Dr. Srinivasan Sampath
CAREER & EDUCATION
April-2014 - Present DST-INSPIRE Faculty and AcSIR-Assistant Professor, Polymer Division, CSIR-Central Leather Research Institute, Adyar, Chennai-600020, India,
November 2010 - October 2012 Postdoctoral Fellow, Department of Chemistry Northwestern University. Advisor: Prof. J Fraser Stoddart
August 2005 - November 2010 PhD in Chemistry, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum, India. Kerala University
Advisor: Prof. A. Ajayaghosh
July 2003 - July 2005 M.Sc Chemistry Indian Institute of Technology, Madras (IITM), India
June 2000- May 2005 B.Sc Chemistry D.G. Vaishnav College, Madras University, India
Researcher ID: C-6704-2008
AWARD & HONORS
2014 DST-INSPIRE Faculty Award – April 2014 to March 2019
2013 Post doctoral Fellowship WCU - KAIST, Korea February, 2013- March-2014.
2010 Post doctoral Fellowship Northwestern University November, 2010 – October 2012.
2010 Young Scientist Award- 22nd Kerala Science Congress, India, January 28-31, 2010.
2009 Best Oral Presentation Award- 5th JNC Research Conference on
Chemistry of Materials
2008 Best Poster Presentation Award- International Conference on
Functional Materials, IIT Madras.
2008 Indo-French (IFCPAR) Exchange Fellow, Institute Charles
Sadron, CNRS, France, .
2007 Best Presentation Award -ICYS-ICMR
Summer School on Nanomaterials, NIMS. Tsukuba, Japan,
2007 Senior Research Fellowship from UGC/CISR
2005 Junior Research Fellowship from UGC/CISR
2005 Qualified National Eligibility Test (NET) for Lectureship.
2003 Gold Medalist- Best outgoing student - College topper in
main and all allied subjects B.Sc
PROFESSIONAL ACTIVITIES
Reviewr for ACS Sustainable
Chemistry & Engineering, RSC Physical Chemistry Chemical Physics, RSC Advances, RSC Nanoscale
Message: I was born and raised in a beautiful seashore city, Chennai
and it is the fourth largest metropolitan city in India. I have done my B.Sc in
chemistry at Madras university, Chennai. I completed my M.Sc degree in
chemistry at Indian Institute of Technology Madras, India. After that I
qualified a national level entrance examination for research fellowship. In
2005, I moved to Trivandrum for my PhD under the supervision of Dr. A.
Ajayaghosh. During my stay in Trivandrum, I mainly involved in the design and
study of advanced functional materials based on carbon nanotubes and conjugated
organic molecules. My thesis was entitled as “Self-assembled Functional Hybrid
Materials: Design of Stable Organogels, Superhydrophobic Coatings and
Fluorescent Imaging Materials. In November 2010, I joined the Stoddart Research
Group as a postdoctoral fellow. Then In November 2011, I joined as joint
postdoctoral fellow in Coskun Group. Then I received DST-INSPIRE Faculty Award and joined CSIR-CLRI, India.
List
of Publications
Total Papers : 20
Sum of times
cited : 1014
Aggregate
Impact Factor : 204.6
h-index : 14
i10-index : 17
Selected Publications:
1) S. Srinivasan, W. H. Shin, S. Back. G.
Barin, O. Buyukcakir, R. Guliyev, Y. Jung, Ali Coskun,
Ordered Supramolecular Gels Based on
Graphene Oxide and Tetracationic Cyclophanes
Adv. Mater., 26, 2725–2729, 2014 (IF:
17.49, Citation Index: 11).
2) S. Srinivasan, A. N. Basuray, K. J.
Hartlieb, T. Aytun, S. I. Stupp, J. F. Stoddart
Direct Exfoliation of Graphite to
Graphene in Aqueous Media with Diazaperopyrenium Dications
Adv. Mater. 25, 2740-2745, 2013 (IF:
17.49, Citation Index: 32).
3) S. Srinivasan, W. H. Shin, J. W. Choi,
Ali Coskun,
A bifunctional approach for the preparation of graphene and ionic
liquid-based hybrid gels
J. Mater. Chemistry A, 1, 43-48, 2013
(IF: 7.443, Citation Index: 13)
4) A. C. Fahrenbach,* S. Srinivasan,* D. J.
Late, J. C. Barnes, S. L. Kleinman, N. Valley, K.J. Hartlieb, Z. Liu, V. P.
Dravid, G. C. Schatz, R. P. Van Duyne, J. F. Stoddart,
A Semiconducting Organic Radical
Cationic Host-Guest Complex
ACS
Nano. 6, 9964-9971, 2012 (*Equal contribution) (IF: 12.88, Citation Index: 14).
5) S. Srinivasan, P. A. Babu, S. Mahesh, A.
