Ultra-fast and probe-free cellulose biosensor for visual detection of Cu2+ ions in biological samples

Nanobioengineered Sensing Technologies Based on Cellulose Matrices for Detection of Small Molecules, Macromolecules, and Cells

“…Copper ion (Cu 2+ ) plays a significant role in different physiological processes, excess of which causes liver and kidney damage, and which is one of the frequently occurring ions causing the contamination of drinking water. A cellulose-based biosensor has been developed for the unaided detection of Cu 2+ ions present in biological fluids by Wang et al, 2019 [ 69 ]. The biosensor was fabricated without the requirement of the probe using natural cellulose through a facile one-pot process, and structural characterization was carried out by Fourier transform infrared spectroscopy (FTIR).…”

“…( D ) Pictorial representation of the development of CTAB-NCC/MPA-QDs/Tyr sensor through immobilization of CTAB-NCC/QDs on SPCE (screen-printed carbon electrode) and further with Tyr enzyme for the detection of phenol and response evaluated using DPV (reproduced with permission from [ 58 ]). ( E ) Fabrication scheme of DAC-PDH-based colorimetric sensor through chemical alteration and discriminatory identification of Cu 2+ by DAC-PDH within 30 s (reproduced with permission from [ 69 ]). ( F ) Preparation of DAC-Tu selective colorimetric sensor and the identification of Ag + from aqueous solutions according to color change based on the varying concentrations of Ag+ (reproduced with permission from [ 70 ]).…”

Synthesis of Nopinone-Based Quinazolin-2-amine Fluorescent Probe for Detection of Cu2+and Its Application Research

“…1 H NMR and 13 C NMR spectra were recorded in DMSO-d 6 /CDCl 3 solutions using a Bruker 400 spectrometer. Mass spectra was recorded on an America Agilent 5975c mass spectrometer (ESI).…”

“…[1][2][3][4][5][6][7] Among them, the fluorescent probes for the de-tection of Cu 2＋ with an excellent sensitivity and selectivity obtained researchers' attention in particular. [8][9][10][11][12][13][14] Copper was the third most abundant metal ranking second to aluminum and iron, and widely distributed in water and soil environments in the ionic state. As a kind of common and deleterious heavy metal, copper was widely applied in industrial, agricultural, and domestic fields owing to its excellent conductivity, thermal conductivity, and ductility, which results in heavy pollution to water and land environment.…”

Dye‐encapsulated nanocage‐based metal–organic frameworks as luminescent dual‐emitting sensors for selective detection of inorganic ions

“…Although there are many methods to detect metal ions currently, the application is limited due to the complexity and time-consuming. [12][13][14][15][16] Luminescent sensors have attracted wide attention for their distinct signal outputs, low cost, quick response, and high sensitivity. [17][18][19][20][21] Among them, luminescent metal-organic frameworks (LMOFs) can be used as a viable platform for the rapid and convenient detection of trace heavy metal ions on the basis of the advantages of large specific surface, high porosity, tunable structure and function.…”