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Rathnakumar S, Bhaskar S, Sivaramakrishnan V, Kambhampati NSV, Srinivasan V, Ramamurthy SS. Tecoma stans Floral Extract-Based Biosynthesis for Enhanced Surface Plasmon-Coupled Emission and a Preliminary Study on Fluoroimmunoassay. Anal Chem 2024; 96:4005-4012. [PMID: 38415592 DOI: 10.1021/acs.analchem.3c01441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
We demonstrate the synthesis of biogenic supported silver spiked star architectures and their application to increase the electromagnetic field intensity at its tips that enhance plasmon-coupled emission. Tecoma stans floral extract has been used to synthesize silver nanocubes and spiked stars. We observe ∼445-fold and ∼680-fold enhancements in spacer and cavity configurations, respectively, in the SPCE platform. The hotspot intensity and Purcell factor are evaluated by carrying out finite-difference time-domain (FDTD) simulations. Time-based studies are presented to modulate the sharpness of the edges wherein an increase in the tip sharpness with the increase in reaction time up to 5 h is observed. The unique morphology of the silver architectures allowed us to utilize them in biosensing application. A SPCE-based fluoroimmunoassay was performed, achieving a 1.9 pg/mL limit of detection of TNF-α cytokine. This combination of anisotropic architectures, SPCE and immunoassay prove to be a powerful platform for the ultrasensitive detection of biomarkers in surface-bound assays.
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Affiliation(s)
- Sriram Rathnakumar
- Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Puttaparthi, 515134, Andhra Pradesh, India
| | - Seemesh Bhaskar
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Nick Holonyak Jr. Micro and Nanotechnology Laboratory (HMNTL), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Venketesh Sivaramakrishnan
- Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Puttaparthi, 515134, Andhra Pradesh, India
| | - Naga Sai Visweswar Kambhampati
- Department of Chemistry, STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Puttaparthi, 515134, Andhra Pradesh, India
| | - Venkatesh Srinivasan
- Department of Chemistry, STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Puttaparthi, 515134, Andhra Pradesh, India
| | - Sai Sathish Ramamurthy
- Department of Chemistry, STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam Campus, Puttaparthi, 515134, Andhra Pradesh, India
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2
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Bhaskar S. Biosensing Technologies: A Focus Review on Recent Advancements in Surface Plasmon Coupled Emission. MICROMACHINES 2023; 14:mi14030574. [PMID: 36984981 PMCID: PMC10054051 DOI: 10.3390/mi14030574] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 02/23/2023] [Accepted: 02/26/2023] [Indexed: 05/14/2023]
Abstract
In the past decade, novel nano-engineering protocols have been actively synergized with fluorescence spectroscopic techniques to yield higher intensity from radiating dipoles, through the process termed plasmon-enhanced fluorescence (PEF). Consequently, the limit of detection of analytes of interest has been dramatically improvised on account of higher sensitivity rendered by augmented fluorescence signals. Recently, metallic thin films sustaining surface plasmon polaritons (SPPs) have been creatively hybridized with such PEF platforms to realize a substantial upsurge in the global collection efficiency in a judicious technology termed surface plasmon-coupled emission (SPCE). While the process parameters and conditions to realize optimum coupling efficiency between the radiating dipoles and the plasmon polaritons in SPCE framework have been extensively discussed, the utility of disruptive nano-engineering over the SPCE platform and analogous interfaces such as 'ferroplasmon-on-mirror (FPoM)' as well as an alternative technology termed 'photonic crystal-coupled emission (PCCE)' have been seldom reviewed. In light of these observations, in this focus review, the myriad nano-engineering protocols developed over the SPCE, FPoM and PCCE platform are succinctly captured, presenting an emphasis on the recently developed cryosoret nano-assembly technology for photo-plasmonic hotspot generation (first to fourth). These technologies and associated sensing platforms are expected to ameliorate the current biosensing modalities with better understanding of the biophysicochemical processes and related outcomes at advanced micro-nano-interfaces. This review is hence envisaged to present a broad overview of the latest developments in SPCE substrate design and development for interdisciplinary applications that are of relevance in environmental as well as biological heath monitoring.
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Affiliation(s)
- Seemesh Bhaskar
- Nick Holonyak Jr. Micro and Nanotechnology Laboratory (HMNTL), University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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3
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Mishra P, Debnath AK, Dutta Choudhury S. Titanium nitride as an alternative and reusable plasmonic substrate for fluorescence coupling. Phys Chem Chem Phys 2022; 24:6256-6265. [PMID: 35229840 DOI: 10.1039/d1cp05822c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The development of alternative plasmonic materials that can replace gold and silver is of long-standing interest in materials research. In this study, we have prepared and characterized thin films of TiN, an emerging plasmonic material, and examined its effectiveness for fluorescence coupling in metal-dielectric structures having TiN as the plasmonically active component. We have used a combination of experiment and reflectivity calculations to determine the nature and dispersion of the optical modes sustained by the metal-dielectric structures, which furthermore are adjustable by varying the thickness of the dielectric layer. Our results reveal that fluorophores placed on the TiN substrates can couple with the surface-plasmon mode and/or the waveguide modes supported by these structures, to provide polarized and directional emission over narrow angular ranges. The performance of TiN substrates for surface plasmon-coupled emission (SPCE) and waveguide-coupled emission (WGCE) is found to be comparable with conventional Au substrates. Importantly, the TiN thin films are reusable, which is certainly advantageous for their use in SPCE or WGCE-based fluorescence sensing applications.
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Affiliation(s)
- Prabhat Mishra
- Materials Processing & Corrosion Engineering Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Anil K Debnath
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India.,Technical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Sharmistha Dutta Choudhury
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India.,Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
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4
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Rai B, Malmberg R, Srinivasan V, Ganesh KM, Kambhampati NSV, Andar A, Rao G, Sanjeevi CB, Venkatesan K, Ramamurthy SS. Surface Plasmon-Coupled Dual Emission Platform for Ultrafast Oxygen Monitoring after SARS-CoV-2 Infection. ACS Sens 2021; 6:4360-4368. [PMID: 34709037 DOI: 10.1021/acssensors.1c01665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The outbreak of the COVID-19 pandemic has had a major impact on the health and well-being of people with its long-term effect on lung function and oxygen uptake. In this work, we present a unique approach to augment the phosphorescence signal from phosphorescent gold(III) complexes based on a surface plasmon-coupled emission platform and use it for designing a ratiometric sensor with high sensitivity and ultrafast response time for monitoring oxygen uptake in SARS-CoV-2-recovered patients. Two monocyclometalated Au(III) complexes, one having exclusively phosphorescence emission (λPL = 578 nm) and the other having dual emission, fluorescence (λPL = 417 nm) and phosphorescence (λPL = 579 nm), were studied using the surface plasmon-coupled dual emission (SPCDE) platform for the first time, which showed 27-fold and 17-fold enhancements, respectively. The latter complex having the dual emission was then used for the fabrication of a ratiometric sensor for studying the oxygen quenching of phosphorescence emission with the fluorescence emission acting as an internal standard. Low-cost poly (methyl methacrylate) (PMMA) and biodegradable wood were used to fabricate the microfluidic chips for oxygen monitoring. The sensor showed a high sensitivity with a limit of detection ∼ 0.1%. Furthermore, real-time oxygen sensing was carried out and the response time of the sensor was calculated to be ∼0.2 s. The sensor chip was used for monitoring the oxygen uptake in SARS-CoV-2-recovered study participants, to assess their lung function post the viral infection.
