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Number of items: 68.

Book Chapter

Sil, S and Gautam, R and Umapathy, S (2018) Applications of Raman and Infrared Microscopy to Materials and Biology. [Book Chapter]

Conference Paper

Das, PK and Dhiman, N and Umapathy, S and Bhardwaj, A (2022) External probe-based Amplified Spontaneous Emission in Cd1-xZnxSe/ZnSe quantum dots for fiber laser application. In: 2022 IEEE International Conference on Emerging Electronics, 11 - 14 Dec 2022, Bangalore.

Sil, S and Mukherjee, R and Kumar, NS and Umapathy, S (2020) Potential and challenges of pathogen detection using Raman spectroscopy. In: Biomedical Spectroscopy, Microscopy, and Imaging 2020, 6-10 April 2020, Virtual, Online, France.

Kumar, S and Visvanathan, A and Arivazhagan, A and Santhosh, V and Somasundaram, K and Umapathy, S (2020) Prognosis, diagnosis and the influence of inhibitors: Raman spectroscopic study of radioresistant brain cancer stem-like cells. In: Biomedical Spectroscopy, Microscopy, and Imaging 2020, 6-10 April 2020, France.

Nayak, DR and Umapathy, S (2017) Surface enhanced raman spectroscopic studies using galvanic nano-buds. In: JSAP-OSA Joint Symposia, JSAP 2017, 18 - 21 September 2017, Fukuoka.

Samuel, Ashok Z and Ramakrishnan, S and Umapathy, S (2010) 2D Correlation Raman Spectroscopy of Hyperbranched Polymer. In: 22nd International Conference on Raman Spectroscopy, AUG 08-13, 2010, Boston, MA, pp. 693-694.

Umapathy, S and Mallick, B. and Lakshmanna, A. (2010) Ultrafast Raman Loss Spectroscopy: Differences from FSRS and origin of line shapes on resonant excitation. In: 22nd International Conference on Raman Spectroscopy, AUG 08-13, 2010, Boston, pp. 22-23.

Journal Article

Pasha, A and Pramanik, P and George, JK and Dhiman, N and Zhang, H and Sidhik, S and Mandani, F and Ranjan, S and Nagaraja, AT and Umapathy, S and Mohite, AD and Balakrishna, RG (2023) Cationic and Anionic Vacancy Healing for Suppressed Halide Exchange and Phase Segregation in Perovskite Solar Cells. In: ACS Energy Letters . pp. 3081-3087.

Prakash, O and Umapathy, S (2023) Raman spectroscopy study of CdS nanorods and strain induced by the adsorption of 4-mercaptobenzoic acid. In: The Journal of chemical physics, 158 (13). p. 134719.

Das, PK and Dhiman, N and Umapathy, S and Bhardwaj, A (2023) Observation of amplified spontaneous emission in Cd1-xZnxSe/ZnSe alloyed quantum dots through CW pumping. In: Gaceta Mexicana de Oncologia, 13 (9). pp. 2595-2603.

Satpathy, G and Chandra, GK and Elayaraja, K and Mahapatra, DR and Subramania, A and Guo, Z and Umapathy, S and Manikandan, E (2022) Nanoparticles and Bacterial Interaction of Host-Pathogens and the Detection Enhancement of Biomolecules by Fluorescence Raman Spectroscopic Investigation. In: Engineered Science, 20 . pp. 341-351.

Kharangarh, PR and Ravindra, NM and Singh, G and Umapathy, S (2022) Synthesis and characterization of Nb-doped strontium cobaltite@GQD electrodes for high performance supercapacitors. In: Journal of Energy Storage, 55 .

Singh, S and Kumbhar, D and Reghu, D and Venugopal, SJ and Rekha, PT and Mohandas, S and Rao, S and Rangaiah, A and Chunchanur, SK and Saini, DK and Umapathy, S (2022) Culture-Independent Raman Spectroscopic Identification of Bacterial Pathogens from Clinical Samples Using Deep Transfer Learning. In: Analytical Chemistry, 94 (42). pp. 14745-14754.

