• Allosteric Transition Induced by Mg2+ Ion in a Transactivator Monitored by SERS 

  Kundu, Partha P.; Bhowmick, Tuhin; Swapna, Ganduri; Kumar, G. V. Pavan; Nagaraja, V.; Narayana, Chandrabhas (American Chemical Society, 2014)

  We demonstrate the utility of the surface-enhanced Raman spectroscopy (SERS) to monitor conformational transitions in protein upon ligand binding. The changes in protein's secondary and tertiary structures were monitored ...
• Conformational change in a urea catalyst induced by sodium cation and its effect on enantioselectivity of a Friedel-Crafts reaction 

  Chittoory, Arjun K.; Kumari, Gayatri; Mohapatra, Sudip; Kundu, Partha P.; Maji, Tapas K.; Narayana, Chandrabhas; Rajaram, Sridhar (Pergamon-Elsevier Science Ltd, 2014)

  While developing bis-camphorsulfonyl urea as a hydrogen-bonding catalysts, we discovered that the native conformation of the catalyst is unsuitable for inducing enantioselectivity. By complexing the catalyst with weakly ...
• Low cost, rapid synthesis of graphene on Ni: An efficient barrier for corrosion and thermal oxidation 

  Mogera, Umesha; Kurra, Narendra; Radhakrishnan, Dhanya; Narayana, Chandrabhas; Kulkarni, G. U. (Pergamon-Elsevier Science Ltd, 2014)

  Graphene because of its inert and impermeable nature holds a great promise as a protective coating against corrosion and oxidation. It is envisioned that graphene coated metals will be increasingly used in metal and ...
• Nanocrystalline Ag microflowers as a versatile SERS platform 

  Mettela, Gangaiah; Siddhanta, Soumik; Narayana, Chandrabhas; Kulkarni, G. U. (Royal Society of Chemistry, 2014)

  In this paper, the synthesis of Ag microflowers for use as manipulable and reusable substrates in surface enhanced Raman spectroscopy (SERS) is demonstrated, working with ultra-low volumes of the analyte. Flower-like AgBr ...
• Pressure-induced structural changes and insulator-metal transition in layered bismuth triiodide, BiI3: a combined experimental and theoretical study 

  Devidas, T. R.; Shekar, N. V. Chandra; Sundar, C. S.; Chithaiah, P.; Sorb, Y. A.; Bhadram, V. S.; Chandrabhas, Narayana; Pal, K.; Waghmare, Umesh V.; Rao, C. N. R. (IoP Publishing Ltd, 2014)

  Noting that BiI3 and the well-known topological insulator (TI) Bi2Se3 have the same high symmetry parent structures, and that it is desirable to find a wide-band gap TI, we determine here the effects of pressure on the ...
• Naphthoquinone-mediated Inhibition of Lysine Acetyltransferase KAT3B/p300, Basis for Non-toxic Inhibitor Synthesis 

  Vasudevarao, Mohankrishna Dalvoy; Mizar, Pushpak; Kumari, Sujata; Mandal, Somnath; Siddhanta, Soumik; Swamy, Mahadeva M. M.; Kaypee, Stephanie; Kodihalli, Ravindra C.; Banerjee, Amrita; Naryana, Chandrabhas; Dasgupta, Dipak; Kundu, Tapas Kumar (American Society Biochemistry Molecular Biology Inc, 2014)

  Background: 1,4-Naphthoquinone analogs, such as plumbagin, are toxic compounds due to their redox cycling and thiol-reactive properties. Results: The p300 inhibitor PTK1, a plumbagin derivative with greatly reduced toxicity, ...
• Temperature-induced electron-phonon coupling behaviour of AgGaS2 probed by Brillouin spectroscopy 

  Kavitha, C.; Narayana, Chandrabhas (Pergamon-Elsevier Science Ltd, 2014)

