Sankar Ganesh Ramaraj 교수

Doping plays a significant role in affecting the physical and chemical properties of two-dimensional (2D) dichalcogenide materials. Controllable doping is one of the major factors in the modification of the electronic and mechanical properties of 2D materials. MoS₂ 2D materials have gained significant attention in gas sensing owing to their high surface-to-volume ratio. However, low response and recovery time hinder their application in practical gas sensors. Herein, we report the enh

With advancements in photonic technologies, photonic crystal fibers (PCFs) have become crucial components in developing highly sensitive and efficient biosensors. This paper presents an optimized bowtie-shaped PCF biosensor that leverages surface plasmon resonance (SPR) phenomena for enhanced refractive index (RI) sensing. The proposed design uses an external sensing mechanism to effectively characterize performance across an RI range of 1.32 to 1.44. Fabrication is simplified by selecting a lar

We present a novel and straightforward design for a photonic crystal fiber (PCF)-based surface plasmon resonance sensor suitable for a wide range of sensing applications. The sensor’s performance is numerically analyzed using the finite element method implemented in COMSOL Multiphysics software. Our numerical results demonstrate a wavelength sensitivity(WS) of 88,000 nm/RIU and an amplitude sensitivity(AS) of 3136 RIU–1, with a resolution of 1.136 × 10–6 RIU. The proposed sensor is capable of de

This study introduces an innovative photonic crystal fiber (PCF) surface plasmon resonance (SPR) biosensor, notable for its sophisticated design and exceptional performance, utilizing gold as the plasmonic material. The sensor offers an expanded detection range and outstanding sensitivity, operating within a refractive index range of 1.27 to 1.43. It achieves a remarkable wavelength sensitivity of 157,000 nm/RIU with a resolution of 6.37 × 10⁻⁷ RIU and an amplitude sensitivity of 1263 RIU⁻¹ with

Electronic waste (e-waste) has become a significant environmental and societal challenge, necessitating the development of sustainable alternatives. Biocompatible and biodegradable electronic devices offer a promising solution to mitigate e-waste and provide viable alternatives for various applications, including triboelectric nanogenerators (TENGs). This review provides a comprehensive overview of recent advancements in biocompatible, biodegradable, and implantable TENGs, emphasizing their pote

This study represents a new design for an empathetic surface plasmon resonance (SPR) sensor that utilizes BlueP/TMDCs and BaTiO 3 (barium titanate) and employs the angular interrogation technique to measure the glucose concentration level in urine samples. This design optimization involved extensive numerical analysis through the use of the Transfer Matrix Method (TMM) at a visible wavelength of λ=633 nm to enhance sensitivity, full width half maximum (FWHM), detection accuracy (DA), and quality

Abstract Reactant solubility, which dictates achievable concentrations, and the stability of reaction intermediates (excited states), solvents modulate the potential energy landscape and influence reaction rates. Consequently, solvent selection is pivotal in optimizing process productivity, economic feasibility, and environmental footprint. At present, organic synthesis pivots around the idea of sustainability. In particular, PEG‐400, a popular solvent and phase transfer catalyst, is considered

Abstract Semiconducting materials are pivotal in various fields, such as solar cells, LEDs, photovoltaic cells, etc. A nature‐friendly chitosan is a good film‐forming, water‐soluble polymer that is modified to a small band‐gap polymer for various optoelectronic applications. Choline chloride:ethylene glycol:glycerin (1:1:1) deep eutectic solvent (DES)‐modified activated carbon is incorporated into the chitosan matric and this composite is fabricated into thin films via spin coating methodology.

• SAW gas sensors can detect ultra-low concentrations of gaseous compounds, benefiting environmental monitoring, industrial safety, and healthcare. • Recent progress in the incorporation of nanomaterials such as ZnO, graphene oxide, and metal–organic frameworks has been discussed. • The adoption of wireless technology has expanded the application of SAW sensors in remote and real-time monitoring. • SAW biosensors enable non-invasive diagnostics, playing a crucial role in medical and healthcare a

Abstract This study investigates the synthesis, analysis, and utility of films comprising deep eutectic solvent (DES) grafted activated charcoal (AC) within a polyvinyl alcohol (PVA) matrix for optoelectronic device applications. The fabrication process involves the dispersion of DES functionalization AC into the PVA solution, followed by casting onto substrates with controlled drying. Comprehensive characterization encompassing X‐ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis