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2 article(s) from Das, Abhishek

Fabrication of hafnium-based nanoparticles and nanostructures using picosecond laser ablation

Abhishek Das,
Mangababu Akkanaboina,
Jagannath Rathod,
R. Sai Prasad Goud,
Kanaka Ravi Kumar,
Raghu C. Reddy,
Ratheesh Ravendran,
Katia Vutova,
S. V. S. Nageswara Rao and
Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1639–1653, doi:10.3762/bjnano.15.129

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Figure 1: (a) XRD data and (b) EDX data of pristine Hf target.

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Figure 2: Schematic representation of the experimental setup used for picosecond LAL of a Hf target (M_n repre...

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Figure 3: TEM images, particle size distributions, and SAED patterns of laser-ablated NPs in (a–c) DW, (d–f) ...

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Figure 4: High-resolution TEM images of laser-ablated NPs in (a) DW, (b) toluene, and (c) anisole.

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Figure 5: Zoomed TEM images of the shell-like structures shown in Figure 4b and Figure 4c for (a) toluene and (b) anisole (the ...

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Figure 6: SAED measurement locations and patterns for (a, b) nanofibres and (c, d) NPs obtained in DW.

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Figure 7: EDX spectra and elemental composition of (a) HfNPs-D, (b) HfNPs-T, and (c) HfNPs-A.

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Figure 8: Reflectance spectra of NPs drop-cast on Si substrates measured under different incident angles: (a)...

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Figure 9: PL spectra of NPs laser-ablated in (a) DW, (b) toluene, and (c) anisole.

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Figure 10: Schematic of the NS fabrication by raster scanning the sample, resulting in LSFL and HSFL formation....

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Figure 11: FESEM image and inverse FFTs of LSFL with spatial periodicity on laser-ablated NSs in (a, b) DW, (c...

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Figure 12: FESEM image and HSFL size distribution of NSs laser-ablated in (a, b) DW, (c, d) toluene, and (e, f...

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Figure 13: Spatial periodicity of (a) LSFL and (b) HSFL as function of the refractive index.

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Full Research Paper

Published 18 Dec 2024

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Facile synthesis of size-tunable L-carnosine-capped silver nanoparticles and their role in metal ion sensing and catalytic degradation of p-nitrophenol

Akash Kumar,
Ridhima Chadha,
Abhishek Das,
Nandita Maiti and
Rayavarapu Raja Gopal

Beilstein J. Nanotechnol. 2024, 15, 1576–1592, doi:10.3762/bjnano.15.124

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Figure 1: Schematic representation of the synthesis of tunable ʟ-carnosine-capped silver nanoparticles (ʟ-car...

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Figure 2: Optical absorbance of (a) ʟ-carnosine-capped AgNP1 and (b) ʟ-carnosine-capped AgNP2–AgNP5. The inse...

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Figure 3: (a) Hydrodynamic size and zeta potential of ʟ-carnosine-capped silver nanoparticles and TEM microgr...

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Figure 4: (a) FTIR spectra of ʟ-carnosine and ʟ-car-AgNPs. Raman spectra of (b) ʟ-carnosine (solid and aqueou...

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Figure 5: Heavy metal ion sensing using ʟ-car-AgNP1. (a) UV–vis spectrophotometric determination of Cd²⁺, Pb²⁺...

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Figure 6: Heavy metal ion sensing using ʟ-car-AgNP2 and ʟ-car-AgNP5. (a) UV–vis spectrophotometric determinat...

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Figure 7: Interference study regarding the metal ion selectivity of ʟ-car-AgNP1. (a) Optical absorbance of di...

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Figure 8: Interference study regarding the metal ion selectivity of ʟ-car-AgNP2. (a) Optical absorbance of di...

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Figure 9: (a–e) UV–vis absorption measurements showing the catalytic degradation of 0.25 mM P-NP using ʟ-carn...

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Full Research Paper

Published 06 Dec 2024

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