One step synthesis of functionalized carbon dots for the ultrasensitive detection of Escherichia coli and iron (III)
| Autor: | Triveni Kumar Mahto, Balaram Das, Sumanta Kumar Sahu, Soumen Chandra, Angshuman Ray Chowdhuri |
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| Rok vydání: | 2017 |
| Předmět: |
Analytical chemistry
02 engineering and technology Conjugated system 010402 general chemistry medicine.disease_cause 01 natural sciences Solid-phase synthesis Tap water polycyclic compounds Materials Chemistry medicine Electrical and Electronic Engineering Instrumentation Escherichia coli Polypeptide antibiotic Detection limit Chemistry Metals and Alloys biochemical phenomena metabolism and nutrition equipment and supplies 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Linear range Colistin bacteria lipids (amino acids peptides and proteins) 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | Sensors and Actuators B: Chemical. 245:835-844 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2017.02.017 |
| Popis: | In this paper, we report a single step solid phase synthesis strategy for colistin modified fluorescent carbon dots (CDs@colistin) for the selective detection of gram-negative bacteria like Escherichia coli . Colistin is a well known cyclic polypeptide antibiotic drug but here we have used as a binding ligand for E. coli. Here also, the synthesised CDs@colistin are used for selective Fe 3+ metal ion detection. The detection limits are 460 cfu/mL for E. coli and 56 nM for Fe 3+ with a linear range of 3.81 × 10 2 –2.44 × 10 4 cfu/mL and 0–48 μM, respectively. The synthesised CDs@colistin are well dispersed in water with an uniform particle size ranging from 2 nm to 5 nm executing high quantum yield of 7.56%. The synthesis process of CDs@colistin is simple, cheap, and less time consuming. Simultaneously, we have applied CDs@colistin as a novel probe for E. coli detection in three different real samples like human urine, apple juice, and tap water to evaluate the practical applicability of the synthesised colistin conjugated carbon dots. |
| Databáze: | OpenAIRE |
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