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Schattling, Philipp,Jochum, Florian D.,Theato, Patrick Royal Society of Chemistry 2011 Chemical communications Vol.47 No.31
<P>We report on triple responsive polymers, exhibiting a distinct and reversible lower critical solution temperature in water that can be altered by light and redox stimuli, and we suggest their evaluation for molecular information processing.</P> <P>Graphic Abstract</P><P>Triple responsive polymers suitable for polymeric information processing are investigated, based on light-, redox- and temperature switches. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cc12652k'> </P>
Haberkorn, Niko,Nilles, Katja,Schattling, Philipp,Theato, Patrick Royal Society of Chemistry 2011 Polymer chemistry Vol.2 No.3
<P>A new route for the fabrication of polymeric nanorods with functional moieties <I>via</I> post-modification of reactive nanorods is described. To this end reactive nanorods with a homogenous and narrow size distribution were fabricated by utilizing an anodic aluminium oxide (AAO) template-assisted approach. The nanorods are based on activated pentafluorophenyl esters, to enable quantitative post-modification with amines under very mild reaction conditions yielding the corresponding functionalized amide. Post-modification with fluorescent dyes as well as the conversion into well-dispersed rod-shaped poly(<I>N</I>-isopropylacrylamide) (PNIPAM) hydrogels that exhibit a thermal-responsive phase transition was demonstrated. The platform of reactive nanorods provides the fabrication of various functional nanoobjects and may find application in research fields like drug delivery.</P> <P>Graphic Abstract</P><P>A new route for the fabrication of polymeric nanorods with functional moieties <I>via</I> post-modification of reactive nanorods based on activated pentafluorophenyl esters is described. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0py00314j'> </P>
Nanotube Friendly Poly(N-isopropylacrylamide)
Etika, Krishna C.,Jochum, Florian D.,Cox, Michael A.,Schattling, Philipp,Theato, Patrick,Grunlan, Jaime C. WILEY-VCH Verlag 2010 Macromolecular Rapid Communications Vol.31 No.15
<P>Poly(N-ispropylacrylamide) [PNIPAM] is a widely studied polymer for use in biological applications due to its lower critical solution temperature (LCST) being so close to the human body temperature. Unfortunately, attempts to combine carbon nanotubes (CNTs) with PNIPAM have been unsuccessful due to poor interactions between these two materials. In this work, a PNIPAM copolymer with 1 mol-% pyrene side group [p-PNIPAM] was used to produce a thermoresponsive polymer capable of stabilizing both single and multi-walled carbon nanotubes (MWNTs) in water. The presence of pyrene in the polymer chain lowers the LCST less than 4 °C and the interaction with nanotubes does not show any influence on LCST. Moreover, p-PNIPAM stabilized nanotubes show a temperature-dependent dispersion in water that allows the level of nanotube exfoliation/bundling to be controlled. Cryo-TEM images, turbidity, and viscosity of these suspensions were used to characterize these thermoresponsive changes. This ability to manipulate the dispersion state of CNTs in water with p-PNIPAM will likely benefit many biological applications, such as drug delivery, optical sensors, and hydrogels.</P><P> <img src='wiley_img_2010/10221336-2010-31-15-MARC201000170-gra001.gif' alt='wiley_img_2010/10221336-2010-31-15-MARC201000170-gra001'> </P> <B>Graphic Abstract</B> <P>Schematic of SWNT dispersion and bundling using thermoresponsive 1 mol-% pyrene functionalized poly(N-isopropyl acrylamide). At temperatures below the LCST, the polymer is soluble in water and assumes a more extended conformation, thereby providing steric hindrance for nanotube bundling. At higher temperatures, p-PNIPAM assumes a globular conformation resulting in decreased hindrance that results in nanotube bundling/networking. <img src='wiley_img_2010/10221336-2010-31-15-MARC201000170-content.gif' alt='wiley_img_2010/10221336-2010-31-15-MARC201000170-content'> </P>
Hans Schattle 한국사회학회 2010 韓國社會學 Vol.44 No.6
This article explores how the Samsung Children’s Museum in Seoul has attempted to translate to young children ideals related to social inclusion, cross-cultural engagement, international understanding and self-awareness in an exhibit titled: ‘Global Citizen: We are Peacemakers!’ and, in Korean, koma segye shimin (‘Little World Citizens’). While the exhibit provides only a partial rendering of the concepts of global citizenship now prominent in public discourse, its displays and activities interact with liberal understandings of citizenship that emphasize individualism and respect for diversity as well as civic republican understandings of citizenship that emphasize decision making among motivated and responsible citizens who trust each other to act in the best interests of a political community. By bringing the contents of the exhibit into dialogue with conceptions of citizenship and cosmopolitanism, the article also illustrates how the meaning of citizenship in the Republic of Korea is changing as the country gradually transitions into a more diverse society.