Singh, S and Verma, T and Nandi, D and Umapathy, S (2022) Herbicides 2,4-Dichlorophenoxy Acetic Acid and Glyphosate Induce Distinct Biochemical Changes in E. coli during Phenotypic Antibiotic Resistance: A Raman Spectroscopic Study. In: Journal of Physical Chemistry B .

Gautam, R and Chaturvedi, D and Sil, S and Kuhar, N and Singh, S and Umapathy, S (2022) Characterization of Aggregating Agents towards Sensitive Optical Detection of Tryptophan Using Lab-on-a-Chip. In: Photonics, 9 (9).

Barak, A and Dhiman, N and Sturm, F and Rauch, F and Lakshmanna, YA and Findlay, KS and Beeby, A and Marder, TB and Umapathy, S (2022) Excited-State Intramolecular Charge-Transfer Dynamics in 4-Dimethylamino-4′-cyanodiphenylacetylene: An Ultrafast Raman Loss Spectroscopic Perspective. In: ChemPhotoChem .

Kharangarh, PR and Ravindra, NM and Singh, G and Umapathy, S (2022) Synthesis of luminescent graphene quantum dots from biomass waste materials for energy-related applications—An overview. In: Energy Storage .

Barak, A and Dhiman, N and Sturm, F and Rauch, F and Lakshmanna, YA and Findlay, KS and Beeby, A and Marder, TB and Umapathy, S (2022) Solvent Polarity Governs Ultrafast Structural Dynamics: A Case Study of 4-Dimethylamino-4′-carbomethoxydiphenylacetylene. In: Journal of Physical Chemistry C, 127 (12). pp. 5855-5865.

Kuhar, N and Sil, S and Umapathy, S (2021) Potential of Raman spectroscopic techniques to study proteins. In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 258 .

Kumbhar, D and Palliyarayil, A and Reghu, D and Shrungar, D and Umapathy, S and Sil, S (2021) Rapid discrimination of porous bio-carbon derived from nitrogen rich biomass using Raman spectroscopy and artificial intelligence methods. In: Carbon, 178 . pp. 792-802.

Verma, T and Majumdar, S and Yadav, S and Ahmed, SM and Umapathy, S and Nandi, D (2021) Cell-free hemoglobin is a marker of systemic inflammation in mouse models of sepsis: A Raman spectroscopic study. In: Analyst, 146 (12). pp. 4022-4032.

Sil, S and Kuhar, N and Roy, K and Chaturvedi, D and Morita, S and Ozaki, Y and Umapathy, S (2021) Understanding phase transition and vibrational mode coupling in ammonium nitrate using 2D correlation Raman spectroscopy. In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 254 .

Melavanki, R and Sharma, K and Muttannavar, V T and Kusanur, R and Katagi, K and Patra, S M and Umapathy, S and Sadasivuni, K K and Shelar, V M and Singh, D and Patil, N R and Koppal, V V (2021) Quantum chemical computations, fluorescence spectral features and molecular docking of two biologically active heterocyclic class of compounds. In: Journal of Photochemistry and Photobiology A: Chemistry, 404 .

Verma, T and Annappa, H and Singh, S and Umapathy, S and Nandi, D (2021) Profiling antibiotic resistance in Escherichia coli strains displaying differential antibiotic susceptibilities using Raman spectroscopy. In: Journal of Biophotonics, 14 (1).

Kuhar, N and Nazeer, SS and Kumar, RV and Mukherjee, G and Umapathy, S (2021) Infrared Microspectroscopy With Multivariate Analysis to Differentiate Oral Hyperplasia From Squamous Cell Carcinoma: A Proof of Concept for Early Diagnosis. In: Lasers in Surgery and Medicine .

Gaur, R and Manikandan, P and Manikandan, D and Umapathy, S and Padhy, HM and Maaza, M and Elayaperumal, M (2021) Noble Metal Ion Embedded Nanocomposite Glass Materials for Optical Functionality of UV�Visible Surface Plasmon Resonance (SPR) Surface-Enhanced Raman Scattering (SERS) X-ray and Electron Microscopic Studies: An Overview. In: Plasmonics .

