Watanabe

Authors: Camelia Berghian-Grosan, Teodora Radu, Alexandru R. Biris, Monica Dan, Cezara Voica, Fumiya Watanabe, Alexandru S. Biris, Adriana Vulcua Publication: Journal of Energy Chemistry, Volume 40, January 2020, Pages 81-88 Abstract: Platinum catalysts play a major role in the large scale commercialization of direct methanol fuel cells (DMFC). Here, we present a procedure to create a nanostructural graphene-platinum (GrPt) composite containing a … Platinum Nanoparticles Coated by Graphene Layers: A Low-Metal Loading Catalyst for Methanol Oxidation in Alkaline Media

Authors: Fumiya Watanabe, Zeid A. Nima, Takumi Honda, Masatoshi Mitsuhara, Minoru Nishida, and Alexandru S. Biris Publication: Nanotechnology, Volume 28, Number 2, doi:10.1088/1361-6528/28/2/025704 Abstract: Multicomponent nano-agents were designed and built via a core–shell approach to enhance their surface enhanced Raman scattering (SERS) signals. These nano-agents had 36 nm × 12 nm gold nanorod cores coated by 4 nm thick silver shell films and a subsequent thin bifunctional thiolated … X-ray Photoelectron Spectroscopy and Transmission Electron Microscopy analysis of silver-coated gold nanorods designed for bionanotechnology applications

Authors: Stela Pruneanu, Alexandru R. Biris, Florina Pogacean, Crina Socaci, Maria Coros, Marcela Rosu, Fumiya Watanabe, and Alexandru S. Biris Publication: Electrochimica Acta, Volume 154 Abstract: In this paper, we report on the preparation of gold electrodes modified with graphene-AuAg (Au/Gr-AuAg) or graphene-Au (Au/Gr-Au) composite materials as electrochemical sensors for dopamine (DA) detection. The response of the … The Influence of Uric and Ascorbic Acid on the Electrochemical Detection of Dopamine Using Graphene-modified Electrodes

Authors: Zeid A. Nima, Mohamed H. Lahiani, Fumiya Watanabe,  Yang Xu, Mariya V. Khodakovskaya, and  Alexandru S. Biris Publication: RSC Advances, Issue 4 Abstract: Multifunctional, plasmonically-active nanorods based on gold cores and silver shells (AuNR/Ag), after exposure to tomato plants, were found to be taken up in rather short times, being detected by SERS in both roots … Plasmonically Active Nanorods for Delivery of Bio-active Agents and High-Sensitivity SERS Detection in planta

Authors: Yashraj Gartia, Charlette M. Felton, Fumiya Watanabe, Peter Szwedo, Alexandru S. Biris, Nandan Kumar Peddi, Zeid A. Nima, and Anindya Ghosh Publication: ACS Sustainable Chemistry and Engineering, Issue 3, Volume 1 Abstract: A nanocomposite of a dichloro-amido-macrocyclic cobalt(III) complex (1) and graphene was developed and characterized using various microscopic and spectroscopic techniques such as X-ray photoelectron spectroscopy, transmission … Graphene-Enhanced Oxygen Reduction by MN4 Type Cobalt (III) Catalyst

Authors: Omar Abdulrazzaq, Shawn Bourdo, Viney Saini, Fumiya Watanabe, Bailey Barnes, Anindya Ghosh, and Alexandru S. Biris Publication: RSC Advances, Issue 5 Abstract: In this work, we present the first demonstration of tuning the work function of polyaniline by controlling the concentration level of camphorsulfonic acid as a protonic acid dopant and m-cresol as a solvent. Optical, … Tuning the Work Function of Polyaniline via Camphorsulfonic Acid: An X-ray Photoelectron Spectroscopy Investigation

Authors: Stela Pruneanu, Alexandru R. Biris, Florina Pogacean, Maria Coros, Ganesh K. Kannarpady, Fumiya Watanabe, and Alexandru S. Biris Publication: Electrochimica Acta, Volume 139 Abstract: Composite materials based on graphene and platinum nanoparticles (Gr-Pt-2 and Gr-Pt-3) were synthesized over two catalysts (Ptx/MgO, where x = 2 or 3 wt.%) using radio-frequency catalytic chemical vapor deposition (RF-CCVD), with methane as carbon … The Study of Adenine and Guanine Electrochemical Oxidation Using Electrodes Modified with Graphene-platinum Nanoparticles Composites

Authors: Zeid A. Nima, Meena Mahmood, Yang Xu, Thikra Mustafa, Fumiya Watanabe, Dmitry A. Nedosekin, Mazen A. Juratli, Tariq Fahmi, Ekaterina I. Galanzha, John P. Nolan, Alexei G. Basnakian, Vladimir P. Zharov, and Alexandru S. Biris Publication: Scientific Reports, Volume 4 Abstract: Nanotechnology has been extensively explored for cancer diagnostics. However, the specificity of current methods to … Circulating Tumor Cells Identification by Functionalized Silver-Gold Nanorods with Multicolor, Super-Enhanced SERS and Photothermal Resonances