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Affiliation(s)
- Bebeto Rai
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Robert Malmberg
- Department of Molecular Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Venkatesh Srinivasan
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Kalathur Mohan Ganesh
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Naga Sai Visweswar Kambhampati
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Abhay Andar
- Center for Advanced Sensor Technology, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
- Potomac Photonics Inc., BWTech Parkway South Campus, 1450 South Rolling Road, Baltimore, Maryland 20008, United States
| | - Govind Rao
- Center for Advanced Sensor Technology, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Carani B. Sanjeevi
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Koushik Venkatesan
- Department of Molecular Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
- MQ Photonics Research Centre, MQ Sustainable Research Centre, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
- Center for Advanced Sensor Technology, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
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5
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Su Q, Jiang C, Gou D, Long Y. Surface Plasmon-Assisted Fluorescence Enhancing and Quenching: From Theory to Application. ACS APPLIED BIO MATERIALS 2021; 4:4684-4705. [PMID: 35007020 DOI: 10.1021/acsabm.1c00320] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The integration of surface plasmon resonance and fluorescence yields a multiaspect improvement in surface fluorescence sensing and imaging, leading to a paradigm shift of surface plasmon-assisted fluorescence techniques, for example, surface plasmon enhanced field fluorescence spectroscopy, surface plasmon coupled emission (SPCE), and SPCE imaging. This Review aims to characterize the unique optical property with a common physical interpretation and diverse surface architecture-based measurements. The fundamental electromagnetic theory is employed to comprehensively unveil the fluorophore-surface plasmon interaction, and the associated surface-modification design is liberally highlighted to balance the surface plasmon-induced fluorescence-enhancement efforts and the surface plasmon-caused fluorescence-quenching effects. In particular, all types of surface structures, for example, silicon, carbon, protein, DNA, polymer, and multilayer, are systematically interrogated in terms of component, thickness, stiffness, and functionality. As a highly interdisciplinary and expanding field in physics, optics, chemistry, and surface chemistry, this Review could be of great interest to a broad readership, in particular, among physical chemists, analytical chemists, and in surface-based sensing and imaging studies.
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Affiliation(s)
- Qiang Su
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Carson International Cancer Center, Shenzhen University, 1066 Xueyuan Street, Nanshan District, Shenzhen 518055, Guangdong, China.,School of Chemistry, University of Birmingham, Edgbaston B15 2TT, Birmingham, United Kingdom
| | - Cheng Jiang
- Department of Chemistry, University of Oxford, Oxford OX1 3QZ, United Kingdom.,Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Deming Gou
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Carson International Cancer Center, Shenzhen University, 1066 Xueyuan Street, Nanshan District, Shenzhen 518055, Guangdong, China
| | - Yi Long
- Clinical Research Center, Southern University of Science and Technology Hospital, 6019 Liuxian Street, Xili Avenue, Nanshan District, Shenzhen 518055, Guangdong, China
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6
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Wang M, Wang M, Zheng G, Dai Z, Ma Y. Recent progress in sensing application of metal nanoarchitecture-enhanced fluorescence. NANOSCALE ADVANCES 2021; 3:2448-2465. [PMID: 36134167 PMCID: PMC9417471 DOI: 10.1039/d0na01050b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/13/2021] [Indexed: 05/21/2023]
Abstract
Fluorescence analytical methods, as real time and in situ analytical approaches to target analytes, can offer advantages of high sensitivity/selectivity, great versatility, non-invasive measurement and easy transmission over long distances. However, the conventional fluorescence assay still suffers from low specificity, insufficient sensitivity, poor reliability and false-positive responses. By exploiting various metal nanoarchitectures to manipulate fluorescence, both increased fluorescence quantum yield and improved photostability can be realized. This metal nanoarchitecture-enhanced fluorescence (MEF) phenomenon has been extensively studied and used in various sensors over the past years, which greatly improved their sensing performance. Thus in this review, we primarily give a general overview of MEF based sensors from mechanisms to state-of-the-art applications in environmental assays, biological/medical analysis and diagnosis areas. Finally, their pros and cons as well as further development directions are also discussed.
