Supplementary material
Covalent Assembly of Metal Nanoparticles on Cellulose Fabric and Its Antimicrobial Activity
Sung Yong Park,1 Jae Woo Chung,2,3 Rodney D. Priestley,2 Seung-Yeop Kwak1,*
1Department of Materials Science and Engineering, Seoul National University,
599 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea
2Department of Chemical and Biological Engineering, Princeton University,
Princeton, New Jersey 08544, USA
3Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Dunsan-ri, Bongdong-eup, Wanju-gun, Jeollabuk-do 864-9, Korea
*Corresponding Author: S.-Y. Kwak
(Tel: +82-2-880-8365, Fax: +82-2-880-1748, e-mail: )
Fig. S1. HR-TEM images of (a) Ag and (b) Pd nanoparticles. Both nanoparticles show the spherical in morphology with size below 10 nm. (Park et al. 2011)
Table S1. Sulfur contents in the fabric specimens detected by elemental analysis (EA)
Samples / Carbon (wt%) / Hydrogen (wt%) / Sulfur (wt%)Neat cotton fabric / 43.4 / 5.9 / -
Thiol-modified cotton fabric / 42.1 / 5.8 / 2.1
Fig. S2. The photo images of the fabric after immersion of the non-thiol modified cellulose fabric, i.e., neat cellulose, in (a) the Ag- and (b) the Pd nanoparticle colloidal solutions
Preparation of metal nanoparticle/cellulose fabric mixture (metal/cellulose) without covalent bond
We prepared the metal nanoparticle/cellulose fabric mixture without covalent bond between the metal nanoparticles and the cellulose fabric (denoted as metal/cellulose) using in-situ nanoparticle synthesis method in the cellulose fabric (He et al. 2003), as a counterpart of metal-cellulose with covalent bond. Briefly, the metal precursor were impregnated into non-thiolated cellulose, i.e., neat cellulose, fabric by immersing them in 1 mM of AgNO3 or Na2PdCl4 aqueous solution for 1 min, followed by rinsing with ethanol for 5 min. The precursors in the fabric were reduced in 200 mM of NaBH4 aqueous solution for 10 min and then rinsed in deionized water. The obtained fabric specimens were wiped with soft tissue and dried at 40 °C in the same manner as the metal-cellulose drying process.
References
He J, Kunitake T, Nakao A (2003) Facile In Situ Synthesis of Noble Metal Nanoparticles in Porous Cellulose Fibers. Chem Mater 15 (23):4401-4406. doi:10.1021/cm034720r
Park SY, Ryu S-Y, Kwak S-Y (2011) Antibacterial Metal-Fiber Hybrid with Covalent Assembly of Silver and Palladium Nanoparticles on Cellulose Fibers. In: 2010 International Conference on Biology, Environment and Chemistry, Hong Kong, 12. 28-30. 2010. 2011. IPCBEE, pp 183-186
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