S. Akhter

Aligarh Muslim University

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Co-Authors

L. Fields

University of Notre Dame

V. Ansari

Aligarh Muslim University

B. Yaeggy

University of Cincinnati

R. Fine

Los Alamos National Laboratory

K. S. McFarland

University of Rochester

J. K. Nelson

William & Mary

R. Gran

University of Minnesota, Duluth

Ana Lozano

Instituto de Física Fundamental

M. A. Ramírez

California University of Pennsylvania

M. V. Ascencio

Pontifical Catholic University of Peru

Cooperative Institutions

Minerva Foundation

University of Rochester

Fermi National Accelerator Laboratory

Oregon State University

Williams (United States)

William & Mary

Aligarh Muslim University

Argonne National Laboratory

Universidad de Guanajuato

University of Minnesota

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Tunable synthesis of platinum nanoparticles by EtOH reduction in presence of poly (vinylpyrrolidone)

Bangladesh Journal of Scientific and Industrial Research (2015)

MS Rahman S. Akhter KN Ahmed MS Rahman RK Saha

Monodispersed platinum nanoparticles (Pt-NPs) with an average diameter dTEM 3.1±1.0 nm were synthesized by EtOH reduction method in the presence of an organic polymer poly (vinylpyrrolidone) (PVP) with an average molecular weight of 40,000. Using this particles as seed, size tunable Pt-NPs of dTEM 3.1±1.0 nm to 5.7±1.6 nm with sufficient monodispersity were synthesized by multiple step seeding growth. Formation of Pt-NPs was confirmed by the UV-visible absorption spectra. Transmission electron micrographs (TEM) and powder X-ray diffraction (XRD) patterns confirmed that the particles were single crystalline with fcc crystal geometry.Bangladesh J. Sci. Ind. Res. 50(2), 87-92, 2015

Platinum nanoparticles

N-Vinylpyrrolidone

10.3329/bjsir.v50i2.24349

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Citations (7)

Terminalia belerica Mediated Green Synthesis of Nanoparticles of Copper, Iron and Zinc Metal Oxides as the Alternate Antibacterial Agents Against some Common Pathogens

BioNanoScience (2019)

S. Akhter Faiz Mohammad Shamim Ahmad

Reducing agent

10.1007/s12668-019-0601-4

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Citations (57)

Measurement of the Multi-Neutron $\barν_μ$ Charged Current Differential Cross Section at Low Available Energy on Hydrocarbon

arXiv (Cornell University) (2023)

A. Olivier T. Cai S. Akhter Z. Ahmad Dar V. Ansari

Neutron production in antineutrino interactions can lead to bias in energy reconstruction in neutrino oscillation experiments, but these interactions have rarely been studied. MINERvA previously studied neutron production at an average antineutrino energy of ~3 GeV in 2016 and found deficiencies in leading models. In this paper, the MINERvA 6 GeV average antineutrino energy data set is shown to have similar disagreements. A measurement of the cross section for an antineutrino to produce two or more neutrons and have low visible energy is presented as an experiment-independent way to explore neutron production modeling. This cross section disagrees with several leading models' predictions. Neutron modeling techniques from nuclear physics are used to quantify neutron detection uncertainties on this result.

Bar (unit)

Oscillation (cell signaling)

10.48550/arxiv.2310.17014

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Neutrino-Induced Coherent π+ Production in C, CH, Fe, and Pb at ⟨Eν

Physical Review Letters (2023)

M. A. Ramírez S. Akhter Z. Ahmad Dar F. Akbar V. Ansari

MINERvA has measured the ν_{μ}-induced coherent π^{+} cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe), and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed the predictions of the Rein-Sehgal and Berger-Sehgal PCAC based models at multi-GeV ν_{μ} energies and at produced π^{+} energies and angles, E_{π}>1 GeV and θ_{π}<10°. Measurements of the cross-section ratios of Fe and Pb relative to CH reveal the effective A scaling to increase from an approximate A^{1/3} scaling at few GeV to an A^{2/3} scaling for E_{ν}>10 GeV.

10.1103/physrevlett.131.051801

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Optimized reduction conditions for the microfluidic synthesis of 1.3 ± 0.3 nm Pt clusters

Journal of nanostructure in chemistry (2015)

M. Jakir Hossain Md Saidur Rahman Md Saidur Rahman M. A. Ali N. C. Nandi

Recently, small (<2 nm) and monodispersed Pt clusters has gained much attention due to their high catalytic activity in the aerobic oxidations. However, the chemical synthesis of small Pt clusters is not trivial; high temperature is often required to completely reduce the Pt4+/2+ ions to Pt0, which accelerates the growth of the Pt clusters. Here, we discussed a very simple microfluidic reduction of Pt4+ to Pt0 by NaBH4 in the presence of PVP that produces <2 nm Pt clusters in any variable reduction conditions. The microfluidic reduction conditions were optimized for the synthesis of possible smallest Pt clusters in terms of five reaction parameters: (1) temperature, (2) concentration of H2PtCl6, (3) molar ratio of NaBH4 to Pt4+ ions, (4) molar ratio of PVP-monomer to Pt4+ ions, and (5) molecular weight/chain length of PVP. We found that possible smallest particles with average diameter 1.3 ± 0.3 nm were produced when aqueous solutions of H2PtCl6 (4 mM) and NaBH4 (40 mM) containing PVP (160 mM) were injected into the micromixer placed in an icebath at a flow rate of 200 mL/h. The produced particles were characterized by UV–visible absorption spectrophotometry, powder X-ray diffractometry and transmission electron microscopy.

