@article{GoldhahnSchubertSchlaadetal.2018,
  author    = {Goldhahn, Christian and Schubert, Jonas and Schlaad, Helmut and Ferri, James K. and Fery, Andreas and Chanana, Munish},
  title     = {Synthesis of Metal@Protein@Polymer Nanoparticles with Distinct Interfacial and Phase Transfer Behavior},
  series = {Chemistry of materials : a publication of the American Chemical Society},
  volume    = {30},
  journal   = {Chemistry of materials : a publication of the American Chemical Society},
  number    = {19},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {0897-4756},
  doi       = {10.1021/acs.chemmater.8b02314},
  pages     = {6717 -- 6727},
  year      = {2018},
  abstract  = {In this study, we present a novel and facile method for the synthesis of multiresponsive plasmonic nanoparticles with an interesting interfacial behavior. We used thiol-initiated photopolymerization technique to graft poly(N-isopropylacrylamide) onto the surface of protein-coated gold nanoparticles. The combination of the protein bovine serum albumin with the thermoresponsive polymer leads to smart hybrid nanoparticles, which show a stimuli-responsive behavior of their aggregation and a precisely controllable phase transfer behavior. Three interconnected stimuli, namely, temperature, ionic strength, and pH, were identified as property tuning switches. The aggregation was completely reversible and was quantified by determining Smoluchowski's instability ratios with time-resolved dynamic light scattering. The tunable hydrophobicity via the three stimuli was used to study interfacial activity and phase transfer behavior of the nanoparticles at an octanol/water interface. Depending on the type of coating (i.e., protein or protein/polymer) as well as the three external stimuli, the nanoparticles either remained in the aqueous phase (aggregated or nonaggregated), accumulated at the oil/water interface, wet the glass wall between the glass vial and the octanol phase, or even crossed the oil/water interface. Such smart and interfacially active nanoparticles with external triggers that are capable of crossing oil/water interfaces under physiological conditions open up new avenues for a variety of applications ranging from the development of drug-delivery nanosystems across biological barriers to the preparation of new catalytic materials.},
  language  = {en}
}
@article{CramerGambinossiWischerhoffetal.2015,
  author    = {Cramer, Ashley D. and Gambinossi, Filippo and Wischerhoff, Erik and Laschewsky, Andr{\´e} and Miller, Reinhard and Ferri, James K.},
  title     = {Flexible thermoresponsive nanomembranes at the aqueous-air interface},
  series = {Chemical communications},
  volume    = {51},
  journal   = {Chemical communications},
  number    = {5},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1359-7345},
  doi       = {10.1039/c4cc07359b},
  pages     = {877 -- 880},
  year      = {2015},
  abstract  = {A synthetic pathway is described to construct thermoresponsive freestanding nanomembranes at the aqueous-air interface of a pendant drop. Dynamic control of the reaction kinetics allows formation of viscoelastic interfaces supporting anisotropic stresses and mechanical stability, which can be tuned by external stimuli.},
  language  = {en}
}
@article{GambinossiSefcikWischerhoffetal.2015,
  author    = {Gambinossi, Filippo and Sefcik, Lauren S. and Wischerhoff, Erik and Laschewsky, Andr{\´e} and Ferri, James K.},
  title     = {Engineering Adhesion to Thermoresponsive Substrates: Effect of Polymer Composition on Liquid-Liquid-Solid Wetting},
  series = {ACS applied materials \& interfaces},
  volume    = {7},
  journal   = {ACS applied materials \& interfaces},
  number    = {4},
  publisher = {American Chemical Society},
  address   = {Washington},
  issn      = {1944-8244},
  doi       = {10.1021/am507418m},
  pages     = {2518 -- 2528},
  year      = {2015},
  abstract  = {Adhesion control in liquidliquidsolid systems represents a challenge for applications ranging from self-cleaning to biocompatibility of engineered materials. By using responsive polymer chemistry and molecular self-assembly, adhesion at solid/liquid interfaces can be achieved and modulated by external stimuli. Here, we utilize thermosensitive polymeric materials based on random copolymers of di(ethylene glycol) methyl ether methacrylate (x = MEO(2)MA) and oligo(ethylene glycol) methyl ether methacrylate (y = OEGMA), that is, P(MEO(2)MA(x)-co-OEGMA(y)), to investigate the role of hydrophobicity on the phenomenon of adhesion. The copolymer ratio (x/y) dictates macromolecular changes enabling control of the hydrophilic-to-lipophilic balance (HBL) of the polymer brushes through external triggers such as ionic strength and temperature. We discuss the HBL of the thermobrushes in terms of the surface energy of the substrate by measuring the contact angle at waterdecaneP(MEO(2)MA(x)-co-OEGMA(y)) brush contact line as a function of polymer composition and temperature. Solid supported polyelectrolyte layers grafted with P(MEO(2)MA(x)-co-OEGMA(y)) display a transition in the wettability that is related to the lower critical solution temperature of the polymer brushes. Using experimental observation of the hydrophilic to hydrophobic transition by the contact angle, we extract the underlying energetics associated with liquidliquidsolid adhesion as a function of the copolymer ratio. The change in cellular attachment on P(MEO(2)MA(x)-co-OEGMA(y)) substrates of variable (x/y) composition demonstrates the subtle role of compositional tuning on the ability to control liquidliquidsolid adhesion in biological applications.},
  language  = {en}
}