Silver has long been used as an antibacterial, antifungal, and antiviral agent because, while being very toxic towards microorganisms, it is much less toxic to humans [3]. However, antimicrobial agents such as silver nitrate are easily inactivated by complexation and precipitation and thus have a limited usefulness [4]. Zerovalent silver nanoparticles (AgNPs) are considered a valuable alternative to ionic silver. AgNPs have antimicrobial activity towards a broad spectrum of Gram-negative and Gram-positive bacteria, fungi, and viruses [5], [6], [7] and [8]. Therefore, dressings coated with sputtered nanoscale silver have been used to reduce infections in burns [9] and [10], and AgNPs have been used as antimicrobials in air fresheners, water purifiers, food storage containers, and in coatings for clothing. Because of these myriad applications, AgNPs are presently the most used engineered nanomaterials.