Photoluminescence sensing of bilirubin in human serum using l-cysteine tailored manganese doped zinc sulphide quantum dots

Abha, Km.; Nebu, John; Devi, J.S. Anjali; Aparna, R.S.; Anjana, R R; Aswathy, Ajayakumar; George, Sony

doi:10.1016/j.snb.2018.11.063

Cited by 53 publications

(28 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sulfide quantum dots were commonly synthesized by simple aqueous method and used various stabilizing agents or sulfides to maintain metal atoms in order to assembly into nanodots. The stabilizing agents or sulfides were surface ligands and S sources, and the stabilizing agents included cysteamine, mercaptoacetic acid, l-cysteine, N-acetyl-l-cysteine, bovine serum albumin [ 67 , 69 , 87 , 93 , 94 , 95 ]. To date, various of sulfide quantum dots, such as PbS quantum dots, Ag 2 S quantum dots and CdSeS/ZnS quantum dots, have been available in the market.…”

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

“…Due to optical responses of sulfide quantum dots from the visible to the near infrared (NIR), sulfide quantum dots have received extensive attention in the field of biosensing [ 8 , 126 ]. They have been widely used as alternative probes for biomolecules via various strategies, such as electrochemical, PEC, ECL and PL strategies [ 94 , 109 , 126 , 127 ].…”

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

“…Rong et al [ 142 ] have synthesized novel Eu 3+ ion-functionalized fluorescent MoS 2 quantum dots for biosensing Guanosine 3′-diphosphate-5′-diphophate (ppGpp) ( Figure 5 A). Literature has also reported fluorescence biosensors for determining other biomolecules, such as thrombin, glutathione S-transferase enzyme, bilirubin [ 91 , 94 , 143 , 144 ] via PL strategies.…”

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

See 2 more Smart Citations

Biosensors Based on Advanced Sulfur-Containing Nanomaterials

Wang

Jiang

et al. 2020

Sensors

View full text Add to dashboard Cite

In recent years, sulfur-containing nanomaterials and their derivatives/composites have attracted much attention because of their important role in the field of biosensor, biolabeling, drug delivery and diagnostic imaging technology, which inspires us to compile this review. To focus on the relationships between advanced biomaterials and biosensors, this review describes the applications of various types of sulfur-containing nanomaterials in biosensors. We bring two types of sulfur-containing nanomaterials including metallic sulfide nanomaterials and sulfur-containing quantum dots, to discuss and summarize the possibility and application as biosensors based on the sulfur-containing nanomaterials. Finally, future perspective and challenges of biosensors based on sulfur-containing nanomaterials are briefly rendered.

show abstract

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

Section: Sulfur-containing Quantum Dotsmentioning

confidence: 99%

See 1 more Smart Citation

Biosensors Based on Advanced Sulfur-Containing Nanomaterials

Wang

Jiang

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…These are excellent inorganic luminophores and due to the apparent quantum confinement effect, QDs have unique optical and electrical properties such as broad excitation spectra, high luminous efficiency, narrow and symmetrical emission spectrum, controllable emission wavelength, good water dispersibility and low photobleaching sensitivity equated with the equivalent bulk materials [16]. Many reports on the use of QDs with different surface modification are available in the literature for analysis of antibiotics and other medications [4], veterinary medicines [15], compounds found in human body [16][17][18], neurotransmitters and radioprotectants [16,19], metal ions [20], anions [16,21], toxicants [22], pesticides [16,23], antioxidants [24], explosives [16], industrial chemicals [25] and many more.…”

Section: Introductionmentioning

confidence: 99%

Mn-DOPPED ZnS QUANTUM DOTS AS SENSITIVE SENSOR FOR DETERMINATION OF CIPROFLOXACIN IN PHARMACEUTICAL AND BIOLOGICAL SAMPLES

