Krishna Sampathkumar

ORCID: 0000-0002-7479-7572
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About
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Research Areas
  • Graphene research and applications
  • Advanced Materials and Mechanics
  • Advanced Sensor and Energy Harvesting Materials
  • Surface and Thin Film Phenomena
  • Nonlinear Optical Materials Research
  • Force Microscopy Techniques and Applications
  • Mechanical and Optical Resonators
  • Thermal and Kinetic Analysis
  • Boron and Carbon Nanomaterials Research
  • Nanowire Synthesis and Applications
  • Advancements in Semiconductor Devices and Circuit Design
  • 2D Materials and Applications
  • Strong Light-Matter Interactions
  • Semiconductor materials and interfaces
  • Electronic and Structural Properties of Oxides
  • Photorefractive and Nonlinear Optics
  • Date Palm Research Studies
  • Coconut Research and Applications
  • Hydrogels: synthesis, properties, applications
  • Carbon Nanotubes in Composites
  • Advanced Physical and Chemical Molecular Interactions
  • Nanomaterials and Printing Technologies
  • Molecular Junctions and Nanostructures
  • Diamond and Carbon-based Materials Research
  • Nonlinear Optical Materials Studies

Central European Institute of Technology
2019-2023

Brno University of Technology
2019-2023

Tamil Nadu Agricultural University
2023

Radboud University Nijmegen
2023

Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2017-2021

Multilayered graphitic materials are not suitable as load-bearers due to their inherent weak interlayer bonding (for example, graphite is a solid lubricant in certain applications). This situation largely improved when two-dimensional (2-D) such monolayer (SLG) graphene employed. The downside these cases the presence of thermally or mechanically induced wrinkles which ubiquitous 2-D materials. Here we set out examine effect extensive large wavelength/ amplitude wrinkling on stress transfer...

10.1021/acsami.7b07547 article EN ACS Applied Materials & Interfaces 2017-07-19

CoPS3 stands out in the family of van der Waals antiferromagnets XPS3 (X=Mn, Ni, Fe, Co) due to unquenched orbital momentum magnetic Co2+ ions which is known facilitate coupling spins both electromagnetic waves and lattice vibrations. Here, using a time-resolved magneto-optical pump-probe technique we experimentally study ultrafast laser-induced dynamics mutually correlated lattice. It shown that femtosecond laser pulse acts as an heater thus results melting antiferromagnetic order. At same...

10.1063/5.0146128 article EN cc-by APL Materials 2023-07-01

Abstract Recent advancements in isolation and stacking of layered van der Waals materials have created an unprecedented paradigm for demonstrating varieties 2D quantum materials. Rationally designed heterostructures composed monolayer transition‐metal dichalcogenides (TMDs) few‐layer hBN show several unique optoelectronic features driven by correlations. However, entangled superradiant excitonic species such systems not been observed before. In this report, it is demonstrated that strong...

10.1002/adfm.202102196 article EN Advanced Functional Materials 2021-05-12

Raman spectroscopy is undoubtedly the most frequently used technique for universal characterization of graphene and related materials. Quantification parameters like disorder or strain possible through analysis particular bands. However, under certain conditions, such evaluation can be jeopardized by—sometimes hidden—convolution more overlapping effects. In this work, functionalization by common nitrobenzenediazonium salt simultaneous biaxial tensile deformation induced substrate swelling...

10.1021/acs.jpcc.9b06516 article EN The Journal of Physical Chemistry C 2019-08-15

Interfacing of materials with different dimensionalities becomes increasingly relevant for many applications which can utilize the exceptional properties low‐dimensional on one hand, and build‐up existing production know‐how bulk (3D) other. Numerous appealing possibilities are offered by such combinations. In this work, authors focus 2D–3D heterostructures composed mechanically exfoliated single‐ few‐layer layer graphene (Gr) coupled to freshly etched n‐doped silicon. Two ways...

10.1002/pssb.201800305 article EN physica status solidi (b) 2018-09-21

Suspended membranes of two-dimensional (2D) materials are interest for many applications. Much their characterization relies on scanning probe microscopy (SPM) techniques such as atomic force (AFM) or tunneling (STM). Unlike rigid samples, the suspended atomically thin 2D are, however, flexible and do not remain mechanically undisturbed during SPM measurements. Local deformations can occur at location tip thus result in measurements that misrepresent actual membrane topography nanomechanical...

10.1063/5.0040522 article EN cc-by Applied Physics Letters 2021-03-08

Coconut palms are one of the most significant crops in tropical countries, supplying food and a living for millions. trees, on other hand, subject to variety diseases that can severely diminish yield even cause mortality. Deep learning approaches have yielded promising achievements field picture recognition classification recent years. In this study, deep learning-based approach is proposed identifying coconut tree diseases. Based photographs leaves, system conceived developed automatically...

10.1109/icpcsn58827.2023.00110 article EN 2023-06-01

CoPS3 stands out in the family of van der Waals antiferromagnets XPS3 (X=Mn, Ni, Fe, Co) due to unquenched orbital momentum magnetic Co2+ ions which is known facilitate coupling spins both electromagnetic waves and lattice vibrations. Here, using a time-resolved magneto-optical pump-probe technique we experimentally study ultrafast laser-induced dynamics mutually correlated lattice. It shown that femtosecond laser pulse acts as an heater thus results melting antiferromagnetic order. At same...

10.48550/arxiv.2302.12104 preprint EN cc-by arXiv (Cornell University) 2023-01-01

The rise of nanomaterials requires a day-to-day implementation suitable nanoscale characterization techniques. Atomic force microscopy (AFM) has become such one, capable providing diverse information about the sample topography, mechanical and electrical properties with resolution down to few nanometers. work by Otakar Frank co-workers (article no. 1800305) shows two examples AFM application describe local photovoltaic graphene–silicon Schottky junctions. Direct measurement I–V curves at...

10.1002/pssb.201870144 article EN physica status solidi (b) 2018-12-01

2D layered materials promise to revolutionize the field of electronics, photonics, optoelectronics, energy storage, and sensing, etc. have exceptional mechanical properties, with critical elongation >10%.Employing strain manipulate electronic structure these could lead further improvement their implementation in many aspects.The ease manipulation can be one factors for utilization photonic devices.Apart from strain, which decreases (increases) bandgap at rate ~100 meV under 1% biaxial...

10.37904/nanocon.2020.3685 article EN cc-by NANOCOM ... 2020-01-01
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