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Affiliation(s)
- Meiling Wang
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Min Wang
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Ganhong Zheng
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Zhenxiang Dai
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Yongqing Ma
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
- Institute of Physical Science and Information Technology, Anhui University Hefei 230039 China
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7
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Bhaskar S, Visweswar Kambhampati NS, Ganesh KM, P MS, Srinivasan V, Ramamurthy SS. Metal-Free, Graphene Oxide-Based Tunable Soliton and Plasmon Engineering for Biosensing Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:17046-17061. [PMID: 33788532 DOI: 10.1021/acsami.1c01024] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The quest for auxiliary plasmonic materials with lossless properties began in the past decade. In the current study, a unique plasmonic response is demonstrated from a stratified high refractive index (HRI)-graphene oxide (GO) and low refractive index (LRI)-polymethyl methacrylate (PMMA) multistack. Graphene oxide plasmon-coupled emission (GraPE) reveals the existence of strong surface states on the terminating layer of the photonic crystal (PC) framework. The chemical defects in GO thin film are conducive for unraveling plasmon hybridization within and across the multistack. We have achieved a unique assortment of metal-dielectric-metal (MDM) ensuing a zero-normal steering emission on account of solitons as well as directional GraPE. This has been theoretically established and experimentally demonstrated with a metal-free design. The angle-dependent reflectivity plots, electric field energy (EFI) profiles, and finite-difference time-domain (FDTD) analysis from the simulations strongly support plasmonic modes with giant Purcell factors (PFs). The architecture presented prospects for the replacement of metal-dependent MDM and surface plasmon-coupled emission (SPCE) technology with low cost, easy to fabricate, tunable soliton [graphene oxide plasmon-coupled soliton emission (GraSE)], and plasmon [GraPE] engineering for diverse biosensing applications. The superiority of the GraPE platform for achieving 1.95 pg mL-1 limit of detection of human IFN-γ is validated experimentally. A variety of nanoparticles encompassing metals, intermetallics, rare-earth, and low-dimensional carbon-plasmonic hybrids were used to comprehend PF and cavity hot-spot contribution resulting in 900-fold fluorescence emission enhancements on a lossless substrate, thereby opening the door to unique light-matter interactions for next-gen plasmonic and biomedical technologies.
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Affiliation(s)
- Seemesh Bhaskar
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Naga Sai Visweswar Kambhampati
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - K M Ganesh
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Mahesh Sharma P
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Venkatesh Srinivasan
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
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8
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Rai B, Sarma PV, Srinivasan V, Shaijumon MM, Ramamurthy SS. Engineering of Exciton-Plasmon Coupling Using 2D-WS 2 Nanosheets for 1000-Fold Fluorescence Enhancement in Surface Plasmon-Coupled Emission Platforms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1954-1960. [PMID: 33494607 DOI: 10.1021/acs.langmuir.0c03465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Enhancement of fluorescence emission from single-photon quantum emitters on plasmonic nanomaterials using surface plasmon-coupled emission (SPCE) platforms has seen significant advancements. In parallel, there has also been an exponential rise in applications involving two-dimensional (2D) transition-metal dichalcogenides (TMDs) that exhibit unique exciton-plasmon interactions. Although both these Frontier research areas have impacted the development of sensor and sensing technologies, no study coalesces these two arenas for translational applications. In this work, we use thin WS2 nanosheets for realizing 1000-fold fluorescence enhancement on the SPCE platform. Structure-dependent fluorescence enhancement exhibited by WS2 provides new insight into the use of TMDs and exciton-plasmon coupling in SPCE substrates. Cellphone-based detection of the emitting dipole is another unique aspect of this work that presents a low-cost alternative in comparison with high-end detectors.