  Low temperature Brillouin scattering studies on Chalcopyrite AgGaS2 have been carried out between the temperatures ranges 20-300 K. We observe the Brillouin modes for AgGaS2 as follows: for crossed polarization (VH) the ...
• Thermally Stable Plasmonic Nanocermets Grown on Microengineered Surfaces as Versatile Surface Enhanced Raman Spectroscopy Sensors for Multianalyte Detection 

  Gupta, Nitant; Gupta, Disha; Aggarwal, Shantanu; Siddhanta, Soumik; Narayana, Chandrabhas; Barshilia, Harish C. (American Chemical Society, 2014)

  Noble metal nanoparticle-based plasmonic sensors, fabricated by top-down and colloidal routes, are widely used for high sensitivity detection of diverse analyte molecules using surface enhanced Raman spectroscopy (SERS). ...
• Polymorphism in Photoluminescent KNdW2O8: Synthesis, Neutron Diffraction, and Raman Study 

  Bhat, Swetha S. M.; Swain, Diptikanta; Narayana, Chandrabhas; Feygenson, Mikhail; Neuefeind, Joerg C.; Sundaram, Nalini G. (American Chemical Society, 2014)

  Polymorphs of KNdW2O8 (alpha-KNdW2O8 and beta-KNdW2O8) phosphors were synthesized by an efficient solution combustion technique for the first time. The crystal structure of the polymorphs analyzed from Rietveld refinement ...
• SERS and MD simulation studies of a kinase inhibitor demonstrate the emergence of a potential drug discovery tool 

  Karthigeyan, Dhanasekaran; Siddhanta, Soumik; Kishore, Annavarapu Hari; Perumal, Sathya S. R. R.; Agren, Hans; Sudevan, Surabhi; Bhat, Akshay V.; Balasubramanyam, Karanam; Subbegowda, Rangappa Kanchugarakoppal; Kundu, Tapas Kumar; Narayana, Chandrabhas (National Academy of Sciences, 2014)

  We demonstrate the use of surface-enhanced Raman spectroscopy (SERS) as an excellent tool for identifying the binding site of small molecules on a therapeutically important protein. As an example, we show the specific ...
• Tunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiation 

  Maiti, R.; Midya, A.; Narayana, Chandrabhas; Ray, S. K. (IoP Publishing Ltd, 2014)

  The modification of individual oxygen functional groups and the resultant optical properties of a graphene oxide suspension were investigated using a controlled photothermal reduction by infrared irradiation. The evolution ...
• Photoluminescence tuning of Na1-xKxNdW2O8 (0.0 <= x <= 0.7) nanoparticles: synthesis, crystal structure and Raman study 

  Bhat, Swetha S. M.; Huq, Ashfia; Swain, Diptikanta; Narayana, Chandrabhas; Sundaram, Nalini G. (Royal Society of Chemistry, 2014)

  A series of Na1-xKxNdW2O8 (0.0 <= x <= 0.7) nanoparticles have been synthesized by an efficient glycothermal technique for the first time. SEM measurements confirmed the particle size ranges from 30-200 nm with ellipsoidal ...
• Effect of pressure on octahedral distortions in RCrO3 (R=Lu, Tb, Gd, Eu, Sm): the role of R-ion size and its implications 

  Bhadram, Venkata Srinu; Swain, Diptikanta; Dhanya, R.; Polentarutti, Maurizio; Sundaresan, A.; Narayana, Chandrabhas (IoP Publishing Ltd, 2014)

  The effect of rare-earth ion size on the octahedral distortions in rare-earth chromites (RCrO3, R = Lu, Tb, Gd, Eu, Sm) crystallizing in the orthorhombic structure has been studied using Raman scattering and synchrotron ...
• Octahedral distortion induced magnetic anomalies in LaMn0.5Co0.5O3 single crystals 

  Manna, Kaustuv; Bhadram, Venkata Srinu; Elizabeth, Suja; Narayana, Chandrabhas; Kumar, P. S. Anil (American Institute of Physics, 2014)

