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Guleria A, Aishwarya J, Kunwar A, Neogy S, Debnath AK, Rath MC, Adhikari S, Tyagi AK. Solvated electron-induced synthesis of cyclodextrin-coated Pd nanoparticles: mechanistic, catalytic, and anticancer studies. Dalton Trans 2023; 52:1036-1051. [PMID: 36602081 DOI: 10.1039/d2dt03219h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Herein, using in situ generated solvated electrons in the reaction media, a highly time-efficient, one-pot green approach has been employed to synthesize palladium (Pd) nanoparticles (NPs) coated with a molecular assembly of α-cyclodextrin (α-CD). The appearance of a shoulder peak at 280 nm in the UV-Vis absorption spectra indicated the formation of Pd NPs, which was further confirmed from their cubic phase XRD pattern. The nanomorphology varied considerably as a function of the dose rate, wherein sphere-shaped NPs (average size ∼ 7.6 nm) were formed in the case of high dose rate electron-beam assisted synthesis, while nanoflakes self-assembled to form nanoflower-shaped morphologies in a γ-ray mediated approach involving a low dose rate. The formation kinetics of NPs was investigated by pulse radiolysis which revealed the formation of Pd-based transients by the solvated electron-induced reaction. Importantly, no interference of α-CD was observed in the kinetics of the transient species, rather it played the role of a morphology directing agent in addition to a biocompatible stabilizing agent. The catalytic studies revealed that the morphology of the NPs has a significant effect on the reduction efficiency of 4-nitrophenol to 4-aminophenol. Another important highlight of this work is the demonstration of the morphology-dependent anticancer efficacy of Pd NPs against lung and brain cancer cells. Notably, flower-shaped Pd NPs exhibited significantly higher cancer cell killing as compared to spherical NPs, while being less toxic towards normal lung fibroblasts. Nonetheless, these findings show the promising potential of Pd NPs in anticancer treatment.
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Affiliation(s)
- A Guleria
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. .,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
| | - J Aishwarya
- ACTREC (TMC), Kharghar, Navi Mumbai, India.,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
| | - A Kunwar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. .,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
| | - S Neogy
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - A K Debnath
- Technical Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - M C Rath
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. .,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
| | - S Adhikari
- Scientific Information Resource Division, Bhabha Atomic Research Centre, Mumbai 400085, India.,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
| | - A K Tyagi
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. .,Homi Bhabha National Institute, Mumbai 400094, Trombay, India
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Palladium Nanoparticles Synthesized by Laser Ablation in Liquids for Antimicrobial Applications. NANOMATERIALS 2022; 12:nano12152621. [PMID: 35957051 PMCID: PMC9370528 DOI: 10.3390/nano12152621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 02/01/2023]
Abstract
Antibiotic resistance is a leading cause of death worldwide. In this paper, we explore new alternatives in the treatment of infections. Noble metal nanoparticles could help to mitigate this problem. In this work, palladium nanoparticles were synthesized by laser ablation in order to explore their antimicrobial capacity. To obtain palladium nanoparticles, a palladium plate immersed in water, or methanol, was ablated, using two pulsed lasers that emit radiation with wavelengths of 532 nm and 1064 nm, respectively. Pure Pd-NPs with crystalline microstructure and rounded shape were obtained. The nanoparticles’ size is more homogeneous if the laser wavelength is 532 nm, and it decreases when methanol is used as solvent, reaching mean diameters smaller than 6 nm. With the objective of studying antimicrobial activity against Staphylococcus aureus, the Pd-NPs were immobilized on the surface of titanium discs. The release of palladium ions was recorded during the first seven days, and the cytotoxicity of the immobilized NPs was also tested with L929 mouse fibroblast cell line. Palladium nanoparticles synthesized by means of the infrared laser in methanol showed a strong inhibitory effect on S. aureus and good cytocompatibility, with no toxic effect on fibroblast cells.
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Quon S, Jo DY, Han GH, Han SS, Seo MG, Lee KY. Role of Pt atoms on Pd(1 1 1) surface in the direct synthesis of hydrogen peroxide: Nano-catalytic experiments and DFT calculations. J Catal 2018. [DOI: 10.1016/j.jcat.2018.10.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Park H, Reddy DA, Kim Y, Lee S, Ma R, Kim TK. Synthesis of Ultra-Small Palladium Nanoparticles Deposited on CdS Nanorods by Pulsed Laser Ablation in Liquid: Role of Metal Nanocrystal Size in the Photocatalytic Hydrogen Production. Chemistry 2017; 23:13112-13119. [DOI: 10.1002/chem.201702304] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Hanbit Park
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - D. Amaranatha Reddy
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Yujin Kim
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Seunghee Lee
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Rory Ma
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Tae Kyu Kim
- Department of Chemistry and Chemical Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
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Russo P, Liang R, He RX, Zhou YN. Phase transformation of TiO 2 nanoparticles by femtosecond laser ablation in aqueous solutions and deposition on conductive substrates. NANOSCALE 2017; 9:6167-6177. [PMID: 28447695 DOI: 10.1039/c7nr00201g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Titanium dioxide (TiO2) is a wide bandgap semiconductor that is chemically stable, non-toxic, and economical compared to other semiconductors and has been implemented in a wide range of applications such as photocatalysis, photovoltaics, and memristors. In this work we studied the femtosecond laser ablation of titanium dioxide powders (P25) dispersed either in water or deposited onto a fluoride-doped tin oxide (FTO) substrate. The process was used as a route to induce the phase-transformation of TiO2 nanoparticles which was governed by laser parameters such as ablation time and power. It was observed that upon increase of the ablation time of TiO2 dispersion in water a bandgap widening occurred, leading to the possibility of bandgap engineering of TiO2 using controlled laser parameter profiles.
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Affiliation(s)
- Paola Russo
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave., West Waterloo, Ontario N2L 3G1, Canada.
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