Nanostructured Optical Materials and Devices (NOMAD) Group 

Group Leader 

Dr. Dilip Kumar Singh    

Assistant Professor

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 http://scholar.google.com/citations?user=lBE5XwoAAAAJ

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  http://ahshas.blogspot.kr/

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  http://kr.linkedin.com/pub/dilip-kumar-singh/15/6a0/92a                                                             

Division of Advanced Materials and Devices

CSIR-National Physical Laboratory, New Delhi.

Email  :   dilipsinghnano1@gmail.com. dilip@nplindia.org

Phone:   +011-4560-8404 (O),  91-8130610762 (M)

 Research Interests:  Experimental Condensed Matter Physics

     Nano-optics

Optics of H-vector of light, Nano-Photonics, Plasmonics, Nanofabrication technologies, Metamaterials and Near-field Optics.

Light scattering and optical Spectroscopy

Raman and photoluminescence spectroscopy, Coherent-backscattering of light, Photoluminescence Quenching, Scattering from nanostructures.

Nanomaterials growth and properties engineering

Invited Presentations   

 Fellowships / Awards: 

[1]   American Physical Society (Annual)

[2]   Material Research Society of India (MRSI) Life Member

[3]   Indian Carbon Society (Life Member)

[4]   Ion-Beam Society of India (Life Member)

[5]   Plasma Science Society of India (Life Member)

[6]   Electron Microscopy Society of India (Life Member)

[5] DST-Inspire Faculty Award (Physical Science), Department of Science and Technology (DST), Govt. of India (2013).

[4]     BK21 Post-doctoral Fellowship, by Government of Korea, at Seoul National University, Republic of Korea.

[3]      Junior Research Fellowship, MHRD Govt. of India, July 2005- July 2007.

[2]      Senior Research Fellowship, MHRD Govt. of India, July 2007- September 2008, (offered till 2010) .

[1]      Senior Research Fellowship, Council for Scientific and Industrial Research(CSIR), Govt. of India, October 2008- September 2010, 

      Nano-diamonds, Graphene, Carbon Nanotubes, Semiconductor       nanoparticles,  Chemical vapor deposition based growth of 1-D          and 2-D materials, Defect  engineering and Ion-beam  

      modification of Materials, Optical properties of materials and  

      applications.

Publications:  

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 Nano-Optics

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 Graphene Growth

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 Details

 Ravi Kumar, S. J. Yoon, K. G. Lee, Prabir Pal, R. P. Pant, C. K. Suman, S. R. Dhakate, Raj Kumar, Devesh K. Avasthi, Dilip K. Singh*

Purification Method Dependent Fluorescence from Nitrogen-vacancy (NV) Centers of Nano-diamonds.

RSC Advances 6 (52), 47164-47173 (2016). *Corresponding author

 

 

Selective electric and magnetic sensitivity of aperture probes

Dilip K. Singh, JS Ahn, S Koo, T Kang, J Kim, S Lee, N Park, DS Kim

Optics Express 23 (16), 20820-20828 (2015)

The role of substrate purity and its crystallographic orientation in the defect density of chemical vapor deposition grown monolayer graphene

M Borah, Dilip K. Singh, K. M. Subhedar, SR Dhakate

RSC Advances 5 (85), 69110-69118 (2015)

Optical field enhancement of nanometer-sized gaps at near-infrared frequencies.

Jae Sung Ahn, Taehee Kang, Dilip K. Singh, Young-Mi Bahk, Hyunhwa Lee, Soo Bong Choi and Dai-Sik Kim

Optics Express 23, 4897 (2015).

Structural, optical and electronic properties of homoepitaxial GaN nanowalls grown on GaN template by laser molecular beam epitaxy

S. S. Kushvaha · M. Senthil Kumar · A. K. Shukla · B. S. Yadav ·Dilip K. Singh · M. Jewariya · S. R. Ragam · K. K. Maurya ·

RSC Advances 5 (107), 87818-87830 (2015).

Manish Verma, Dilip K. Singh*, P. Senthilkumaran, Joby Joseph, H. C. Kandpal, Ultrasensitive and fast detection of denaturation of milk by Coherent backscattering of light.

Scientific Reports, 4, 7257 (2014).

(*Corresponding)

Prasanta J. Goutam, Dilip K. Singh and Parameswar K. Iyer

Photoluminescence quenching mechanism of poly(3-hexylthiophene) by carbon nanotubes

J. Phy. Chem. C 116, 8196 (2012).

Dilip K. Singh, Parameswar K. Iyer and P. K. Giri 

Distinguishing Defect Induced Intermediate Frequency Modes from Combination Modes in Raman Spectrum of Single Walled Carbon Nanotubes

J. Appl. Phys., 111, 064304 (2012). 

Dilip K. Singh, Parameswar K. Iyer and P. K. Giri

Interaction of carbon nanotubes with fluorophores : Photoluminescence and Adsorption studies.

Carbon, 2012 ( In Press)

Dilip K. Singh, Parameswar K. Iyer, and P. K. Giri,

Defect mediated efficient quenching of fluorescence of fluorescent dyes by single walled carbon nanotubes.

J. Phy. Chem. C 115, 24067 (2011 ).   

Dilip K. Singh, Parameswar .K. Iyer, and P. K. Giri

Defect evolution and structural improvement in low energy ion irradiated carbon nanotubes: Microscopic and spectroscopic studies.