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Affiliation(s)
- Bebeto Rai
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Prasad V Sarma
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala PO, Thiruvananthapuram, Kerala 695551, India
| | - Venkatesh Srinivasan
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Manikoth M Shaijumon
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala PO, Thiruvananthapuram, Kerala 695551, India
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
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9
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Bhaskar S, Singh AK, Das P, Jana P, Kanvah S, Bhaktha B N S, Ramamurthy SS. Superior Resonant Nanocavities Engineering on the Photonic Crystal-Coupled Emission Platform for the Detection of Femtomolar Iodide and Zeptomolar Cortisol. ACS APPLIED MATERIALS & INTERFACES 2020; 12:34323-34336. [PMID: 32597162 DOI: 10.1021/acsami.0c07515] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Although luminescence spectroscopy has been a promising sensing technology with widespread applications in point-of-care diagnostics and chem-bio detection, it fundamentally suffers from low signal collection efficiency, considerable background noise, poor photostability, and intrinsic omnidirectional emission properties. In this regard, surface plasmon-coupled emission, a versatile plasmon-enhanced detection platform with >50% signal collection efficiency, high directionality, and polarization has previously been explored to amplify the limit of detection of desired analytes. However, high Ohmic loss in metal-dependent plasmonic platforms has remained an inevitable challenge. Here, we develop a hybrid nanocavity interface on a template-free and loss-less photonic crystal-coupled emission (PCCE) platform by the quintessential integration of high refractive index dielectric Nd2O3 "Huygens sources" and sharp-edged silver nanoprisms (NPrs). While efficient forward light scattering characteristics of Nd2O3 nanorods (NRs) present 460-fold emission enhancements in PCCE, the tunable localized plasmon resonances of NPrs display high electromagnetic field confinement at sharp nanotips and protrusions, boosting the enhancements 947-fold. The judicious use of silver NPr (AgNPr) metal-Nd2O3 dielectric hybrid resonances in conjugation with surface-trapped Bloch surface waves of the one-dimensional photonic crystal (1DPhC) displayed unprecedented >1300-fold enhancements. The experimental results are validated by excellent correlations with numerical calculations. The multifold hotspots generated by zero and nonzero nanogaps between the coassembly of NPrs, NRs, and 1DPhCs are used for (i) determination of hyper and hypothyroidism levels through monitoring the concentration of iodide (I-) ions and (ii) single-molecule detection (zeptomolar) of the stress hormone, cortisol, through the synthesized cortisol-rhodamine B conjugate obtained using a simple esterification reaction.
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Affiliation(s)
- Seemesh Bhaskar
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Adarsh Kumar Singh
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
| | - Pratyusha Das
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Palash Jana
- Department of Chemistry, Indian Institute of Technology, Gandhinagar 382355, India
| | - Sriram Kanvah
- Department of Chemistry, Indian Institute of Technology, Gandhinagar 382355, India
| | - Shivakiran Bhaktha B N
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh 515134, India
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10
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Pan XH, Cao SH, Chen M, Zhai YY, Xu ZQ, Ren B, Li YQ. In situ and sensitive monitoring of configuration-switching involved dynamic adsorption by surface plasmon-coupled directional enhanced Raman scattering. Phys Chem Chem Phys 2020; 22:12624-12629. [PMID: 32458946 DOI: 10.1039/d0cp01567a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Surface adsorption studies play a crucial role in numerous fields from surface catalysis to molecular separation. However, investigation on adsorption mechanisms has been restricted to limited analytes and approaches, which calls for an in situ and sensitive surface analysis technique capable of revealing the mechanisms as well as discriminating different adsorbates and their geometry at different adsorption stages. In this study, we employed surface plasmon-coupled directional enhanced Raman scattering (SPCR), a novel technique developed by coupling surface plasmon-coupled emission with SERS, to study conformation-switching involved dynamic adsorption with background suppression and improved sensitivity (nearly 30-fold). We obtained the isotherms for a conformation-changing Raman model analyte, malachite green. An S-type Langmuir model was fitted from the time-resolved SPCR signals sensitively and without any interference from the bulk solution. The reorientation of the analyte from a predominantly parallel configuration to a perpendicular one was captured by the dramatic increase in the intensity ratios of the adsorption-related peaks to the adsorption-unrelated peak. We believe that this new sensitive and selective SPCR technique will be a promising tool for surface adsorption kinetics analysis.