Ajayaghosh,
Reversible Self-Assembly of Entrapped
Fluorescent Gelators in Polymerized Styrene Gel Matrix: Erasable Thermal
Imaging via Recreation of Supramolecular Architectures
J. Am. Chem. Soc. 131, 15122-15123, 2009
(IF: 12.11, Citation Index: 95).
6) S. Srinivasan, S. S. Babu, V. K.
Praveen, A. Ajayaghosh,
Carbon Nanotube Triggered Self-Assembly
of Oligo(p-phenyleneviny-lene)s to Stable Hybrid Pi-Gels.
Angew. Chem. Int. Ed. 47, 5746-5749,
2008 (IF: 11.26, Citation Index: 91).
(Back-to-back articles, Highlighted article in
Nature Publishing Group Asia Materials).
7) S. Srinivasan, V. K. Praveen, R. Philip,
A. Ajayaghosh,
Bioinspired Superhydrophobic Coatings of
Carbon Nanotubes and Linear pi-Systems
Based on the “Bottom-up” Self-Assembly Approach.
Angew. Chem. Int. Ed. 47, 5750-5754,
2008 (IF: 11.26, Citation Index: 143).
(Rated as VIP and featured on the front cover,
one of the most-accessed articles in July, 2008, Highlighted in Angewandte
Chemie press release and in Materials Today).
Book Chapter
Supramolecular
Soft Matter: Applications in Materials and Organic Electronics: Interaction of
carbon nanotubes and small molecules. Publisher: John Wiley & Sons, Inc.
2011, 381-406. Print ISBN: 9780470559741 Online ISBN: 9781118095331.
S.
Srinivasan, A. Ajayaghosh
List of Patents Granted/Filed
1) Nanocomposite Material
useful for the Preparation of Superhydrophobic Coatings and a Process for the
Preparation Thereof
A. Ajayaghosh, S. Srinivasan, V. K.
Praveen, USA- US8323732 B2 (US 2010/0330277
A1), WO/2009/037717 (PCT/IN08/00538).
2) Crystalline bipyridinium radical
complexes and uses thereof.
A. Fahrenbach, J. Barnes, H. Li, F.
Stoddart, A. Basuray, S. Srinivasan,
US9120799 B2 (US 61/537,852, 2011 (22-Sept,
2012).
3) Carbazole end capped bipyridine
compounds and process for preparation thereof
A. Ajayaghogh, K. P. Divya, S.
Srinivasan, US 20140023883 A1 (WO/2012/110945) (PCT/IB2012/050656)
RESEARCH ACTIVITIES
PhD Work
1) Carbon Nanotube Triggered Self-Assembly of Oligo
(p-phenylenevinylene)s to Stable Hybrid pi-Gels: Carbon nanotubes (CNTs)
represent a novel class of quasi one-dimensional materials. Addition of small
amounts of CNTs to a solution of oligo(p-phenylenevinylene) (OPV1) in toluene
triggers the self-assembly which leads to the formation of a composite gel.
This strategy allows the dispersion and alignment of CNTs within an organic
self-assembly (Angew. Chem. Int. Ed. 2008, 47, 5746-5749; CI: 91).
2) Bioinspired Superhydrophobic Coatings of Carbon Nanotubes
and Linear pi Systems based on the “Bottom-up” Self-Assembly Approach: The
self-cleaning superhydrophobicity of plant leaves, particularly of the lotus
leaf is considered as a symbol of purity. We mimic lotus leaf by creating
superhydrophobic coatings through supramolecular interaction between OPVs and
CNTs. (Angew. Chem. Int. Ed. 2008, 47, 5750-5754, WO/2009/037717; CI: 143).
3) Reversible Self-Assembly of Entrapped Fluorescent
Gelators in Polymerized Styrene Gel Matrix: Erasable Thermal Imaging via
Recreation of Supramolecular Architectures:The reversible shift of emission in
fluorescent molecular gelators has been explored for the preparation of a
composite polymer film useful for erasable thermal imaging and secret
documentation and solvent vapour sensor. (J. Am. Chem. Soc. 2009, 131,
15122-15123; CI: 95).
PDF Work
4) A Bifunctional Approach for the Preparation of Ionic
liquid/Graphene Gels: We developed the concept of bifunctional approach by
using functional molecules which (1) can enable the solubilization of GO sheets
in ionic liquids (ILs) and (2) can facilitate the highly efficient thermal
reduction of GO to RGO on account of the high thermal stability of ILs. We have
demonstrated this concept by incorporating an imidazolium cation onto pyrene
which can interact with RGO via cation–pi and pi–pi interactions to form highly
stable, porous hybrid gel materials. (J. Mater. Chemistry A, 1, 43-48, 2013
(IF: 7.443, Citation Index: 13).
