Journal of Nanoscience,
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May - August 2014
(JoNSNEA)ISSN: 2321-5194
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Journal of NanoScience, NanoEngineering & Applications
(ISSN: 2321–5194)
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I take the privilege to present the hard copy compilation for the [Volume 4 Issue (2)] of Journal of
NanoScience, NanoEngineering & Applications (JoNSNEA). The intension of JoNSNEA is to
create an atmosphere that stimulates creativeness, research and growth in the area of NanoScience ,
NanoEngineering & Applications.
The development and growth of the mankind is the consequence of brilliant Research done by
eminent Scientists and Engineers in every field. JoNSNEA provides an outlet for Research findings
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The aim and scope of the Journal is to provide an academic medium and an important reference for
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STM JOURNALS
1. Series Resistor Method for Higher Signal-to-Noise Ratio and High Sensitivity in Superconducting Nanowire Single-Photon Detectors Venkata Naga Vamsi Annepu, Bhujanga Rao Annepu 1
2. Photo-Assisted Room Temperature Synthesis of Brightly Fluoresce ZnSe Quantum Dots in
Aqueous Medium Girish Mohanta, Navraj Singh Brar, Rupesh Kumar, A. K. Paul, Akash Deep 5
3. Simple Hydrothermal Synthesis and Morphological Study of Magnetic NanoparticlesMd. Shariful Islam, Alam Khan, G.M. Shafiur Rahman, Hrithita Aftab, Yoshifumi Kusumoto 14
4. Synthesis by Sol–Gel Method and Characterization of CaAlO: Mn, Dy NanoparticlesM. Freeda, G. Suresh 23
5. Storage Modulus and Glass Transition Temperature of MWNT/PMMA Polymer Nanocomposite Films with Different wt% of MWNTM. Verma, D. Patidar, M. Baboo, K. B. Sharma, N.S. Saxena 28
ContentsJournal of NanoScience, NanoEngineering & Applications
JoNSNEA (2014)© STM Journals 2014. All Rights Reserved
Journal of NanoScience, NanoEngineering & Applications ISSN: 2231-1777 (online), ISSN: 2321-5194 (print)
Volume 4, Issue 2
www.stmjournals.com
Series Resistor Method for Higher Signal-to-Noise Ratio
and High Sensitivity in Superconducting Nanowire
Single-Photon Detectors
Venkata Naga Vamsi Annepu1*, Bhujanga Rao Annepu
2
1Gitam Institute of Technology, Gitam University, Rushikonda, Visakhapatnam, India
2College of Engineering, Andhra University, Visakhapatnam, India
Abstract A series resistor method has been presented for higher signal-to-noise and high
sensitivity in superconducting nanowire single-photon detectors (SNSPD). This method
has given a very high useful data yields exceeding 50% while still maintaining pure single-photon operation and wide dynamic range. The SNSPD signal is roughly
proportional to the nanowire width, so narrow nanowire have poor signal-to-noise ratio (SNR) at widths from 4–30 nm and fabrication at these length scales is extremely
challenging. In this paper, the authors have addressed the SNR issues and demonstrated
that the higher SNR and high sensitivity can be achieved at 30-nm-nanowire superconducting single-photon detector for different IB values.
Keywords: Single photon, Signal to noise ratio, Sensitivity, Detection efficiency,
Dark count rate, Superconducting nanowire
JoNSNEA (2014)© STM Journals 2014. All Rights Reserved
Journal of NanoScience, NanoEngineering & Applications ISSN: 2231-1777 (online), ISSN: 2321-5194 (print)
Volume 4, Issue 2
www.stmjournals.com
Photo-Assisted Room Temperature Synthesis of Brightly
Fluoresce ZnSe Quantum Dots in Aqueous Medium
Girish Mohanta1,2*, Navraj Singh Brar
3, Rupesh Kumar
3, A. K. Paul
1,2, Akash Deep
1,2
1Academy of Scientific and Innovative Research, CSIR-CSIO, Chandigarh, India
2Central Scientific Instruments Organisation (CSIR-CSIO), Chandigarh, India
3DAV Institute of Engineering & Technology, Jalandhar, Punjab, India
Abstract The ZnSe quantum dots (QDs) have gained considerable research interest as an
alternative to heavy-metal-based QDs and are non-toxic, have strong emission in UV-
blue region, and with wider band gap are suitable for doping various ions to tune their optical and electronics properties. For biological applications, aqueous stability of QDs
is an indispensable prerequisite. Mercapto-carboxylic acids such as mercaptopropionic acids (MPA), thioglycolic acids (TGA), etc., are commonly used for providing aqueous
stability to the QDs. They also provide surface functional groups suitable for
bioconjugation as well as restrict size of QDs during synthesis. Photo-assisted synthesis of ZnSe QDs has been studied previously but requires refluxing of QDs at relatively high
temperatures for longer durations. Here, the authors report a photo-assisted synthesis of
ZnSe QDs capped with either MPA or TGA at room temperature in aqueous medium. The as-synthesized QDs were probed for their structural, optical and chemical properties
through various characterization techniques. The synthesized QDs were ca 2–3 nm in diameter; surface functionalized with carboxylic group and showed bright fluorescence in
UV-blue region.