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Affiliation(s)
- Xiao-Hui Pan
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
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Bhaskar S, Kowshik NCSS, Chandran SP, Ramamurthy SS. Femtomolar Detection of Spermidine Using Au Decorated SiO 2 Nanohybrid on Plasmon-Coupled Extended Cavity Nanointerface: A Smartphone-Based Fluorescence Dequenching Approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2865-2876. [PMID: 32159962 DOI: 10.1021/acs.langmuir.9b03869] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Coupling of photons with molecular emitters in different nanocavities have resulted in transformative plasmonic applications. The rapidly expanding field of surface plasmon-coupled emission (SPCE) has synergistically employed subwavelength optical properties of localized surface plasmon resonance (LSPR) supported by nanoparticles (NPs) and propagating surface plasmon polaritons assisted by metal thin films for diagnostic and point-of-care analysis. Gold nanoparticles (AuNPs) significantly quench the molecular emission from fluorescent molecules (at close distances <5 nm). More often, complex strategies are employed for providing a spacer layer around the AuNPs to avoid direct contact with fluorescent molecules, thereby preventing quenching. In this study we demonstrate a rapid and facile strategy with the use of Au-decorated SiO2 NPs (AuSil), a metal (Au)-dielectric (SiO2) hybrid material for dequenching the otherwise quenched fluorescence emission from radiating dipoles and to realize 88-fold enhancement using the SPCE platform. Different loading of AuNPs were studied to tailor fluorescence emission enhancements in spacer, cavity, and extended (ext.) cavity nanointerfaces. We also present femtomolar detection of spermidine using this nanohybrid in a highly desirable ext. cavity interface. This interface serves as an efficient coupling configuration with dual benefits of spacer and cavity architectures that has been widely explored hitherto. The multifold hot-spots rendered by the AuSil nanohybrids assist in augmented electromagnetic (EM)-field intensity that can be captured using a smartphone-based SPCE platform presenting excellent reliability and reproducibility in spermidine detection.
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Affiliation(s)
- Seemesh Bhaskar
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh India, 515134
| | - N Charan S S Kowshik
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh India, 515134
| | - S Prathap Chandran
- Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh India, 515134
| | - Sai Sathish Ramamurthy
- STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh India, 515134
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12
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Ren W, Chen S, Li S, Zhang Y, Liu J, Guan M, Yang H, Li N, Han C, Li T, Zhao Z, Ge J. Photoluminescence Enhancement of Carbon Dots by Surfactants at Room Temperature. Chemistry 2018; 24:15806-15811. [DOI: 10.1002/chem.201804436] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Wei Ren
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Shiqing Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and CityU-CAS Joint Laboratory of Functional Materials and Devices; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Shumu Li
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
| | - Yangyang Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Jianan Liu
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
| | - Ming Guan
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Hui Yang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Na Li
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Chao Han
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Tuo Li
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Zhenwen Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems; Institute of Chemistry, Chinese Academy of Sciences, Beijing Mass Spectrum Center; Beijing 100190 P. R. China
- Graduate School; University of Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Jiechao Ge
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and CityU-CAS Joint Laboratory of Functional Materials and Devices; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences; Beijing 100190 P. R. China
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13
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Ag-protein plasmonic architectures for surface plasmon-coupled emission enhancements and Fabry-Perot mode-coupled directional fluorescence emission. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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14
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Badiya PK, Srinivasan V, Jayakumar TP, Ramamurthy SS. Ag-CNT Architectures for Attomolar Dopamine Detection and 100-Fold Fluorescence Enhancements with Cellphone-Based Surface Plasmon-Coupled Emission Platform. Chemphyschem 2016; 17:2791-4. [PMID: 27338187 DOI: 10.1002/cphc.201600571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Indexed: 11/07/2022]
Abstract
We report cellphone-based detection of dopamine with attomolar sensitivity in clinical samples with the use of a surface plasmon-coupled emission (SPCE) platform. To this end, silver-coated carbon nanotubes were used as spacer and cavity materials on SPCE substrates to obtain up to 100-fold fluorescence enhancements. The presence of silver on the carbon nanotubes helped to overcome fluorescence quenching arising due to π-π interactions between the carbon nanotube and rhodamine 6G. The competing adsorption of dopamine versus rhodamine 6G on graphene oxide was utilized to develop this sensing platform.
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Affiliation(s)
- Pradeep Kumar Badiya
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, 515134, India
| | - Venkatesh Srinivasan
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, 515134, India
| | - Tejkiran Pindi Jayakumar
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, 515134, India
| | - Sai Sathish Ramamurthy
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, 515134, India.