Sil, S and Mukherjee, R and Kumbhar, D and Reghu, D and Shrungar, D and Kumar, NS and Singh, UK and Umapathy, S (2021) Raman spectroscopy and artificial intelligence open up accurate detection of pathogens from DNA-based sub-species level classification. In: Journal of Raman Spectroscopy .

Elayaperumal, M and Gnanasekaran, K and Moodley, MK and Mwakikunga, BW and Gaur, R and Umapathy, S and Ladchumananandasivam, R and Maaza, M (2021) Ultrananocrystalline diamond-like carbon (UN-DLC) assembled on epitaxial ZnO film by PLD technique and SIMS Raman Rutherford spectroscopic fingerprint investigation. In: Journal of Raman Spectroscopy .

Vega-Dominguez, P and Peterson, E and Pan, M and Di Maio, A and Singh, S and Umapathy, S and Saini, DK and Baliga, N and Bhatt, A (2020) Biofilms of the non-tuberculous Mycobacterium chelonae form an extracellular matrix and display distinct expression patterns. In: Cell Surface, 6 .

Kuhar, N and Umapathy, S (2020) Probing the Stepwise Unfolding of Bovine Serum Albumin Using 2D Correlation Raman Spectroscopic Analysis. In: Analytical Chemistry, 92 (19). pp. 13509-13517.

Mukherjee, R and Verma, T and Nandi, D and Umapathy, S (2020) Identification of a resonance Raman marker for cytochrome to monitor stress responses in Escherichia coli. In: Analytical and Bioanalytical Chemistry, 412 (22). pp. 5379-5388.

Verma, T and Annappa, H and Singh, S and Umapathy, S and Nandi, D (2020) Profiling antibiotic resistance in Escherichia coli strains displaying differential antibiotic susceptibilities using Raman spectroscopy. In: Journal of Biophotonics . (In Press)

Mukherjee, R and Verma, T and Nandi, D and Umapathy, S (2020) Understanding the effects of culture conditions in bacterial growth: A biochemical perspective using Raman microscopy. In: Journal of Biophotonics, 13 (1).

Satpathy, G and Chandra, GK and Manikandan, E and Mahapatra, DR and Umapathy, S (2020) Pathogenic Escherichia coli (E. coli) detection through tuned nanoparticles enhancement study. In: Biotechnology Letters, 42 (5). pp. 853-863.

Selvarajan, P and Kundu, K and Sathish, CI and Umapathy, S and Vinu, A (2020) Enriched Photophysical Properties and Thermal Stability of Tin(II) Substituted Lead-Based Perovskite Nanocrystals with Mixed Organic-Inorganic Cations. In: Journal of Physical Chemistry C, 124 (17). pp. 9611-9621.

Kesavan, T and Partheeban, T and Vivekanantha, M and Prabu, N and Kundu, M and Selvarajan, P and Umapathy, S and Vinu, A and Sasidharan, M (2020) Design of P-Doped Mesoporous Carbon Nitrides as High-Performance Anode Materials for Li-Ion Battery. In: ACS Applied Materials and Interfaces, 12 (21). pp. 24007-24018.

Pal, AK and Chandra, GK and Umapathy, S and Bharathi Mohan, D (2020) Ultra-sensitive, reusable, and superhydrophobic Ag/ZnO/Ag 3D hybrid surface enhanced Raman scattering substrate for hemoglobin detection. In: Journal of Applied Physics, 127 (16).

Kumar, S and Gopinathan, R and Chandra, GK and Umapathy, S and Saini, DK (2020) Rapid detection of bacterial infection and viability assessment with high specificity and sensitivity using Raman microspectroscopy. In: Analytical and Bioanalytical Chemistry, 412 (11). pp. 2505-2516.

Prakash, O and Sil, S and Verma, T and Umapathy, S (2019) Direct Detection of Bacteria Using Positively Charged Ag/Au Bimetallic Nanoparticles: A Label-free Surface-Enhanced Raman Scattering Study Coupled with Multivariate Analysis. In: Journal of Physical Chemistry C, 124 (1). pp. 861-869.