Keywords: ZnSe quantum dots, Fluorescence, Aqueous medium, Nanocrystals
JoNSNEA (2014)© STM Journals 2014. All Rights Reserved
Journal of NanoScience, NanoEngineering & Applications ISSN: 2231-1777 (online), ISSN: 2321-5194 (print)
Volume 4, Issue 2
www.stmjournals.com
Simple Hydrothermal Synthesis and Morphological Study
of Magnetic Nanoparticles
Md. Shariful Islam1*, Alam Khan
2, G.M. Shafiur Rahman
3, Hrithita Aftab
3,
Yoshifumi Kusumoto4
1Department of Animal Husbandry and Veterinary Science, Faculty of Agriculture, Rajshahi
University, Rajshahi, Bangladesh 2Department of Pharmacy, Rajshahi
University, Rajshahi, Bangladesh
3Department of Material Science and Engineering, Rajshahi
University, Rajshahi, Bangladesh
4International University of Kagoshima, Seiryo, Kagoshima, Japan
Abstract Magnetite (Fe3O4) nanoparticles were synthesized using FeCl3•6H2O or FeCl2•4H2O with
5 or 8 mmol concentration and 3 or 5 h incubation time with the constant pH (7.5) by simple hydrothermal decomposition and then transferred them into maghemite (γ-Fe2O3)
and hematite (α-Fe2O3). Precisely, the objectives of the study were to evaluate the
influences of salt type, its concentration and incubation time on the morphology of the as-synthesized magnetic nanoparticles. Synthesized nanoparticles were characterized by
means of XRD, FE-SEM, TEM, UV-Vis absorption (reflectance) spectra and magnetic hysteresis loops by superconducting quantum interference device (SQUID), without any
size sorting. In case of iron hexahydrate (FeCl3•6H2O), 5 mmol salt concentration along
with 5 h incubation period results in homogeneous spherical-shaped particles. On the other hand, the same salt but 8 mmol concentration and 3 h incubation period produced
heterogeneous spherical-shaped particles with bigger particle sizes. In case of iron tetrahydrate (FeCl2•4H2O) almost neck-structured heterogeneous particles were obtained
by using both types of salt concentrations and incubation period (5 or 8 mmol and 5 or 3
h). Finally, our study revealed that in both type of salts, increased concentration and decreased incubation period result in increased particles size.
Keywords: Magnetic materials, Spherical-shaped, Neck-structured, Hysteresis loops,
Salt, Hyperthermia
JoNSNEA (2014)© STM Journals 2014. All Rights Reserved
Journal of NanoScience, NanoEngineering & Applications ISSN: 2231-1777 (online), ISSN: 2321-5194 (print)
Volume 4, Issue 2
www.stmjournals.com
Synthesis by Sol–Gel Method and Characterization of
CaAlO: Mn, Dy Nanoparticles
M. Freeda1*, G. Suresh
2
1Department of Physics, Ponjesly College of Engineering, Nagercoil, Tamil Nadu, India
2Department of Engineering Physics, FEAT, Annamalai University, Chidambaram, Tamil Nadu, India
Abstract Dy and Mn doped Calcium Aluminate nanoparticles were synthesized by using Sol-gel method. Heat treated material was characterized by X-ray diffraction(XRD), optical study
of photoluminescence (PL) emission spectra, morphological study of scanning electron
microscopy (SEM) combined with X-ray analysis. The Dy and Mn doped phosphor exhibits emission at the excitation of the material with 380 nm wavelength generates a
strong emission at 480 nm. Besides this, subsidiary maxima at 417, 422 nm wavelength in
violet region and 620 nm in red region.
Keywords: Dysporsium, XRD, SEM, Sol-gel method
JoNSNEA (2014)© STM Journals 2014. All Rights Reserved
Journal of NanoScience, NanoEngineering & Applications ISSN: 2231-1777 (online), ISSN: 2321-5194 (print)
Volume 4, Issue 2
www.stmjournals.com
Storage Modulus and Glass Transition Temperature of
MWNT/PMMA Polymer Nanocomposite Films with
Different wt% of MWNT
M. Verma*, D. Patidar, M. Baboo, K. B. Sharma, N.S. Saxena Semiconductor and Polymer Science Laboratory, Department of Physics,
University of Rajasthan, Jaipur 302004, India
Abstract This paper presents the study of behavior of storage modulus and glass transition
temperature of MWNT/PMMA polymer nanocomposites prepared by solution casting
method, with different (0, 0.1, 0.2, 0.3, 0.5, 1, 5, 10) wt% of MWNT in the PMMA matrix. Dynamic mechanical analysis has been done in tension mode. Storage modulus increases
with CNT loading in matrix except for 0.1, 0.2 wt% CNT samples, for 0.5 wt% sample onwards to 10 wt% increases continuously, whereas glass transition temperature is found
to increase smoothly for all samples, which is explained in terms of the interactions
between polymer-MWNT and MWNT-MWNT.
Keywords: Nanocomposites, Storage modulus, Glass transition temperature,
Dynamic mechanical analyzer