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15
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Srinivasan V, Manne AK, Patnaik SG, Ramamurthy SS. Cellphone Monitoring of Multi-Qubit Emission Enhancements from Pd-Carbon Plasmonic Nanocavities in Tunable Coupling Regimes with Attomolar Sensitivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:23281-8. [PMID: 27529116 DOI: 10.1021/acsami.6b07445] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We demonstrate for the first time the tuning of qubit emission based on cavity engineering on plasmonic silver thin films. This tunable transition from weak to strong coupling regime in plasmon-coupled fluorescence platform was achieved with the use of palladium nanocomposites. In addition to our recently established correlation between Purcell factor and surface plasmon-coupled emission enhancements, we now show that the qubit-cavity environment experiences the Purcell effect, Casimir force, internal fano resonance, and Rabi splitting. Finite-difference time-domain simulations and time correlated single photon counting studies helped probe the molecular structure of the radiating dipole, rhodamine-6G, in palladium-based nanocavities. The sensitivity of the qubit-cavity mode helped attain a DNA detection limit of 1 aM (attomolar) and multianalyte sensing at picomolar concentration with the use of a smartphone camera and CIE color space. We believe that this low-cost technology will lay the groundwork for mobile phone-based next-gen plasmonic sensing devices.
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Affiliation(s)
- Venkatesh Srinivasan
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh, India 515134
| | - Anupam Kumar Manne
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh, India 515134
| | - Sai Gourang Patnaik
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh, India 515134
| | - Sai Sathish Ramamurthy
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam, Puttaparthi, Anantapur, Andhra Pradesh, India 515134
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16
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Srinivasan V, Vernekar D, Jaiswal G, Jagadeesan D, Ramamurthy SS. Earth Abundant Iron-Rich N-Doped Graphene Based Spacer and Cavity Materials for Surface Plasmon-Coupled Emission Enhancements. ACS APPLIED MATERIALS & INTERFACES 2016; 8:12324-9. [PMID: 27128348 DOI: 10.1021/acsami.5b12038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We demonstrate for the first time the use of Fe-based nanoparticles on N-doped graphene as spacer and cavity materials and study their plasmonic effect on the spontaneous emission of a radiating dipole. Fe-C-MF was produced by pyrolizing FeOOH and melamine formaldehyde precursor on graphene, while Fe-C-PH was produced by pyrolizing the Fe-phenanthroline complex on graphene. The use of the Fe-C-MF composite consisting of Fe-rich crystalline phases supported on N-doped graphene presented a spacer material with 116-fold fluorescence enhancements. On the other hand, the Fe-C-PH/Ag based cavity resulted in an 82-fold enhancement in Surface Plasmon-Coupled Emission (SPCE), with high directionality and polarization of Rhodamine 6G (Rh6G) emission owing to Casimir and Purcell effects. The use of a mobile phone as a cost-effective fluorescence detection device in the present work opens up a flexible perspective for the study of different nanomaterials as tunable substrates in cavity mode and spacer applications.
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Affiliation(s)
- Venkatesh Srinivasan
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam Campus, Anantapur, Andhra Pradesh, India 515134
| | | | | | | | - Sai Sathish Ramamurthy
- Plasmonics Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning , Prasanthi Nilayam Campus, Anantapur, Andhra Pradesh, India 515134
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17
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S. V, Badiya PK, Ramamurthy SS. Purcell factor based understanding of enhancements in surface plasmon-coupled emission with DNA architectures. Phys Chem Chem Phys 2016; 18:681-4. [DOI: 10.1039/c5cp05410a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tuning the Purcell factor with DNA architectures to realize >130-fold fluorescence enhancements in surface plasmon-coupled emission.
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Affiliation(s)
- Venkatesh S.
- Plasmonics Laboratory
- Department of Chemistry
- Sri Sathya Sai Institute of Higher Learning
- Prasanthi Nilayam Campus
- Anantapur
| | - Pradeep Kumar Badiya
- Plasmonics Laboratory
- Department of Chemistry
- Sri Sathya Sai Institute of Higher Learning
- Prasanthi Nilayam Campus
- Anantapur
| | - Sai Sathish Ramamurthy
- Plasmonics Laboratory
- Department of Chemistry
- Sri Sathya Sai Institute of Higher Learning
- Prasanthi Nilayam Campus
- Anantapur
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