  Single crystals of LaMn0.5Co0.5O3 belonging to the ferromagnetic-insulator and distorted perovskite class were grown using a four-mirror optical float zone furnace. The as-grown crystal crystallizes into an orthorhombic ...
• Isosteric substitution in cationic-amphiphilic polymers reveals an important role for hydrogen bonding in bacterial membrane interactions 

  Uppu, D. S. S. M.; Konai, M. M.; Baul, U.; Singh, P.; Siersma, T. K.; Samaddar, S.; Vemparala, S.; Hamoen, L. W.; Narayana, Chandrabhas; Haldar, Jayanta (Royal Society of Chemistry, 2016)

  Biomimetic antibacterial polymers, the functional mimics of antimicrobial peptides (AMPs), targeting the bacterial cell membrane have been developed to combat the problem of antibiotic resistance. Amphiphilicity, a balance ...
• A Dual Non-ATP Analogue Inhibitor of Aurora Kinases A and B, Derived from Resorcinol with a Mixed Mode of Inhibition 

  Karthigeyan, Dhanasekaran; Surabhi, Sudhevan; Mizar, Pushpak; Soumik, Siddhanta; Banerjee, Amrita; Sinha, Sarmistha Halder; Dasgupta, Dipak; Narayana, Chandrabhas; Kundu, Tapas Kumar (Wiley-Blackwell, 2016)

  Aurora kinases are the most commonly targeted mitotic kinases in the intervention of cancer progression. Here, we report a resorcinol derivative, 5-methyl-4(2-thiazolylazo) resorcinol (PTK66), a dual inhibitor of Aurora A ...
• Guest dependent Brillouin and Raman scattering studies of zeolitic imidazolate framework-8 (ZIF-8) under external pressure 

  Radhakrishnan, Dhanya; Narayana, Chandrabhas (American Institute Physics, 2016)

  We have investigated the pressure dependence of the acoustic modes of zeolitic imidazolate framework (ZIF-8) in different pressure transmitting mediums and also under non-hydrostatic conditions using high pressure Brillouin ...
• Investigation of Ca substitution on the gas sensing potential of LaFeO3 nanoparticles towards low concentration SO2 gas 

  Palimar, Sowmya; Kaushik, S. D.; Siruguri, V.; Swain, Diptikanta; Viegas, Alison E.; Narayana, Chandrabhas; Sundaram, Nalini G. (Royal Society of Chemistry, 2016)

  The present work investigates the superior ability of LaFeO3 (LaFeO) and La0.8Ca0.2FeO2.95 (LaCaFeO) nanoparticles to detect 3 ppm SO2 gas. The influence of calcium substitution on the sensing behaviour of LaFeO has been ...
• Interferroelectric transition as another manifestation of intrinsic size effect in ferroelectrics 

  Narayan, Bastola; Sorb, Y. A.; Loukya, B.; Samanta, Atanu; Senyshyn, Anatoliy; Ranjan Datta; Singh, Abhishek Kumar; Narayana, Chandrabhas; Ranjan, Rajeev (American Physical Society, 2016)

  In general, crystallite size reduction is known to suppress the ferroic order (polarization or magnetization) in ferroelectric and magnetic systems. Using free particles of a giant tetragonality (c/a-1 = 0.18) ferroelectric ...
• Improved broadband and omnidirectional light absorption in silicon nanopillars achieved through gradient mesoporosity induced leaky waveguide modulation 

  Karadan, Prajith; Anappara, Aji. A.; Moorthy, V. H. S.; Narayana, Chandrabhas; Barshilia, Harish C. (Royal Society of Chemistry, 2016)

  Metal assisted chemical etching in combination with nanosphere lithography is a low cost fabrication method to produce Si nanopillars (SiNPLs) with controlled size, periodicity and high aspect ratio on a large scale. These ...

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