Dr. Siva Kumar Krishnan

Investigador de Cathedra CONACyT
Instituto de Física "Ing. Luis Rivera Terrazas“
Benemérita Universidad Autónoma de Puebla (BUAP), Mexico.

   

Education

Post doc-2017

UNAM, Mexico.

PhD-2015

Nanoscience and Nanotechnology
CINVESTAV-Mexico.

M. Tech (MS)-2010

Nanoscience and Nanotechnology
Anna University, Chennai, India.

BSc, MSc in Physics-2008

Bharathiyar University, CBE, India.

Awards & honors:

  • CONACyT fellowship, Mexico (2010-2014).
  • DGAPA Post-doctoral fellowship (2015-2017)
  • System of national research council (SNI)- Level I in Level III.
  • Cathedra of CONACYT position in CONACYT, Mexico.
  • Carl Storm International Diversity (CSID) fellowship at GRC, USA.
  • Secured school 3rd in 10th board exam.

Professional Activities:

  • Reviewer of peer review journals (Chemistry of Materials, ACS sustainable chemistry and Engineering, ACS Applied Energy materials, ACS Omega).
  • Organizing committee member in international conferences at IFUAP, BUAP, Mexico.
  • Teaching courses for post graduate and graduate students at BUAP, Mexico.

Our Research

Generally, my research interests are focused on development of new catalysts based on bi/multi-metallic nanocrystals and metal nanoparticles supported metal oxides for catalysis and energy storge applications. This involves the development of new synthetic routes such as seed-mediated chemical growth of bi/multimetallic core-shell nanocrystals, and green synthesis of NPs supported mesoporous metal oxide nanostructures using deep eutectic solvents (DESs) and their structure, morphological, and interface properties using advanced characterization techniques. We are also study synthesis of perovskite nanocrystals and their optoelectronic properties for solar cells applications as well as highly flexible and low-cost SERS substrates for detection of biomolecules such as virus and disease related biomarkers.

Heterogenious catalysis

Bimetallic/multi metallic nanocrystals (NCs) have recently emerged as a unique class of catalytic materials, which enabled substantially reduce the Pt-utilization, and remarkably high catalytic efficiencies. Our group focuses on development of novel synthetic routes for size, and shape controlled synthesis of bi/multi metallic core-shell NCs ( e.g. Pd@Au, Pd@Pt, Pd@AuCu, Pd@AuNi, and Ag@PtNi core-shell nanocubes , octahedra NCs) with controlled shell thickness. We are trying to understand the effect of surface strain, atomic defects through HAADF-STEM imaging techniques and their influence towards catalytic properties.

Metal NPs supported metal oxides (nanocomposite) have attracted as a potential inexpensive electrocatalysts with increased efficiency and durability. Our work focuses on synthesis of monodisperse metal NPs (Pt, Pd, Au and bimetallic AuNi, and PdSn) are uniformly supported onto metal oxide support (SiO2,TiO2, CeO2) as a model catalysts, and understanding how selectively and catalytic efficiency tuning by tailoring the NPs size, interface between metal/metal oxides for alcohol oxidations, oxygen reduction reactions (ORR), and CO2 reductions. We also study supporting single atoms (Au and Pd) onto metal oxide support as an advanced electrocatalysts.

Energy storage and conversion
A significant amount of battery research and development have been made recent years, both in academic and industry, to meet the demand for electric vehicle applications. When it comes to designing and fabricating electrode materials, nanotechnology-based approaches have demonstrated numerous benefits for improved energy and power density, cyclability and safety. In our lab, we focuses on preparation of efficient anode materials using metal oxides and sulfiedes ( e.g., Cu2O, V2O5 and NiS2, ZnS) and doping variety of metal cations (Mo4+/6+, Co2+, Li2+) via ionic liquid (DES)-assisted hydrothermal technique as efficient anodes for fast charging, long-life lithium ion batteries (LIBs).
Healthcare monitoring
Surface-enhanced Raman spectroscopy (SERS) has recently emerged as an powerful spectroscopy technique that can allow detection and monitoring of biomolecules and therapeutic drug down to single molecular level. Over the past few years, we develop the SERS substrates based on Ag and Au nanostructures, and flexible substrate based on Ag, Au NPs supported on metal oxide (SiO2 multilayer crystals) over polyethylene naphthalate (PEN or filter paper substrates for therapeutic-drug monitoring and early detection of virus including recently emerging SARS-CoV-2 virus.

Controlled synthesis nanoscale metal and metal oxides

Controlled self-assembly of bimetallic NPs films

Controlled self-assembly of opal based 3D cystals

Recent Publications

2022

Molybdenum-Doped Nickel Disulfide (NiS2:Mo) Microspheres as an Active Anode Material for High-Performance Durable Lithium-Ion Batteries

U. Pal; P. S. Murphin Kumar; V. Ponnusamy; H-il Kim; M. A. Hernández and S.Kumar Krishnan. ACS Appl. Energy Mater. Pp.11-12, 2022.

Graphene-Based Field-Effect Transistors in Biosensing and Neural interfacing Applications: Recent Advances and prospects. Anal. Chem (Under review)

Siva Kumar Krishnan,  Nandhini Nataraj, M. Meyyappan, and Umapada Pal.  Anal Chem

Under review

An Efficient and Durable Electrocatalyst based on Strongly Coupled Pt Nanoparticles on CeO2 Microspheres for CO- resilient Methanol Oxidation

Paskalis Sahaya Murphin Kumar, Arulmani Subramanian ׀׀Hyoung-il Kim, Deepthi Koolath Ramakrishnan, Vinothkumar Ponnusamy, Umapada Pal, Siva Kumar Krishnan   J. Phys. Chem. C 

Final revision

Strontium Vanadate-Supported Graphitic Carbon Nitride Nanocomposite for Simultaneous Voltametric Determination of Acetaminophen and Levofloxacin in Complex Biological Samples

Nandini Nataraj, Shen-Ming Chen, Siva Kumar Krishnan, Environ. Sci.: Nano, 2022

Just accepted

Current Lab Members

Siva Kumar

EM-1, IFUAP, BUAP

Researcher

Andrés Guzmán Cruz

IFUAP, BUAP

PhD Candidate

Rafael Villamil Carreon

FCFM, BUAP

PhD Candidate

Hugo Avalos Sánchez

FCFM, BUAP

PhD Candidate

Lab News