Break Through in the Nutrition and Health

In Nutrition and Health, Food safety has become one of the vital factors for the enrichment and quality of the food that is being developed these days. Small peptides and toxins can largely affect the food materials by disrupting the receptors or the enzymes present. This can affect in either form, such as internal or external forms. In order to avoid these contaminations and diseases, food safety management has developed various detection techniques which are capable of detecting various toxins and chemicals. Although, the factors such as sensitivity, specificity, etc is being detected by using the Atomic Force Microscopy. It is one of the widest nanotechnologies for imaging and measurements in biophysics and biology. Its high sensitivity in probing specific, single-molecule binding between molecules is applicable to food toxin detection.
Elevating the ability to evaluate food quality and safety in a rapid, sensitive and reliable manner is of great importance in food industry. Recently, gold nanoparticles due to unique optical property ease of functionalization and preparation, and high selectivity and sensitivity have received considerable attention in the field of food safety. Gold nanoparticles exhibit distinguishable optical characteristic in different aggregated states and thus have been developed into simple colorimetric sensors for the quick detection of chemical contaminants in food samples. Herein, we reviewed the current methods for synthesis and functionalization of gold nanoparticles, strategies for fabrication of gold nanoparticle-based colourimetric sensors and their applications in the rapid analysis of food contaminant. Moreover, the inherent optical property of gold nanoparticles and their detecting principle have been highlighted. Finally, the main challenges and future efforts in developing such colorimetric sensors for food contaminants detection were discussed. Gold nanoparticles as smart colorimetric sensors conform to the requirement of modern analysis, such as high selectivity, sensitivity, simplicity, celerity, and portability. Thus, they have great potential to be applied as power sensing tools for food safety screening.



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