Cha, W and Kim, IY and Lee, JM and Kim, S and Ramadass, K and Gopalakrishnan, K and Premkumar, S and Umapathy, S and Vinu, A (2019) Sulfur-Doped Mesoporous Carbon Nitride with an Ordered Porous Structure for Sodium-Ion Batteries. In: ACS Applied Materials and Interfaces, 11 (30). pp. 27192-27199.

Nayak, DR and Bhat, N and Venkatapathi, M and Umapathy, S (2018) Signal Enhancement from Tunable SERS Substrates: Design and Demonstration of Multiple Regimes of Enhancement. In: Journal of Physical Chemistry C, 122 (16). pp. 9134-9140.

Benzigar, MR and Joseph, S and Ilbeygi, H and Park, DH and Sarkar, S and Chandra, G and Umapathy, S and Srinivasan, S and Talapaneni, SN and Vinu, A (2018) Highly Crystalline Mesoporous C60 with Ordered Pores: A Class of Nanomaterials for Energy Applications. In: Angewandte Chemie - International Edition, 57 (2). pp. 569-573.

Nayak, D R and Bhat, N and Venkatapathi, M and Umapathy, S (2017) Impact of ultrathin dielectric spacers on SERS: energy transfer between polarized charges and plasmons. In: JOURNAL OF MATERIALS CHEMISTRY C, 5 (8). pp. 2123-2129.

Rai, NK and Lakshmanna, AY and Namboodiri, VV and Umapathy, S (2012) Basic principles of ultrafast Raman loss spectroscopy. In: Journal of Chemical Sciences, 124 (1, SI). pp. 177-186.

Samuel, Ashok Zachariah and Umapathy, S and Ramakrishnan, S (2011) Functionalized and Postfunctionalizable Porous Polymeric Films through Evaporation-Induced Phase Separation Using Mixed Solvents. In: ACS Applied Materials & Interfaces, 3 (9). pp. 3293-3299.

Mohapatra, Himansu and Umapathy, S (2010) Time-Resolved Resonance Raman Studies on Proton-Induced Electron-Transfer Reaction from Triplet Excited State of 2-Methoxynaphthalene to Decafluorobenzophenone. In: Journal of Physical Chemistry A, The, 114 (47). pp. 12447-12451.

Umapathy, S and Mallick, B and Lakshmanna, A (2010) Mode-dependent dispersion in Raman line shapes: Observation and implications from ultrafast Raman loss spectroscopy. In: Journal of Chemical Physics, 133 (2). 024505-024505-6.

Deckert, V and George, MW and Umapathy, S (2008) Raman spectroscopy at the beginning of the twenty-first century II. In: Journal of Raman Spectroscopy, 39 (11). pp. 1508-1511.

Chowdary, Praveen D and Umapathy, S (2008) Ultrafast dynamics and photochemistry of pi-pi * excited trans-azobenzene -comprehensive analysis of resonance Raman intensities. In: Journal of Raman Spectroscopy, 39 (11). pp. 1538-1555.

Abraham, B and Sastri, C and Maiya, B and Umapathy, S (2004) Resonance Raman spectroscopic studies of $[Ru(phen)_{2}qdppz]^{2+}$ and its interactions with calf thymus DNA. In: Journal of Raman Spectroscopy, 35 (1). pp. 13-18.

Puranik, M and Umapathy, S (2002) Excited state structure and dynamics of p-benzoquinone and bromanil from time-resolved resonance Raman spectra and simulation. In: Bulletin of the Chemical Society of Japan, 75 (5). pp. 1057-1064.

Balakrishnan, G and Mohandas, P and Umapathy, S (2001) Time resolved resonance raman, ab initio Hartree-Fock, and density functional theoretical studies on the transients states of perfluoro-p-benzoquinone. In: Journal Of Physical Chemistry A, 105 (33). pp. 7778-7789.

Puranik, M and Chandrasekhar, J and Umapathy, S (2001) Structure of the triplet excited state of tetrabromo-p-benzoquinone from time-resolved resonance Raman spectra and ab initio calculations. In: Chemical Physics Letters, 331 (1-3). pp. 224-230.