5) A Semiconducting Organic Radical Cationic Host Guest
Complex: Organic host-guest inclusion complexes driven by radical-radical
interactions are relatively rare in comparison to the commonality of their
donor-acceptor counterparts. Likewise, host-guest complexes which are
conductive in the solid-state have yet to be widely explored as materials for
electronic applications. We demonstrated the construction of an OFET using
lithographic techniques, which apply source and drain leads to single crystals
composed of a host-guest complex involving the diradical dicationic CBPQT2(•+)
ring complexed with the radical cationic MV•+ guest, and showed their p-type
semiconductivity. (ACS Nano., 6, 9964-9971, 2012) (IF: 12.88, Citation Index:
14).
6) Direct Exfoliation of Graphite to Graphene: In recent
times, the materials properties of graphene have generated ever-increasing
interest across multiple scientific disciplines including physics, material
science and chemistry. Generally, the techniques used to prepare graphene are
based on either physical processes, chemical methodologies or a blend of the
two. Physical methods are costly and chemical oxidation of graphite to graphene
oxide (GO), followed by reduction, results in reduced graphene oxide (RGO) in
large quantities, this method generates defect-laden RGO to the extent that the
resultant graphene is generally of lower quality than that produced by physical
methods. We addressed these issues by preparing graphene by direct exfoliation
of graphite through pi-pi interactions between the N,N′-dimethyl-2,9-diazaperopyrenium
dication and graphene in aqueous media. (Adv. Mater. 2013, 25, 2740-2745) (IF:
17.49, Citation Index: 32).
7) Ordered Supramolecular Gels Based on Graphene Oxide and
Tetracationic Cyclophanes: We develop a new strategy to form ordered
hierarchical supramolecular gels incorporating graphene oxide (GO) sheets and
cationic rigid macrocyles under mild conditions via self-assembly. These
ordered gels are stabilized by series of non-covalent ― donor-acceptor, π-π
stacking, cation-π ― interactions. Our theoretical studies indicate that
cationic macrocyles are positioned in between GO layers with a substantial
binding energy. (Adv. Mater. 2014, 26, 2725–2729) (IF: 17.49, Citation Index:
11).
PRESENT WORK/AREA OF INTEREST
We are working in the field of functional hybrid materials for opto-electronic applications. we design, synthesis and study small organic molecules. These molecules have been used to prepare nanocomposites through self-assemble approach. They may self-organize with
carbon based nanomaterials such as fullerene, carbon nanotubes, graphene and
carbon quantum dots via non-covalent interaction, which may lead to the
potential application of these materials in the optoelectronics and energy storage
devices.
We study the photo-physical and morphology properties of carbon quantum dots. The quantum dots are prepared
by “top-down” approach starting from graphite. The functionalized quantum dots
show interesting green emission as well as white emission. These materials are used for the preparation of nanocomposite as well as for biological studies
Controlled drug delivery is an important task in the field of medicine. We use microcapsules based on polymer nanocomposites for the controlled, sustained and targeted drug delivery.
FUNDING:
Title of
the project: Suparamolecular functionalization of π-Conjugated Molecules with
Semiconducting Nanorods for Optoelectronic Applications:
Duration: 5 Years
(1-4-2014 to 31-3-2019);
Sponsor: DST-INSPIRE Faculty Award;
Value: Rs:
85,00,000/-
EXPERTISE
·
Expertise in the design and synthesis of
molecules with self-assembling properties
·
Design, synthesis and characterization
of functional hybrid nanomaterials based on carbon nanotube and self-assembled
organic molecules.
·
Design, synthesis and characterization
of polymer and its composites
·
Design and preparation of
superhydrophobic and superoleophilic surfaces
·
Design and preparation of fluorescent
secret documentation
·
Design and synthesis of functional Ionic
liquids
·
Design and synthesis of hybrid gels based on graphene and ionic liquids
·
Controlled growth of nano and micro size
crystals on solid surface
Hand
on experience in the following instrumental techniques:
• Single photon
counter (lifetime, TRES studies), • Circular Dichroism (CD) spectrometer;
• UV-Vis-NIR
spectrophotometer; •
Fluorescence spectrophotometer;
• Nano-photon Raman
spectroscopy; • Confocal Raman spectroscopy,
• TEM (Jeol
2100F and H1800); • STEM
(HD 2300);
• FEI Quanta
E-Scanning Electrom Microscopy; • Environmental SEM (ESEM);
• Thermo X-ray
photoelectron spectroscopy (XPS); • Atomic force microscopy (AFM);
• Optical
polarized microscopy (OPM); • IR-Microscopy;
• Fluorescence microscopy; •
Cyclic voltammetry; NMR; FTIR;
•
MALDI-TOF-MS; LC-MS; • HPLC;
GPC; Optical-Raman