6 , June 2013, Pages 492-496

  We present here our results on surface micro-structuring via nanosecond pulsed laser irradiation of Titanium and Stainless Steel cathode samples. Laser based surface micro-structuring leading to formation of self-assembled micro-tips can potentially enhance field emission efficiency of such surface treated ...  Read More

21. Inhibition And Enhancement Of Spontaneous Emission Using Photonic Band Gap Structures 

Rajesh V. Nair; ;B N Jagatap; Anjani K. Tiwari; Sushil Mujumdar; and B N Jagatap

Volume 4, Issue 6 , June 2013, Pages 497-501

  We discuss experimental results demonstrating the inhibition and enhancement of spontaneous emission of dye molecules embedded in a nanophotonic structure. This is achieved in our all-solid self-assembled photonic crystals consisting of dye-doped polystyrene spheres. Our samples exhibit well-resolved ...  Read More

22. Surface-enhanced Raman Scattering (SERS) Spectroscopy For Trace Level Detection Of Chlorogenic Acid

Nandita Maiti; ;Tulsi Mukherjee; Sudhir Kapoor; and Tulsi Mukherjee

Volume 4, Issue 6 , June 2013, Pages 502-506

  Surface-enhanced Raman scattering (SERS) spectroscopy is one of the most sensitive tools for the detection of molecules adsorbed on nanometer-sized roughened metal surfaces. Additionally, SERS combines high sensitivity with the observation of vibrational spectra of the adsorbate, giving complete information ...  Read More