Characterization to Estimate the Size of Gold Nanoparticles Deposited in Pregnancy Tests Using Diffuse Reflectance Spectroscopy
When using a pregnancy test, a urine sample is deposited in one side of the nitrocellulose strip, which moves by capillary action to the other side of the test, where there are immobilized particles or biomarkers that indicate a positive or negative test result. Based on the manufacturer’s data sheet, these are usually colloidal gold […]
