Highly luminescent chitosan-l-cysteine functionalized CdTe quantum dots film: Synthesis and characterization

Kumar, Hridyesh; Srivastava, Rohit; Dutta, Parikshit

doi:10.1016/j.carbpol.2013.04.056

Cited by 43 publications

(21 citation statements)

References 41 publications

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“…Recently, the development of hybrid materials based on chitin and chitosan, especially by combining NPs/QDs has received significant attention due to the synergistic effects resulting from the chemical and physical interactions that occur between the organic and inorganic components. Moreover, bioconjugation of NPs/QDs with chitin and chitosan and their antimicrobial activities have been reported …”

Section: Introductionmentioning

confidence: 99%

Preparation of chitin‐CdTe quantum dots films and antibacterial effect on Staphylococcus aureus and Pseudomonas aeruginosa

Wansapura

Dassanayake

Hamood³

et al. 2017

J of Applied Polymer Sci

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Novel chitin–cadmium‐tellurium quantum dot (Chitin‐CdTeQD) hybrid films combining chitin and CdTe quantum dots (CdTeQDs) were prepared via a facile aqueous synthesis route at room temperature. Films were characterized by high‐resolution field emission scanning electron microscopy (HR‐FESEM) and energy dispersive X‐ray (EDX) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and X‐ray diffraction analysis (XRD). Antibacterial activity was studied on both Gram‐positive (Staphylococcus aureus) and Gram‐negative (Pseudomonas aeruginosa) bacteria. Antibacterial properties were investigated with agar diffusion testing assay and with confocal laser scanning microscopic image analysis. Chitin–CdTeQD films exhibited an excellent antibacterial activity against both Gram‐positive and Gram‐negative bacteria. Chitin–CdTeQD films might be a desirable antibacterial material for wide range of biomedical applications including wound dressing, burn treatment, drug delivery systems, packaging, ophthalmology, and implants. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44904.

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Section: Introductionmentioning

confidence: 99%

Preparation of chitin‐CdTe quantum dots films and antibacterial effect on Staphylococcus aureus and Pseudomonas aeruginosa

Wansapura

Dassanayake

Hamood³

et al. 2017

J of Applied Polymer Sci

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“…The possibility of preparing self‐standing luminescent chitosan films was explored by different authors as a way to enlarge their applications fields besides the previously described electrode coatings. In particular, taking advantage of their high transparency in the UV–vis region, some works revealed the possibility of preparing chitosan films doped with distinct luminescent fillers through the simple blending of components …”

Section: Chitosan‐derived Luminescent Materialsmentioning

confidence: 99%

“…For example, Tsvirko et al prepared chitosan films doped with Eu 3+ β‐diketonate complex, which showed good luminescence emission in the visible region, with a quantum efficiency of ∼ 47%. In a different study, Kumar et al described the preparation of highly luminescent and antibacterial chitosan‐based films loaded with water‐soluble l ‐cysteine‐functionalized CdTe QDs with a wide‐range dispersion of 3–18 nm. It was observed that for the same excitation wavelength, QDs show an emission at 525 nm, whereas CdTe QDs–chitosan film shows an emission at 514 nm; this blue shift was explained based on the electrostatic conjugation of CdTe QDs with l ‐cysteine.…”

Section: Chitosan‐derived Luminescent Materialsmentioning

confidence: 99%

An overview of luminescent bio‐based composites

Pinto

Carlos

Marques

et al. 2014

J of Applied Polymer Sci

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The development of inorganic/organic composite materials represents a fast-growing interdisciplinary area in materials science and engineering. In this topic, a key idea is the production of composites comprising biopolymers and functional inorganic phases that could replace conventional materials in several high-technology applications. Following this concept, the use of different polymers from renewable sources, such as cellulose, starch, alginate, and chitosan, have gained great relevance because of their renewable nature, potential biocompatibility, and biodegradability, as well as specific physicochemical properties. The combination of these biopolymers with different fillers (including inorganic nanoparticles (NPs), clusters, or ions) allows the design of innovative biobased materials with specific and/or improved properties, namely, optical, mechanical, and barrier properties, luminescence, and biological properties (as antimicrobial activity and biocompatibility). This review will focus on the most important synthetic approaches, properties, and applications of luminescent bio-based composites obtained by combining different biopolymers and fillers.

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“…Since l-Cys provided the suitable environment for immobilization of Hb on CS [19], it is possible that a composite film of CS and CdS QDs functionalized l-Cys modified GCE for immobilization of Hb will provide a high sensitivity sensor for H 2 O 2 .…”

Section: Introductionmentioning

confidence: 99%

A Highly Sensitive Hydrogen Peroxide Biosensor Based on Hemoglobin Immobilized on Cadmium Sulfide Quantum Dots/Chitosan Composite Modified Glassy Carbon Electrode

et al. 2014

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An L‐cysteine capped cadmium sulfide‐chitosan nanocomposite has been synthesized, characterized and used for surface modification of a glassy carbon electrode. With direct electron transfer, hemoglobin (Hb) adsorbed strongly on the nanocomposite and displayed excellent bioelectrocatalysis for H2O2. The biosensor was capable of reducing H2O2 at −0.35 V, with a detection limit of 3.13 nM, linearity in the range of 15 nM to 10 µM and a response time of less than 2 s. The MichaelisMenten constant (KM) was 0.57 nM, attesting high bioelectrocatalysis of immobilized Hb for H2O2. Reproducibility of the fabrication method was very satisfactory with a relative standard deviation of 5.3 %. The biosensor lost only 6.5 % of its original response after 7 days when stored in a pH 7.4 PBS at 4 °C.

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Highly luminescent chitosan-l-cysteine functionalized CdTe quantum dots film: Synthesis and characterization

Cited by 43 publications

References 41 publications

Preparation of chitin‐CdTe quantum dots films and antibacterial effect on Staphylococcus aureus and Pseudomonas aeruginosa

Preparation of chitin‐CdTe quantum dots films and antibacterial effect on Staphylococcus aureus and Pseudomonas aeruginosa

An overview of luminescent bio‐based composites

A Highly Sensitive Hydrogen Peroxide Biosensor Based on Hemoglobin Immobilized on Cadmium Sulfide Quantum Dots/Chitosan Composite Modified Glassy Carbon Electrode

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