Jan

Ara

Ali

et al. 2021

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

A simple and fast spectrofluorimetric method for determination of ciprofloxacin based on its quenching effect on the fluorescence intensity of colloidal water soluble TGA caped, Mn doped ZnS quantum dots (QDs) has been described. The QDs having characteristic fluorescence spectra with maximum excitation at 315 nm followed by an emission peak at 632 nm were characterized using Energy Dispersive X-Ray and X-ray Diffraction techniques. The effect of various parameters such as concentration of QDs, time, pH, common excipients and metal ions on the quenching phenomenon was investigated. Fluorescence quenching was found to be maximum with 10 µg mL -1 of QDs at pH 8 and fluorescence intensity was observed to be constant upto 45 min. The Stern-Volmer calibration plot of F 0 /F as a function of ciprofloxacin concentration was found to be linear in the range of 0.5-10 µg mL -1 with r² = 0.993. Under optimal experimental conditions, the method was found to be interference free. The percent relative standard deviation of the proposed method, calculated against method blank, was found to be 1.10%. The limit of detection (LOD) and the limit of quantitation (LOQ) for ciprofloxacin (signal to noise ratio 3:1 for LOD and 10:1 for LOQ) were calculated to be 0.15 and 0.50 μg mL -1 respectively. Average percent recoveries (±SD) obtained for spiked commercial formulations; ciprol and ciproquine, and serum and urine samples were found to be in the range of 92.2±1.8% to 99.5±1.5%, 90.5±1.2% to 96.7±1.4% and 94.0±1.2% to 98.5±1.4% respectively. The data evidently proves the potential of the proposed sensor QDs in biological analysis.

show abstract

“…However, reduced activity in visible light and the combination of photogenerated electron and hole pairs obstructs the large scale utilizations of these photocatalysts [26]. The modification with transition metal ion doping is highly important owing to lower noxious content, aqueous stability, improved surface area, economically feasible, biocompatible, and chemically inert character of QDs [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Photocatalytic Degradation of Fluoroquinolone Norfloxacin by Mn:ZnS Quantum Dots: Kinetic Study, Degradation Pathway and Influencing Factors

Patel¹,

Singh²,

Carabineiro

2020

Nanomaterials

View full text Add to dashboard Cite

Norfloxacin (NOFX), a broadly used fluoroquinolone antibiotic, has been a subject of great concern in the past few years due to its undesirable effect on human beings and aquatic ecosystems. In this study, novel Mn doped ZnS (Mn:ZnS) quantum dots (QDs) were prepared through a facile chemical precipitation method and used as photocatalysts for NOFX degradation. Prior to photodegradation experiments, morphological and optical parameters of the QDs were examined through transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, Brunauer–Emmett–Teller analysis, and differential thermal and thermogravimetric analyses. Mn:ZnS QDs exhibited excellent properties of photodegradation, not only under UV irradiation but also in sunlight, which induced NOFX to photodegrade. The utmost photodegradation efficiency was obtained under optimal conditions (25 mL of NOFX, 15 mg/L, pH 10, 60 min UV irradiation, 60 mgs QDs), adopting first order kinetics. In addition, hydroxyl radicals produced by the conduction band electrons were found to be the primary reason dominating the transformation of NOFX in basic conditions, while holes, oxygen atoms, as well as the doped metal (Mn) enhanced the degradation. The QDs showed excellent reusability and stability in four repeated cycles. Finally, four different pathways were predicted, derived from the identified intermediates, with piperazinyl ring transformation being the primary one. It is expected that the synthesized Mn:ZnS QDs could be utilized as efficient photocatalytic materials for energy conversion and ecological remediation.

show abstract

Photoluminescence sensing of bilirubin in human serum using l-cysteine tailored manganese doped zinc sulphide quantum dots

Cited by 53 publications

References 41 publications

Biosensors Based on Advanced Sulfur-Containing Nanomaterials

Biosensors Based on Advanced Sulfur-Containing Nanomaterials

Mn-DOPPED ZnS QUANTUM DOTS AS SENSITIVE SENSOR FOR DETERMINATION OF CIPROFLOXACIN IN PHARMACEUTICAL AND BIOLOGICAL SAMPLES

Assessing the Photocatalytic Degradation of Fluoroquinolone Norfloxacin by Mn:ZnS Quantum Dots: Kinetic Study, Degradation Pathway and Influencing Factors

Contact Info

Product

Resources

About