Gold nanoparticle-based colorimetric detection of kanamycin using a DNA aptamer

Signaling-Probe Displacement Electrochemical Aptamer-based Sensor (SD-EAB) for Detection of Nanomolar Kanamycin A

“…As the discovery of anti-kanamycin A aptamers, several aptamer-based kanamycin A biosensors including colorimetric [15,16], fluorescent [17], luminescent [18], and electrochemical sensors [19][20][21] have been recently reported (Table 1). However, these sensors have some of the following problems that limit their practical applications: narrow dynamic range [15,[17][18][19][20][21], complicated sensor preparation process [20,21], or requirement of enzymatic reactions for signal amplification [16].…”

Highly sensitive colorimetric sensor for Hg2+ detection based on cationic polymer/DNA interaction

“…According to previous reports, in comparison to salt, PDDA is highly efficient in inducing the aggregation of AuNPs (Song et al, 2011;Zheng et al, 2011), and, in particular, can interact with ssDNA via electrostatic attractions (Ofir et al, 2008;Peng et al, 2006). In this paper, we demonstrate the first use of PDDA instead of salt to develop a colorimetric sensor for the ultrasensitive and selective detection of Hg 2 þ .…”

Nanomaterials for analysis and monitoring of emerging chemical pollutants

“…Such a protection agent should be able to bind specifically with the anlayte and dissociate from the AuNPs, thereby allowing aggregation of AuNPs induced by salt (along with the colloid color changing from red to blue). This mechanism has been adopted in detecting BPA [119,120], oxytetracycline [121], kanamycin [122], and perfluorooctanoic acid (PFOA) [123] in water samples.…”