Associate Professor VALIYAVEETTIL, Suresh
BSc and MSc Chemistry, Calicut University, India; Ph.D. University of Victoria, BC Canada; Postdoc @ Max-Planck Institute Mainz, Germany, Cornell University, New York, USA.
Department of Chemistry, NUS
3 Science Drive 3
Tel. (65) 6516 4327
Fax. (65) 6779 1691
Areas of research – Materials Chemistry
Biomineralization & Biomaterials
- Environmental pollution and remedies
- Molecular materials for sensors and ion transport membranes
- Molecular recognition and Supramolecular chemistry
- Nanomaterials and Nanotoxicology
- Surface active materials
- Synthesis of small molecules and polymers
- Water purification
Brief description of current research work:
My group’s research interests are in the area of developing new functional materials for interesting applications. We have developed expertise in synthesis, characterisation and exploring applications of a range of materials. Please see more details below.
1. Water purification:
Emerging contaminants such as nanopollutants and dissolved organic pause significant problems to the potable water supply in various countries. In fact, availability of high quality water for human consumption is going to be one of the big challenges for the coming century. Recently, we have started developing sustainable technologies for water purification using renewable resources. Such materials are easy to access in large quantities and do not create environmental pollution issues due to biodegradability. The water treatment methodologies developed are easy to be incorporated at rural areas with minimum training of the local population and investment.
- Mallampati, R.; Valiyaveettil, S.; Eggshell Membrane-Supported Recyclable Catalytic Noble Metal Nanoparticles for Organic Reactions, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2014, 2, 855-859.
- Dhandayuthapani, B.; Mallampati, R.; Sriramulu, D., Dsouza, R. F.; Valiyaveettil, S.; PVA/Gluten Hybrid Nanofibers for Removal of Nanoparticles from Water, ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2014, 2, 1014-1021.
- Mallampati, R; Valiyaveettil, S, Apple Peels-A Versatile Biomass for Water Purification?; ACS APPLIED MATERIALS & INTERFACES, 2013, 5, 4443-4449.
- Mallampati, R., Valiyaveettil, S., Biomimetic metal oxides for the extraction of nanoparticles from water, NANOSCALE, 2013, 5, 3395-3399
- Mallampati R., Valiyaveettil S., Application of Tomato Peel as an Efficient Adsorbent for Water Purification – Alternative Biotechnology?, RSC Adv., 2012, 2 (26), 9914 – 9920.
2. Biomaterial synthesis and tissue engineering:
Hard tissue (e.g., bones, teeth, eggshells, sea shells, corals) formation in biological systems is well controlled and fascinating from the structural and functional aspects. For example, simple eggshells are interesting owing to their fast formation rates in Avian species (~5g/24h) and defect free architecture. We are interested in exploring the molecular mechanism of nucleation/formation of such functional calcium rich composite materials. Two approaches have been pursued in our group: one involving the analysis of biomaterials collected from the environment and the other focusing on the development of synthetic polymers that can act as a template or protein mimic in the in vitro
mineralization to form complex structures.
- N. Mahanta, Y. Teow, S. Valiyaveettil, Fabrication and Characterization of Hybrid Nanofibers from Poly(Vinyl Alcohol), Milk Protein and Metal Carbonates, J. Nanosci and Nanotech., 2012, 12, 6156-616.
- R. Lakshminarayanan, S. Vivekanandan, R. P. Samy, Y. Banerjee, E. Ooi; K. W. Teo, S. D. S. Jois,.; R. M. Kini, S. Valiyaveettil, Structure, Self-Assembly, and Dual Role of a -Defensin-like Peptide from the Chinese Soft-Shelled Turtle Eggshell Matrix, Journal of the American Chemical Society (JACS) (2008), 130(14), 4660-4666
- S. Swaminathan, J. Subbiah, H. Li, P. K. Ajikumar, M. Vetrichelvan, S. Valiyaveettil, Synthesis and patterning of luminescent CaCO3-Poly(p-Phenylene) hybrid materials and thin films; Adv. Funct. Mat., 2007, 17 (10): 1698-1704.
