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Conjugates were measured by UV-Vis analysis to monitor the AuNP, AuNP-UBI, AgNP, and AgNP-UBI surface plasmon resonance band.
TEM images (see Figure 6(a)) clearly showed AuNP aggregates on the surface of the PS beads.
Various nanoparticle assays for a simple detection of [Hg.sup.2+] ions have recently been investigated using gold nanorods (AuNRs) [12], carbon nanoparticles (CNPs) [13], silver nanoparticles (AgNPs) [14], silver nanoprisms (AgNPRs) [15], and AuNPs [16-18].
Furthermore, the small band at approximately 400nm in the spectrum of AuNP PAH-curcumin corresponded to the characteristic absorption band of curcumin, indicating conjugation.
In Figures 4(c) and 4(d), we replace the water droplet with a droplet sourced from our 0.5 [micro]M AuNP solution.
Another optical method using AuNPs for miRNA detection used surface plasmon resonance (SPR) as the basis for measuring adsorption of miRNA onto the surface of AuNPs.
The unique physical and chemical properties of AuNPs have allowed various sensing platform to be developed with higher sensitivity and specificity (6).
Both 1.5% and 2wt% AuNP doped systems gave 100% degradation of 50 mL, 10 mg/L MO dye over 3 g/L catalyst for 2 h exposure to UV light.
Gold nanoparticles (AuNP) are now at the forefront of developments in chemistry, biology, and medicine.
Metal NPs such as gold (AuNP) and silver are applied to analysis and sensing, because of their unique plasmonic properties.