Micromixer

Nanochemistry

Molar ratio

10.1007/s40097-015-0179-5

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Citations (10)

Green Synthesis of Metal Oxide Nanoparticles Using Plumbago zeylanica Root Extract, Spectrochemical Characterization, and Antibacterial Activity Against Common Pathogen

Applied Research (2025)

S. Akhter Sajid Naeem Uzma Ansari Vasi Uddin Siddiqui Shivani Bharti

ABSTRACT The root extract of Plumbago zeylanica was used to produce iron oxide (FeO), zinc oxide (ZnO), and copper oxide (CuO) nanoparticles. These metal oxides are easy to produce, inexpensive, and ecologically friendly, with considerable antibacterial activity against common infections. The purpose of this work is to explore a sustainable synthesis method and to investigate the comparative antibacterial activity of these nanoparticles. The nanoparticles were characterized using a variety of techniques, including energy‐dispersive X‐ray (EDX), transmission electron microscopy (TEM), ultraviolet‐visible (UV‐vis) spectrophotometry, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy. The XRD patterns revealed the crystalline structures of the produced metal oxide nanoparticles by displaying prominent, intense peaks. Morphological investigation utilizing SEM and TEM techniques revealed the nanoparticles’ shapes and sizes, with an average particle size ranging from 9 to 36 nm. EDX spectra verified the presence of an oxide layer on all three metal oxide nanoparticles. UV‐vis and FTIR spectroscopy revealed additional optical characteristics. The antibacterial activities of FeO, ZnO, and CuO nanoparticles were tested using disk diffusion assays against Salmonella enterica , Staphylococcus aureus , and Escherichia coli . The results showed that the antibacterial efficiency of these nanoparticles varied according to the type of bacteria. ZnO nanoparticles had the highest antibacterial activity against both Gram‐positive and Gram‐negative bacteria, while FeO nanoparticles had the lowest antibacterial efficacy. These data imply that ZnO nanoparticles, in particular, have antibacterial properties.

Characterization

10.1002/appl.202400200

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High-statistics measurement of antineutrino quasielasticlike scattering at Eν¯ 6 GeV on a hydrocarbon target

Physical review. D/Physical review. D. (2023)

A. Bashyal S. Akhter Z. Ahmad Dar F. Akbar V. Ansari

We present measurements of the cross section for antineutrino charged-current quasielasticlike scattering on hydrocarbon using the medium energy NuMI wide-band neutrino beam peaking at antineutrino energy $⟨{E}_{\overline{\ensuremath{\nu}}}⟩\ensuremath{\sim}6\text{ }\text{ }\mathrm{GeV}$. The measurements are presented as a function of the longitudinal momentum (${p}_{||}$) and transverse momentum (${p}_{T}$) of the final state muon. This work complements our previously reported high statistics measurement in the neutrino channel and extends the previous antineutrino measurement made in a low energy beam at $⟨{E}_{\overline{\ensuremath{\nu}}}⟩\ensuremath{\sim}3.5\text{ }\text{ }\mathrm{GeV}$ out to ${p}_{T}$ of $2.5\text{ }\text{ }\mathrm{GeV}/\mathrm{c}$. Current theoretical models do not completely describe the data in this previously unexplored high ${p}_{T}$ region. The single differential cross section as a function of four-momentum transfer (${Q}_{QE}^{2}$) now extends to $4\text{ }\text{ }{\mathrm{GeV}}^{2}$ with high statistics. The cross section as a function of ${Q}_{QE}^{2}$ shows that the tuned simulations developed by the MINERvA Collaboration that agreed well with the low energy beam measurements do not agree as well with the medium energy beam measurements. Newer neutrino interaction models such as the GENIE v3 tunes are better able to simulate the high ${Q}_{QE}^{2}$ region.

10.1103/physrevd.108.032018

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Citations (1)

Plant-Mediated Green Synthesis of Zinc Oxide Nanoparticles Using Swertia chirayita Leaf Extract, Characterization and Its Antibacterial Efficacy Against Some Common Pathogenic Bacteria

BioNanoScience (2018)

S. Akhter Zafar Mahmood Shamim Ahmad Faiz Mohammad

Salmonella enterica

Gram-Negative Bacteria

10.1007/s12668-018-0549-9

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Citations (30)

Measurement of electron neutrino and antineutrino cross sections at low momentum transfer

Physical review. D/Physical review. D. (2024)

S. Henry Hang Su S. Akhter Z. Ahmad Dar V. Ansari

Accelerator based neutrino oscillation experiments seek to measure the relative number of electron and muon (anti)neutrinos at different L/E values. However high statistics studies of neutrino interactions are almost exclusively measured using muon (anti)neutrinos since the dominant flavor of neutrinos produced by accelerator based beams are of the muon type. This work reports new measurements of electron (anti)neutrinos interactions in hydrocarbon, obtained by strongly suppressing backgrounds initiated by muon flavor (anti)neutrinos. Double differential cross sections as a function of visible energy transfer, Eavail, and transverse momentum transfer, pT, or three momentum transfer, q3 are presented. Published by the American Physical Society 2024

Electron neutrino

Momentum transfer

10.1103/physrevd.109.092008

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Citations (0)

Purification of poly(vinylpyrrolidone) stabilized platinum nanoparticles by hemodialyzer

Nano-Structures & Nano-Objects (2017)

M. Jakir Hossain Md Saidur Rahman Mahmuda Khatun N. C. Nandi S. Akhter

Ultrafiltration (renal)

Platinum nanoparticles

10.1016/j.nanoso.2017.03.005

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Citations (6)