One-pot synthesis and characterization of InP/ZnSe semiconductor nanocrystals

Mushonga, Paul; Onani, Martin O.; Madiehe, Abram Madimabe; Meyer, Mervin

doi:10.1016/j.matlet.2012.12.102

Cited by 11 publications

(11 citation statements)

References 18 publications

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“…No report was given on the cytotoxicity of the product or a ligand exchange process but rather only dispersion in n-hexane solvent. The synthesis of the same product was again reported by Mushonga et al (2013). This second study dwelt much on the optimization of the synthesis method.…”

Section: Introductionmentioning

confidence: 70%

“…During the synthesis, the reaction was scaled up. Firstly, we synthesized the QDs using lower molar ratios (small scale) of the reactants as reported in earlier work by Mushonga et al (2013). Typically, we used indium acetate (0.0438 g), P(TMS) 3 (21.7 lL), palmitic acid (0.1153 g), zinc undecylenate precursor (3.75 mL), selenium precursor (1.5 mL) and 1-octadecene (4 mL).…”

Section: Resultsmentioning

confidence: 99%

“…Generally, there was no significant photo-spectral difference between the spectra of the synthesized particles using small scale of the InP/ZnSe nanocrystals and the scaled up synthesis. Mushonga et al (2013) reported synthesis of InP/ZnSe where two aliquots were measured after 30 and 120 min during the growth of the InP core and observed no significant change in the emission wavelength. However, they noted that there was slight blue shift from 579 nm for InP (core) to 574 nm for the InP/ZnSe.…”

Section: Resultsmentioning

confidence: 99%

“…The method developed by Mushonga et al (2013) was adopted with some modifications in this study for the synthesis of the InP/ZnSe nanocrystals. Briefly, Indium acetate was mixed with palmitic acid at the molar ratio of 1:3 using a non-coordinating solvent (1-octadecene).…”

Section: Synthesis and Scaled Up Synthesis Of Inp/znse Quantum Dotsmentioning

confidence: 99%

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The cytotoxicity studies of water-soluble InP/ZnSe quantum dots

et al. 2016

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Biomedical applications require nanocrystals with a narrow emission spectra and low toxicity. One major challenge of using quantum dots (QDs) in biomedical studies has been to synthesize them in large quantities while retaining desirable optical properties. To date, no research has been carried out to scale up the synthesis of InP/ZnSe nanocrystals. In this regard we synthesized InP/ZnSe nanocrystals using lower volumes and masses and scaled up the synthesis while retaining their molar ratios. The properties of the products obtained in small scale and scaled up syntheses were compared in regard to changes in particle size, emission wavelength and the trend of fluorescence of the aliquots. The particle size for the small scale reaction was determined to be 4.18 nm. When the synthesis was scaled up by a factor of 2, 4 and 6, the sizes were found to increase to 4.31, 4.13 and 4.37 nm, respectively. We also demonstrated the ability to tune the emission wavelength by sorting the particles in the crude product to different sizes. The size sorting process gave QDs with varied emission wavelengths and also narrow emission spectra. We further demonstrated a facile method for their water solubility as well as suitability for various biological applications. The toxicity of the synthesized InP/ZnSe nanocrystals was investigated. The cytotoxicity studies were carried out using two different types of noncancerous human cell lines, namely KMST6 and MCF-12A, which clearly showed that the nanocrystals have low toxicity and are suitable for biological applications.

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Section: Introductionmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Scaled Up Synthesis Of Inp/znse Quantum Dotsmentioning

confidence: 99%

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The cytotoxicity studies of water-soluble InP/ZnSe quantum dots

et al. 2016

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“…Therewith, the authors noted that the composi tion of the shell was not quite clear; because of the one pot manner of its growth, they failed to determine if it consisted of pure ZnS or rather was a mixture of compounds. Some works were devoted to the growth of shells formed from semiconductors of other com positions, e.g., CdSe [39], CdS [40], ZnSe [41,42], ZnSe/ZnS [43][44][45], or ZnCdSe 2 [46]. However, the overwhelming majority of publications have dealt with the production and investigation of structures com prising ZnS shells [47][48][49][50][51][52][53][54][55].…”

Section: The Effect Of An Additional Semiconductor Shellmentioning

confidence: 99%

Synthesis and properties of colloidal indium phosphide quantum dots

Бричкин

2015

Colloid J

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Semiconductor colloidal quantum dots possessing unique spectral luminescent characteristics are of great interest for the development of novel materials and devices, which are promising to be used in var ious fields. However, the contemporary high quality quantum dots contain Cd, Pb, Hg, Se, and Te ions and are toxic, with this circumstance limiting their wide practical application. Therefore, the attention of researchers has recently been focused on A III B V semiconductor quantum dots-in particular, InP ones, which are markedly more environmentally safe. InP quantum dots have spectral characteristics similar to those of well studied CdSe quantum dots and can, in principle, replace the latter in many cases, especially, taking into account their more pronounced size effect caused by the narrow energy gap and the large Bohr radius of the exciton. Moreover, the stronger InP covalent bond than the ionic one in A II B VI semiconductors makes it possible to expect that they have a higher photostability and stability in active media. This work pre sents a review of the modern literature devoted to the synthesis and properties of colloidal indium phosphide quantum dots, which are very promising for use as substitutes of toxic cadmium based quantum dots.

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