Polymer: Poly(styrene)-block-Poly(4-vinyl pyridine)Example(s): PolyVivo AO24
*-structure shows actual material generated including RAFT control agent
Description: PS-P4VP and related block copolymers naturally self-assemble under the right conditions into a variety of nanostructures. Metal nanoparticles can be formed in-situ by these microdomains. PS-P4VP have been used to generate Au clusters, Co, and Fe arrays, and self-assembled Au and Fe2O3 nanoparticles (Yeh et. al., 2005).
This polymer is soluble in mixtures of DMF and water and the microdomains and assembled structures can be adjusted by fine-tuning the pH of the solution (http://dx.doi.org/10.1021/ja983712m) also it has been established that strong hydrogen bonding occurs between the 4-vinyl-pyrridine units and 3-n-pentadecylphenol which also alters its supramolecular structure (Ruokolainen, et. al. 1999). The supramolecular domain can also be altered using 2-(4′-hydroxybenzeneazo)benzoic acid (Tung, et. al. 2008).
Useful Full-text References:
(Yeh et. al., 2005) http://www.nsrrc.org.tw/www/eng/endstation/17b3/saxs/Publications/2005/39-%20Siao%20Wei%20Yei%2038%206559%202005%20macromolecule%20047653a-PS-P4VP-CdS.pdf
(Kosonen, et. al. 2002) http://zernike.eldoc.ub.rug.nl/FILES/root/2002/MacromolKosonen/2002MacromolKosonen.pdf
(Ruokolainen, et. al. 1999)
(Ekenstein, et.al. 2003)
(Valkama, et. al. 2006)
(Ikkala et. al. 2004)
(Tung, et. al. 2008).