Quantum Dots

Maxwell, Tyler; Campos, Maria Gabriela Nogueira; Smith, Stephen J.; Doomra, Mitsushita; Thwin, Zon; Santra, Santimukul

doi:10.1016/b978-0-12-816662-8.00015-1

Cited by 49 publications

(34 citation statements)

References 150 publications

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“…In P. aeruginosa, all as prepared QDs showed better activity (ZOI) while in case of K. pneumoniae, CdSe/CdS/ZnS showed the excellent activity, all the rest were resistive. Recently, CdSe- and ZnS-based core–multi-shell quantum dots were reported in biomedical era for cancel cell treatment. , …”

Section: Resultsmentioning

confidence: 99%

Effect of Polymer Capping on Photonic Multi-Core–Shell Quantum Dots CdSe/CdS/ZnS: Impact of Sunlight and Antibacterial Activity

et al. 2020

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The highly luminescent CdSe/CdS/ZnS core–multi-shell quantum dots (QDs) were prepared without a protective atmosphere through the precursor injection method (phosphine free) in paraffin liquid and oleic acid. Polymers (PEG, PVA, PVP, and PAA) were coated to CdSe/CdS/ZnS core–multi-shell quantum dots to increase stability. However, core–multi-shell structured QDs reveal enhanced emission in the range 355–410 nm by suppressing the defect sensitive cores and nonradioactive recombination in PL spectra. The cubic zinc blended quantum dots with crystallite size in the range 22–44 nm, as confirmed by XRD, were obtained. The resultant absorption spectra of all the samples showed that the samples were absorbent in the UV region over the 302–380 nm range. In the FT-IR spectrum 712, 731, and 400–700 cm–1 band values were assigned to CdSe, CdS, and ZnS band stretching, respectively. Images of CdSe, CdSe/CdS, and CdSe/CdS/ZnS quantum dots obtained from the SEM were spherical whereas QDs capped with different polymers (PEG, PVA, PVP, and PAA) showed nanofibers that were linear and homogeneous size ranged between 12 and 38 nm. These as prepared QDs were placed under visible light for 48 h. After absorbing UV light, the range of UV–vis intensity was enhanced until 389–464 nm and emission intensity enhanced until 492–509 nm, which was confirmed by UV and PL spectra. CdSe/CdS/ZnS QDs with organic ligands revealed antibacterial activity over a broad range against Klebsiella Pneumoniae and Pseudomonas aeruginosa.

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Section: Resultsmentioning

confidence: 99%

Effect of Polymer Capping on Photonic Multi-Core–Shell Quantum Dots CdSe/CdS/ZnS: Impact of Sunlight and Antibacterial Activity

et al. 2020

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“…QDs can be categorized on the basis of the composition of materials used, such as metal (e. g., Ni, Co, Pt, Au) or semiconductor materials. [3,64] QDs can also be obtained from metalloids such as silicon-based QDs, has been used in various studies. QDs have unique properties compared to bulk solids due to quantum confinement effects responsible for their beneficial features.…”

Section: Quantum Dotsmentioning

confidence: 99%

“…Quantum Dots (QDs) are semiconductor nanoparticles that exhibit extraordinary electrical and optical capabilities as a result of the quantum phenomena that occur at the nanoscale. [2,3] Due to their advantages over conventional probes based on organic or inorganic fluorescent dyes, QDs have been used in the preparation of nanosensors. MIPs embedded with QDs has a great application in the extraction and detection of various compounds due to their simplicity and high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Molecularly Imprinted Polymers Embedded with Quantum Dots and Their Implementation as an Alternative Approach for Extraction and Detection of Crocin

et al. 2022

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Molecularly imprinting polymer (MIPs) is an emerging technology that could provide an alternative path to produce receptor-like binding sites. The technology involves complex bond formation between target molecules (templates), and functional monomers can occur insolvent. MIPS embedded with Quantum Dots (QDs) as a sensor is used for extraction and detection of various compounds. QDs have fluorescence properties and electronic characteristics such as comprehensive and continuous absorption spectra, narrow emission spectra, and high light resistance. Crocin is the major metabolite obtained from saffron (Crocus sativus). It is widely used as an antioxidant, antidiabetic, antitumor, and anticancer agent. According to recent studies, crocin has been used for drug delivery to treat various diseases. Therefore, the isolation, extraction and detection of crocin from saffron are of prime importance. Developing a selective extraction and detection technique for crocin would assist in its separation and purification easily from saffron stigmas. MIPs encapsulated with QDs is a promising tool for the extraction and detection of various compound, and this technique could also be employed for crocin. In this review, a brief summary of MIPs, QDs and MIP-QDs sensors has been summarised. Moreover, an effort has been made to review how MIPs encapsulated with QDs can be used as the best alternative for efficiently extracting and detecting crocin.

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“…Due to their size, it is common for quantum dots to be incorporated into other nanomaterials for drug delivery, such as hydrogels, mesoporous silica, polymeric nanoparticles, or liposomes. Additionally, they are sensitive to stimuli, since fluorescence can be altered by a change in pH or by changes in the chemical environment, which provides additional information on drug release [147]. Precisely, Shu and col. designed a new nanosystem, incorporating ZnSe/ZnS quantum dots on βCD and chitosan polymer loaded with suberoylanilide hydroxamic acid [148], where the drug encapsulation efficiency was 22%.…”

Section: Quantum Dotsmentioning

confidence: 99%

Cyclodextrin-Modified Nanomaterials for Drug Delivery: Classification and Advances in Controlled Release and Bioavailability

et al. 2021

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In drug delivery, one widely used way of overcoming the biopharmaceutical problems present in several active pharmaceutical ingredients, such as poor aqueous solubility, early instability, and low bioavailability, is the formation of inclusion compounds with cyclodextrins (CD). In recent years, the use of CD derivatives in combination with nanomaterials has shown to be a promising strategy for formulating new, optimized systems. The goals of this review are to give in-depth knowledge and critical appraisal of the main CD-modified or CD-based nanomaterials for drug delivery, such as lipid-based nanocarriers, natural and synthetic polymeric nanocarriers, nanosponges, graphene derivatives, mesoporous silica nanoparticles, plasmonic and magnetic nanoparticles, quantum dots and other miscellaneous systems such as nanovalves, metal-organic frameworks, Janus nanoparticles, and nanofibers. Special attention is given to nanosystems that achieve controlled drug release and increase their bioavailability during in vivo studies.

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Quantum Dots

Cited by 49 publications

References 150 publications

Effect of Polymer Capping on Photonic Multi-Core–Shell Quantum Dots CdSe/CdS/ZnS: Impact of Sunlight and Antibacterial Activity

Effect of Polymer Capping on Photonic Multi-Core–Shell Quantum Dots CdSe/CdS/ZnS: Impact of Sunlight and Antibacterial Activity

An Overview of Molecularly Imprinted Polymers Embedded with Quantum Dots and Their Implementation as an Alternative Approach for Extraction and Detection of Crocin

Cyclodextrin-Modified Nanomaterials for Drug Delivery: Classification and Advances in Controlled Release and Bioavailability

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