Kwok, WM and Ma, C and Matousek, P and Parker, AW and Toner, WT and Umapathy, S and Towrie, M and Phillips, D (2001) A determination of the structure of the intramolecular charge transfer state of 4-dimethylaminobenzonitrile (DMABN) by time-resolved resonance Raman spectroscopy. In: Journal of Physical Chemistry A, 105 (6). pp. 984-990.

Kwok, WM and Gould, I and Ma, C and Puranik, M and Umapathy, S and Matousek, P and Parker, AW and Phillips, D and Toner, WT and Towrie, M (2001) Vibrational studies of ground state 4-dimethylaminobenzonitrile (DMABN) and its ring deuterated isotopomer DMABN-d(4). In: Physical Chemistry Chemical Physics, 3 (12). pp. 2424-2432.

Anandhi, R and Umapathy, S (2000) Intermolecular hydrogen abstraction from triplet excited state of decafluorobenzophenone: a Raman investigation. In: Journal of Raman Spectroscopy, 31 (4). pp. 331-338.

Balakrishnan, G and Umapathy, S (1999) Photogenerated radical intermediates of vitamin K-1: a time-resolved resonance Raman study. In: Journal of Molecular Structure, 475 (1). pp. 5-11.

Anandhi, R and Balakrishnan, G and Mohandas, P and Umapathy, S (1999) Structure-reactivity correlations of excited states of perfluorinated compounds: A time resolved Raman study. In: Laser Chemistry, 19 (1-4). pp. 343-348.

Anandhi, R and Umapathy, S (1998) Resonance Raman spectroscopic studies on the Conducting State of Polyvinylcarbazole and its Model Compounds. In: Journal of Raman Spectroscopy, 29 (10-11). pp. 901-906.

Balakrishnan, G and Babaei, A and McQuillan, AJ and Umapathy, S (1998) Resonance Raman and infrared spectral studies on radical anions of model photosynthetic reaction center quinones (naphthoquinone derivatives). In: Journal of Biomolecular Structure & Dynamics, 16 (01). pp. 123-131.

Lednev, IK and Ye, TQ and Matousek, P and Towrie, M and Foggi, P and Neuwahl, FVR and Umapathy, S and Hester, RE and Moore, JN (1998) Femtosecond time-resolved UV-visible absorption spectroscopy of trans-azobenzene: dependence on excitation wavelength. In: Chemical Physics Letters, 290 (1-3). pp. 68-74.

Anandhi, R and Rajesh, CS and Das, Suresh and Umapathy, S (1997) Transient absorption studies on 3,6-dibromo polyvinylcarbazole and its model compounds. In: Journal of Photochemistry and Photobiology A: Chemistry, 106 (1-3). pp. 135-139.

Balakrishnan, G and Umapathy, S (1997) Intermolecular hydrogen atom abstraction from the fluoranil triplet excited state: a Raman study. In: Chemical Physics Letters, 270 (5-6). pp. 557-563.

Biswas, N and Umapathy, S and Kalyanaraman, C and Sathyamurthy, N (1995) Resonance raman intensity analysis of polyatomic molecules. In: Proceedings Of The Indian Academy Of Sciences-Chemical Sciences, 107 (3). pp. 233-244.

Biswas, N and Umapathy, S (1995) Wavepacket dynamical studies on trans-azobenzene: absorption spectrum and resonance Raman excitation profiles of the n??* transition. In: Chemical Physics Letters, 236 (1-2). 24-29 .

Engert, C and Umapathy, S and Kiefer, W and Hamaguchi, H (1994) Dynamic structure of charge carrier in polyaniline by near-infrared excited resonance Raman spectroscopy. In: Chemical physics letters, 218 (1-2). pp. 87-92.

Anandhi, R and Balakrishnan, G and Umapathy, S (1993) Ultrafast laser spectroscopy-A tool chemists and biologists. In: Current Science (Bangalore), 65 (4). pp. 332-336.

Editorials/Short Communications

Umapathy, S (1992) Ultrafast electron transfer rates as influenced by vibrational modes. In: Current Science (Bangalore), 63 (7). pp. 343-345.

This list was generated on Sat Jun 15 04:47:44 2024 IST.