Development and characterization of nanosilver loaded test materials using surface and bulk analytical techniques

JM. Gorham, R.D. Holbrook, K. Murphy, G. Stan, D. Tselenchuk, J. Liu, M. Windchester, R.I. MacCuspie
National Institute of Standards and Technology, US

Keywords: silver nanoparticles, textiles, characterization

Summary:

Engineered nanomaterials, such as silver nanoparticles, have been widely incorporated into commercial products (e.g. socks, bandages, surface coatings) due to their antimicrobial properties. However, characterization of these materials, either when pristine or after aging can be challenging due to the number of unknowns associated with their composition. In an attempt to instruct our efforts in characterizing silver nanomaterial containing commercial textiles, we have developed a series of silver nanoparticle loaded threads as test samples. These threads were prepared at five different silver nanoparticle concentrations via chemical reduction techniques. After preparation, the morphology of the nanoparticle loaded threads were characterized utilizing microscopy, including atomic force microscopy (AFM) and scanning electron microscopy (SEM). Additionally, elemental and chemical analysis was explored employing X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and inductively coupled plasma mass spectrometry (ICP-MS). Results presented will demonstrate the applicability of employing these techniques in characterizing the silver nanoparticle loaded threads and, by extension, in other textiles.