- S. Gayathri, R. Lakshminarayanan, J. C. Weaver, D. E. Morse, R. M. Kini, S. Valiyaveettil, In vitro study of magnesium-calcite biomineralization in the skeletal materials of the seastar Pisaster giganteus, Chemistry - A European Journal 2007, 13 (11): 3262-3268
- P. K. Ajikumar, S. Vivekanandan, R. Laxminarayanan, S. D. S. Jois, R. M. Kini, S. Valiyaveettil, Mimicking the function of eggshell matrix proteins: Role of multiplets of charged amino acid residues and self-assembly of peptides in biominerlization, Angewandte Chem.Int. Edn., (2005), 44, 5476-5479.
- R. Lakshminarayanan, R. M. Kini, S. Valiyaveettil, Investigation of the role of ansocalcin in the biomineralization in goose eggshell matrix, PNAS (Proceedings of the National Academy of Sciences of the United States of America) (2002), 99 (8), 5155-5159.
3. Synthesis and characterization of organic molecules and polymers :
Conjugate molecules and polymers are interesting due to their electronic and optical properties. During the past few years, we have designed a series of 1D, 2D and 3D-polymers polyphenylene architectures. Such materials also form interesting morphologies in thin films or in the bulk lattice. Current interest include developing novel synthetic methodologies, exploring potential applications of these materials in the area of photovoltaics, sensors and biomedical engineering.
- Keerthi, A.; Sriramulu, D.; Liu, Y.; Timothy, C. T. Y.; Wang, Q.; Architectural influence of carbazole push-pull-pull dyes on dye sensitized solar cells, DYES AND PIGMENTS, 2013, 99, 787-797.
- Keerthi A.; Valiyaveettil S. Regioisomers of Perylenediimide: Synthesis, Photophysical, and Electrochemical Properties, J. Phys. Chem. B, 2012, 116, 4603-4614.
- Keerthi A., Liu Y., Wang Q., Valiyaveettil S., Synthesis of Perylene Dyes with Multiple Triphenylamine Substituents, Chemistry-Eur. J., 2012, 18, 11669-11676.
- Balaji G., Ganapathy; S. Valiyaveettil; Synthesis and Properties of Symmetric and Unsymmetric Dibenzothienopyrroles, Org. Lett., 2009, 11, 3358-61.
- Balaji G., Kale T. S., Keerthi A., Della Pelle A. M .,Thayumanavan S., Valiyaveettil S., Low Band Gap Thiophene-Perylene Diimide Systems with Tunable Charge Transport Properties, Org. Lett., 2011, 13, 18 – 21.
4. Nanomaterials and Nanotoxicology:
Nanoscience and nanotechnology are platforms for developing interesting applications in the near future. We are interested in 2 areas of this exciting filed - one involves the synthesis and characterization of novel nanomaterials, investigating their properties and potential applications. The second are of interest focus on understanding the interaction of nanomaterials with living systems. Since many consumer products contains nanomaterials, it is important for us to understand how such small particles interact with living systems and explore potential toxicity or harmful effects. In addition, unravelling the interaction of nanomaterials with living systems also allows us to develop new generation of nanodrugs for different diseases.
- Wang C. Y., Valiyaveettil S. Correlation of biocapping agents with cytotoxic effects of silver nanoparticles on human tumor cells, RSC ADVANCES, 2013, 14329-14338.
- Teow Y., Asharani P. V., Hande M. P., Valiyaveettil S., Health impact and safety of engineered nanomaterials, Chem. Commun. 2011, 47, 7025-7038.
- Asharani, P. V., Yi, L. W., Gong, Z. Y,. Valiyaveettil, S. Comparison of the toxicity of silver, gold and platinum nanoparticles in developing zebrafish embryos, Nanotoxicology, 2011, 5, 43-54.
- AshaRani P. V., Ng Xinyi, Manoor Prakash Hande and Suresh Valiyaveettil.DNA damage and p53 mediated growth arrest in human cells treated with platinum nanoparticles. Nanomedicine, 2010, 5(1). 51-64.
- AshaRani P. V., Sethu S.., Zhong S. P., Lim C. T., Hande M. P. and Valiyaveettil S. Effects of silver, gold and platinum nanoparticles on normal human erythrocytes. Adv. Funct. Mater.2010, 20(8), 1233-42.
- AshaRani P. V., Hande M. P., Valiyaveettil S. Anti-proliferative activity of silver nanoparticles, BMC Cell Biology, 2009, 10, Article Number: 65.
Further details on all ongoing projects in the group is available from our publication and upon request. You can contact me on my email at email@example.com.