| AVS 64th International Symposium & Exhibition | |
| Biomaterial Interfaces Division | Tuesday Sessions |
| Session BI-TuP |
| Session: | Biomaterial Interfaces Poster Session with Flash presentations |
| Presenter: | Camilo Jaramillo, University of Illinois at Urbana-Champaign |
| Authors: | C. Jaramillo, University of Illinois at Urbana-Champaign A.R. Shetty, University of Illinois at Urbana-Champaign A.F. Civantos, University of Illinois at Urbana-Champaign S.L. Arias, University of Illinois at Urbana-Champaign J.C. Devorkin, University of Illinois at Urbana-Champaign S. Chang, Nanjing University of Aeronautics and Astronautics, China J.P. Allain, University of Illinois at Urbana-Champaign |
| Correspondent: | Click to Email |
Plasma technology has seen an increased demand in nanotechnology, because of the changes in chemistry and morphology it can induce. These capabilities enable novel applications in a wide range of areas from advanced optical components to biomaterials [1]. Traditional plasma-based techniques work in low-pressure controlled environments. Compared to vacuum-based systems, atmospheric-pressure plasma (APP) systems offer reduced costs (e.g. no vacuum needed), higher reaction rates due to their high neutral-particle component and low-temperature treatment of polymer-based materials [2]. In addition, for specialized applications such as biology or catalysis, APP can offer treatment under gaseous or aqueous environments. One weakness of APP is the difficulty in controlling the coupled ion-neutral species and in turn high-fidelity modification of materials. One alternative to APP is the ability to tailor surface properties by careful control of species in the liquid plasma-material interface resulting in manipulation of nanostructured surface properties. Directed liquid-plasma nano-synthesis (DLPNS) is used in this work as the basis for systematic studies on the synthesis of silver nanoparticles (Ag NPs) in aqueous solution with DLPNS compared to in-vacuum directed plasma nanosynthesis (DPNS) on natural hydrogel matrices. Silver NPs are important for antimicrobial applications due to their unique antibacterial properties [3], but they also possess cytotoxic properties, making them harmful to human tissues [4]. Chitosan (CS) is a biodegradable, biocompatible and non-toxic natural biopolymer, which has been studied due to its antimicrobial properties [5]. DLPNS was used to treat Ag and Ag/CS solutions, driving NPs synthesis and surface nanopatterning. Surface morphology and composition were studied with SEM and EDS, respectively. Ambient-pressure in-situ XPS was used to measure irradiation-induced chemistry changes of CS. The antimicrobial properties of synthesized Ag NPs and nanostructured CS was systematically studied with control parameters such as energy and fluence. Notable transformation of the hydrogels was achieved, with self-organized pillar structures and porous structures produced on CS.
[1] J.P. Allain, A. Shetty, J. Phys. D Appl. Phys 50 (2017).
[2] R. Foest, E. Kindel, A. Ohl, M. Stieber, K.-D. Weltmann, Plasma Phys. Control. Fusion 47 (2005) B525–B536.
[3] B. Le Ouay, F. Stellacci, Nano Today 10 (2015) 339–354.
[4] P. Dubey, I. Matai, S.U. Kumar, A. Sachdev, B. Bhushan, P. Gopinath, Adv. Colloid Interface Sci. 221 (2015) 4–21.
[5] I. Bano, M. Arshad, T. Yasin, M.A. Ghauri, M. Younus, Int. J. Biol. Macromol. 102 (2017) 380–383.