Probing the interactions of chitosan capped CdS quantum dots with pathogenic bacteria and their biosensing application

Abdelhamid, Hani Nasser; Wu, Hui‐Fen

doi:10.1039/c3tb21020k

Cited by 116 publications

(60 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to organic fluorephores, QDs are brighter and more stable; they also exhibit broad absorption and narrow emission spectra, a property useful for simultaneous excitation and detection 152 . Ligand-conjugated QDs have been extensively explored for the detection of various bacteria, including Escherichia coli ( E. coli ), S. typhimurium , Mycobacterium bovis (M. bovis) , and oral bacteria 153–155 . Additional strategies have been explored to further improve the sensitivity of QD-based bacterial detection systems.…”

Section: Nanoparticle-based Bacterial Detectionmentioning

confidence: 99%

Nanoparticle approaches against bacterial infections

Gao

Thamphiwatana

Angsantikul

et al. 2014

WIREs Nanomed Nanobiotechnol

272

162

View full text Add to dashboard Cite

Despite the wide success of antibiotics, the treatment of bacterial infection still faces significant challenges, particularly the emergence of antibiotic resistance. As a result, nanoparticle drug delivery platforms including liposomes, polymeric nanoparticles, dendrimers, and various inorganic nanoparticles have been increasingly exploited to enhance the therapeutic effectiveness of existing antibiotics. This review focuses on areas where nanoparticle approaches hold significant potential to advance the treatment of bacterial infection. These areas include targeted antibiotic delivery, environmentally responsive antibiotic delivery, combinatorial antibiotic delivery, nanoparticle-enabled antibacterial vaccination, and nanoparticle-based bacterial detection. In each area we highlight the innovative antimicrobial nanoparticle platforms and review their progress made against bacterial infections.

show abstract

Section: Nanoparticle-based Bacterial Detectionmentioning

confidence: 99%

Nanoparticle approaches against bacterial infections

Gao

Thamphiwatana

Angsantikul

et al. 2014

WIREs Nanomed Nanobiotechnol

272

162

View full text Add to dashboard Cite

show abstract

“…The broad peak reveals the polydispersity of CdS@CTS. 21 The physical properties of CdS QDs reveal strong connement of the excited electrons and holes in the nanocrystals. Furthermore, the real size of CdS QDs inside the CTS nanoparticles that was shown in SEM image (Fig.…”

Section: Characterization Of Quantum Nanobeads (Cds@cts)mentioning

confidence: 99%

“…1C). 21 Overall, the chitosan nanoparticles serve to disperse CdS QDs in aqueous media, protect the inorganic core from the invasive environment that decrease QDs stability, and decrease the metals leaching. 2B.…”

Section: Characterization Of Quantum Nanobeads (Cds@cts)mentioning

confidence: 99%

Synthesis and multifunctional applications of quantum nanobeads for label-free and selective metal chemosensing

Abdelhamid

2015

RSC Adv.

Self Cite

View full text Add to dashboard Cite

Due to the importance of quantum dots (QDs), fervent research continues for new preparations, surface modification and investigation of further applications. The facile preparation of CdS QDs embedded in chitosan nanoparticles (CTS) was synthesized, characterized and has been applied for various applications such as hydrogen peroxide (H 2 O 2 ) and selective detection of metals such as Cu(II) and Mn(II). CdS@CTS was characterized by TEM, SEM, UV-vis absorption, fluorescence, Fourier transform infrared (FTIR), and Raman spectroscopy. It was found that hydrogen peroxide (H 2 O 2 ) could directly oxidize CdS QDs and quench the fluorescence emission. The method is non-enzymatic, simple, direct, and sensitive. CdS@CTS was also applied for metal ion chemosensing such as Mn(II) and Cu(II).Among the different metal, CdS@CTS showed selectivity toward Cu(II) with a limit of detection of 50 nM and linear range of 30-330 mM. The detection could take place by the naked eye. Mechanistic studies were refuted using TEM and Raman spectroscopy.

show abstract

“…Moreover, other authors also used chitosan as capping agent for silver NPs, Ni 3 Se 2 NPs, gold nanorods, or even CdS QDs . However, in these cases, chitosan acts mainly as stabilizer being normally used to improve the biocompatibility of the nanostructures retaining their luminescent properties.…”

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

View full text Add to dashboard Cite

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.

show abstract

Probing the interactions of chitosan capped CdS quantum dots with pathogenic bacteria and their biosensing application

Cited by 116 publications

References 83 publications

Nanoparticle approaches against bacterial infections

Nanoparticle approaches against bacterial infections

Synthesis and multifunctional applications of quantum nanobeads for label-free and selective metal chemosensing

An overview of luminescent bio‐based composites

Contact Info

Product

Resources

About