Gold-nanoparticle-based colorimetric array for detection of dopamine in urine and serum

Simple, rapid, sensitive, selective and label-free lincomycin detection by using HAuCl4and NaOH

“…In the presence of Lin, Au may form coordination complexes with sulfur through the Au/S covalent interactions. 22,23 As shown in Fig. 3 and S3 (ESI †), the chelation interaction may happen between Lin and Au in solution.…”

A rapid and ultrasensitive colorimetric biosensor based on aptamer functionalized Au nanoparticles for detection of saxitoxin

“…15 The colorimetric sensor based on Au NPs has the advantages of high sensitivity and simplicity, and is capable of realizing real-time detection without large-scale instruments and equipment. It has been used to detect proteins, [16][17][18] DNAs, [19][20][21] metal ions, 22,23 and small molecules. [24][25][26][27] To construct Au NPs based colorimetric sensor, a specic molecule is needed to bind with Au NPs, which can specically react with target molecules, and then gets desorbed from Au NPs resulting in the aggregation of Au NPs to induce color change.…”

Simultaneous detection of dopamine, tyrosine and ascorbic acid using NiO/graphene modified graphite electrode

“…Though analytical methods like chro matography, fluorescence, mass spectrometry and other techniques are available for the detection of Tyr [19][20][21][22], DA [23][24][25][26][27][28][29][30][31] and AA [32][33][34][35][36][37][38] in biological fluids, they are useful to certain extent due to their own limitations. Owing to fast response, accuracy and portability, the electrochemical methods using electrochemical sensors [39] to analy ze the DA, AA and Tyr coexisting in biological flu id [40][41][42][43] are very promising in accurate quantification of these bio-molecu les.…”