Gold nanoparticles as colorimetric probes in food analysis: Progress and challenges

Nanomaterial-based probes for iodide sensing: synthesis strategies, applications, challenges, and solutions

“…• Interference by testing conditions: NPs have excellent colorimetric properties, but they are susceptible to variations in testing conditions, including temperature, pH, salinity, and sample redox features, which may lead to alterations in their dimensions, form, or dispersion state, potentially resulting in inaccurate results such as false positives or negatives. 136…”

“…• Calibrating NP-based sensors according to the test conditions can lead to accurate calibration curves and reliable results. 136…”

Nanoparticles for efficient drug delivery and drug resistance in glioma: New perspectives

“…They can also be used as catalysts to speed up chemical reactions and as bioimaging agents to image cells and tissues. 156 , 157 , 158 Furthermore, methods for the preparation of AuNPs are constantly being improved and refined. For example, monodisperse and highly concentrated AuNPs can be prepared using seed growth methods, and the size and shape of the particles can be controlled by changing the reaction conditions.…”

Recent advancements in nanomaterial based optical detection of food additives: a review

“…Metal nanoparticles, particularly gold nanoparticles (GNPs), have been widely used in the development of colorimetric sensors for the detection of a variety of food additives owing to their ease of production, excellent biocompatibility, and durability. 107–110 Furthermore, GNPs have the unusual property of changing color when agglomerated, allowing for straightforward analyte identification. Such a property of GNPs has been demonstrated for the colorimetric detection of melamine (non-protein nitrogen source to boost milk protein value) in various milk samples.…”