Int. J. Nanosci. 10, 49 (2011)

Dilip K. Singh, Parameswar K. Iyer and P. K. Giri

Improved chemical synthesis of graphene using a safer solvothermal route.

Int. J. Nanosci. 10, 39 (2011).

Prasanta J. Goutam, Dilip K. Singh, Pravat K. Giri and Parameswar K. Iyer

Enhancing the Photostability of Poly(3-hexylthiophene) by Preparing Composites with Multiwalled Carbon Nanotubes.

J. Phy. Chem. B 115 (2011) 919. (View Supporting Information)

P. K. Giri, S. Bhattacharya, B. Chetia, Satchi Kumari, Dilip. K. Singh, P. K. Iyer

High yield chemical synthesis of hexagonal ZnO nanoparticles and nanorods with  excellent optical properties.

J. Nanosci. Nanotechnol. 12, 201 (2012).  

Dilip K. Singh, Parameswar .K. Iyer, and P. K. Giri

Diameter dependent oxidative stability of multiwalled carbon  nanotubes: Role of defects and effect of vacuum annealing.

J. Appl. Phys. 108, 084313 (2010).

(Also appeared in Virtual Journal of Nanoscale Science & Technology, November 1, 2010)

Dilip K. Singh, Parameswar .K. Iyer, and P. K. Giri,

Diameter dependent spectral features in X-ray diffraction & Raman scattering of multi-walled carbon nanotubes: Interlayer interactions and curvature effects.

Diamond and Related Materials 19, 1281 (2010).

Dilip K. Singh, Parameswar .K. Iyer, and P.K.Giri,

Quantitative analysis of diameter dependent properties of multi- walled carbon nantoubes.

AIP Conference Proceedings, Vol. 1147, 450-456, 2009.

Dilip K. Singh, P. K. Iyer, and P. K. Giri,

Optical Signature of Structural Defects in Single Walled and Multiwalled Carbon  Nanotubes.

J. Nanosci. Nanotechnol.  9, 5396 (2009).

Satchi Kumari, Dilip K Snigh, and P. K. Giri,

Strain Anisotropy in Freestanding Germanium Nanoparticles Synthesized by Ball Milling.

J. Nanosci. Nanotechnol.  9, 5231 (2009).

P. K. Reddy, P. J. Goutam, Diilp. K. Singh, A. K. Ghoshal, P. K. Iyer,

Poly(3-hexylthiphene) to fullerenes. Kinetic modeling and analysis of thermal degradation  pathway.

Polymer degradation and stability 94, 1839 (2009).

Dilip. K. Singh, P. K. Iyer, and P. K. Giri

Functionalization of Carbon nanotubes and study of its optical and structural  properties.

Nano Trends, A Journal of Nanotechnology and Its Applications” 4, 55 (2008).

P. K. Giri, S. Bhattacharyya, Dilip K. Singh, R. Kesavamoorthy,B. K. Panigrahi, and K.G. M. Nair

Correlation between microstructure and optical properties of ZnO nanoparticles  synthesized by ball milling.

J. Appl. Phys. 102, 093515 (2007).

P. K. Giri and Dilip K. Singh

Possible role of defects in the Visible   Photoluminescence from Single Walled and Multiwalled Carbon Nanotubes.

Mater. Res. Soc. Symp. Proc. Vol. 1018, EE07-03 (2007)

Dilip. K. Singh, P.K.Iyer, and P. K. Giri

Study of fluorescence quenching effect of Carbon Nanotubes.

Proc. 52nd DAE Solid State Physics Symposium, Ed. Amitabh Das, Meenakshi  Sunder and Shiv Kumar Gupta, Vol. 52, 2007, p.347.

 P. K. Giri, P. K. Patel, C. J. Panchal, S. Bhattacharyya, Satchi Kumari, Dilip K. Singh, V. A. Kheraj, N. M. Shah, et.al.

Studies on Zinc Oxide Nanorods Grown Electron Beam Evaporation Technique

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 37, 437 (2007).

Prabhakar P. Palni, Satchi Kumari, Neeraj Garg Baruah, Dilip K Singh, P. K. Giri

Effect of annealing on high quality Zinc Oxide Nanowires synthesized by  catalytic vapor-deposition

Nano Trends 3 (2007) 1–6.

Under Review/ preparation:

Book Chapters:

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P. J. Goutam, Dilip K. Singh, Parameswar K. Iyer, “Photostability of Poly-(3-hexylthiophene)-Multiwalled Carbon Nanotube Nanocomposites.”

Electroactive Polymers: Materials and Devices, Vol III, Macmillan, 2009 (ISBN 10: 0230-63890-2, ISBN 13: 978-0230-63890-7).

Conference Presentations: 

Schools Attended:

Foreign Professional Societies:

Indian Professional Societies:

Upcoming Scientific Meetings / conferences:

Few Optics/ Spectroscopy Institutes:

Appointments:

Academic Qualification: 

                 Ph.D thesis: Spectroscopic Studies of Diameter Dependent Properties, Defects and Defect Engineering in Single-walled and Multi-walled Carbon Nanotubes.

     Master thesis: Quantum confinement in a cylindrically symmetric finite wall potential well.

Other Academic Qualifications:

National Eligibility tests qualified:   GATE- 2005, JEST- 2005, CSIR SRF 2008.