Effects of structural parameters on the optical and magnetic properties of surface stabilized intrinsic CdSe nanoparticles

Pokhriyal, Sumit; Biswas, Somnath

doi:10.1016/j.apsusc.2019.144040

Cited by 8 publications

(8 citation statements)

References 59 publications

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“…As can be noticed, two broad emission bands appeared at 432 nm and 455 nm in the CdSe NPs, while the nanocomposite films show the prominent bands at 435 nm and 515 nm along with three very weak bands at 457 nm, 481 nm and 574 nm. The bands at 435 nm and 457 nm (432 nm and 455 nm, respectively in the pristine NPs) can be ascribed to near band edge transitions in the strongly quantized NPs [37,48,[56][57][58]. The weak band observed at 481 nm in Sample B originates from the recombination of impurity bound excitons [35,50].…”

Section: Resultsmentioning

confidence: 98%

“…Introducing new non-radiative pathways lowers the PL efficiency [67,69]. The trap sites and defects generated on the surface of the CdSe NPs due to partial coordination of the surface atoms with PVA are playing a vital role in the reduction of the radiative recombinations of the present samples [37,48,55,62,67].…”

Section: Resultsmentioning

confidence: 99%

“…The ferromagnetic CdSe NPs were synthesized by a simple chemical process described in detail in our previous publication [48]. In brief, aqueous solutions of 0.1 M cadmium chloride dehydrate (CdCl 2 .2.5H 2 O) (40 ml) and 0.1 M selenous acid (H 2 SeO 3 ) (40 ml) were added drop-wise (with uninterrupted magnetic stirring) into 150 ml mixed solution of PVA (4%, 100 ml) and sucrose (40%, 50 ml) at 60 • C. Throughout the reaction, the pH level was maintained at 8-9 by adding required amount of ammonia solution.…”

Section: Synthesis Of Cdse Npsmentioning

confidence: 99%

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Photoresponse of CdSe-PVA nanocomposite films at low magnetic fields

Pokhriyal

Biswas²

2020

Nanotechnology

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A set of nanocomposite films of poly-vinyl alcohol (PVA) and 0.1–0.4 wt% CdSe nanoparticles (NPs) were developed by spin coating and their surface resistance (R) was measured as a function of light illumination intensity (IL ) and applied magnetic field (H). The ferromagnetic CdSe NPs were synthesized by a facile chemical method which ensured in situ surface stabilization with a skinny layer of graphitic carbon. The CdSe NPs were uniformly dispersed in an aqueous solution of 2.0 wt% PVA and spin-coated on fluorine-doped tin oxide coated glass substrates. The photoresponse of the nanocomposite films at low H exhibits their efficacy for pertinent applications in optoelectronics.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Cdse Npsmentioning

confidence: 99%

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Photoresponse of CdSe-PVA nanocomposite films at low magnetic fields

Pokhriyal

Biswas²

2020

Nanotechnology

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“…The foremost goals in designing nanoparticles as a transport system are to govern particle length, surface residences and release of pharmacologically active agents that will acquire the drug's site-specific action on the therapeutically most beneficial charge and dose regimen [2].  It is simple to alter the surface properties and particle size of nanoparticles to enable both passive and active medication targeting after parenteral administration.…”

Section: Introductionmentioning

confidence: 99%

A review: Recent advancement in the formulation and evaluation of the nanoparticles and its application

Ankita V. Rathod,

Vinayak A. Katekar,

Swati P. Deshmukh

2023

GSC Biol. Pharm. Sci.

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Due to their unique or superior physical and chemical properties compared to bulk material, nanoparticles have become extremely popular in recent years. The pharmacokinetic and pharmacodynamic properties of many different types of pharmacological compounds have been altered and improved by using particle systems like nanoparticles. They were used in vivo to prevent the drug entity from leaving the systemic circulation, restrict drug access to the targeted areas, and deliver the drug at a steady and controlled rate to the site of action. To maximize therapeutic benefit while reducing adverse effects, a variety of polymers have been utilized in the nanoparticle drug delivery method. Because of its great selectivity towards the target region, nanotechnology use is significantly important in the field of medicine delivery since it can limit the potentially toxic effects of medication on normal cells. Nanoparticles (NP) play a crucial role and can conjugate with various medications using exact methods to deliver the drug to the target place. The nanoparticle surface is constructed with co-polymers to provide protection from immune cells and ligands to gain affinity inside the course of particular cells. The drug that is attached to nanoparticles can eventually recognize the location, join the target, and enter the cell by receptor-mediated endocytosis. Nanoparticles can then release medications under controlled conditions to treat disorders. Here, the review gives various aspects of the nanoparticle characterization, formulation, evaluation and application in delivery of drug molecules.

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“…In recent times, transition metal chalcogenides based nanomaterials particularly those belonging to the II-VI semiconductor group had garnered interest in various applications because of their interesting physical properties such as increasing bandgap due to electron confinement [1]- [4]. Among all the binary chalcogenide semiconductor materials, cadmium sulfide (CdS) nanoparticles (NPs) stands out to be the most commonly investigated material mostly due to its wide energy band gap of 2.4 eV [5].…”

Section: Introductionmentioning

confidence: 99%

IMPACT OF CADMIUM SALT CONCENTRATION ON CdS NANOPARTICLES SYNTHESIZED BY CHEMICAL PRECIPITATION METHOD

Najm¹,

CHOWDHURY²,

MUNNA³

et al. 2020

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In this study, cadmium sulfide (CdS) nanoparticles (NPs) were synthesized via chemical precipitation, a facile and cost effective method. The effects of various cadmium salt concentration on the characteristics of CdS NPs has been analyzed to understand the structure properties relationship for optoelectronics applications. XRD, FESEM, Raman Spectra, and UV–Vis has been used to characterize the prepared samples. The optical measurement indicates that there is a direct transition in accordance to energy band gap among 2.36 as well as 2.4 eV. The XRD diffract grams verify that all the films deposited have been polycrystalline of cubic as well as hexagonal structure with superior orientation (111). Analysis of EDX displayed that certain films have been stoichiometric with a small deficiency in sulphur. By optimizing the molar concentration of cadmium ions, the optoelectronic properties of the CdS NPs can be tuned accordingly.

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Effects of structural parameters on the optical and magnetic properties of surface stabilized intrinsic CdSe nanoparticles

Cited by 8 publications

References 59 publications

Photoresponse of CdSe-PVA nanocomposite films at low magnetic fields

Photoresponse of CdSe-PVA nanocomposite films at low magnetic fields

A review: Recent advancement in the formulation and evaluation of the nanoparticles and its application

IMPACT OF CADMIUM SALT CONCENTRATION ON CdS NANOPARTICLES SYNTHESIZED BY CHEMICAL PRECIPITATION METHOD

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