@article{tomlinson_genzer_2008, title={Formation and properties of multivariant assemblies of surface-tethered diblock and triblock copolymers}, volume={49}, ISSN={["0032-3861"]}, DOI={10.1016/j.polymer.2008.08.048}, abstractNote={We present methodologies for fabricating block copolymer assemblies grafted onto flat solid substrates, where each block of the copolymer possesses a systematic and gradual variation of molecular weight as a function of the position on the substrate. We demonstrate the utility of this technique on two case studies. In the first project, we generate surface-tethered poly[(2-hydroxyethyl methacrylate)-b-(methyl methacrylate)] (PHEMA-b-PMMA) diblock copolymer brushes and study systematically morphological transitions associated with collapsing either the top PMMA or the bottom PHEMA block while keeping the other block solvated. Scanning force microscopy studies of systems having the top block collapsed reveal the presence of either flat (F), or micellar (M) or bicontinuous (BC) morphologies, whose locus in the phase diagram agrees with theoretical predictions and results of computer simulations. The second case study demonstrates the extension of the deposition method to the case of surface-anchored triblock copolymer brushes. Specifically, we present results pertaining to the formation of poly[(2-hydroxyethyl methacrylate)-b-(methyl methacrylate)-b-(dimethylaminoethyl methacrylate)] brushes with independent variation of all three block lengths.}, number={22}, journal={POLYMER}, author={Tomlinson, Michael R. and Genzer, Jan}, year={2008}, month={Oct}, pages={4837–4845} }
 @article{tomlinson_efimenko_genzer_2006, title={Study of kinetics and macroinitiator efficiency in surface-initiated atom-transfer radical polymerization}, volume={39}, ISSN={["0024-9297"]}, DOI={10.1021/ma061885n}, abstractNote={Generation of surface-tethered block copolymer brushes with well-defined physicochemical characteristics requires achieving good control over the degree of polymerization of each block of the copolymer. In order to precisely form these block copolymer layers, one must (1) utilize a polymerization scheme that is capable of generating nearly monodisperse polymers, (2) fully characterize the kinetics of surface-initiated polymerization, and (3) produce macroinitiators with living characteristics capable of reinitiating the growth of each subsequent block. In this work, we describe technological steps leading to the controlled growth of surface-tethered homopolymers and multiblock copolymers via surface-initiated atom transfer radical polymerization (ATRP) from flat substrates. We first report on investigating the ability of a macroinitiator to reinitiate a homopolymer brush. We use computer simulations to illustrate the advantages of an “added deactivator” type ATRP over the traditional “sacrificial initiato...}, number={26}, journal={MACROMOLECULES}, author={Tomlinson, Michael R. and Efimenko, Kirill and Genzer, Jan}, year={2006}, month={Dec}, pages={9049–9056} }
 @article{bhat_tomlinson_wu_genzer_2006, title={Surface-grafted polymer gradients: Formation, characterization, and applications}, volume={198}, ISBN={["3-540-30251-4"]}, ISSN={["1436-5030"]}, DOI={10.1007/12_060}, journal={SURFACE- INITIATED POLYMERIZATION II}, publisher={Berlin; New York: Springer}, author={Bhat, Rajendra R. and Tomlinson, Michael R. and Wu, Tao and Genzer, Jan}, year={2006}, pages={51–124} }
 @article{tomlinson_genzer_2005, title={Evolution of surface morphologies in multivariant assemblies of surface-tethered diblock copolymers after selective solvent treatment}, volume={21}, ISSN={["0743-7463"]}, DOI={10.1021/la051523t}, abstractNote={We study systematically the topography behavior of PHEMA-b-PMMA block as a function of the PHEMA and PMMA block lengths after selectively collapsing the top (PMMA) block by using surface-anchored assemblies of poly(2-hydroxyethyl methacrylate-b-methyl methacrylate), PHEMA-b-PMMA, block copolymer with orthogonally varying lengths of each block. Our experimental results are in excellent qualitative agreement with topology diagrams predicted by self-consistent field calculations of Zhulina and co-workers.}, number={25}, journal={LANGMUIR}, author={Tomlinson, MR and Genzer, J}, year={2005}, month={Dec}, pages={11552–11555} }
 @article{bhat_tomlinson_genzer_2005, title={Orthogonal surface-grafted polymer gradients: A versatile combinatorial platform}, volume={43}, ISSN={["1099-0488"]}, DOI={10.1002/polb.20640}, abstractNote={AbstractOrthogonal polymer brush gradients are assemblies of surface‐anchored macromolecules, in which two material properties of the grafted chains (e.g., grafting density, molecular weight) vary independently in orthogonal directions. Here, we describe the formation and applications of two such orthogonal assemblies, involving: (1) molecular weight and grafting density (MW/σ) gradients of a given polymer and (2) molecular weight gradients (MW1/MW2), of two different polymers. Each point on orthogonal gradient substrate represents a unique combination of the two surface properties being varied, thus facilitating systematic investigation of a phenomenon that depends on the two said properties. We illustrate this point by employing orthogonal structures to study systematically: (1) formation of polymer brush‐nanoparticle composite assemblies, (2) protein adsorption and cell adhesion, and (3) chain conformations in tethered diblock copolymers exposed to selective solvents. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 3384–3394, 2005}, number={23}, journal={JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS}, author={Bhat, RR and Tomlinson, MR and Genzer, J}, year={2005}, month={Dec}, pages={3384–3394} }
 @article{wu_tomlinson_efimenko_genzer_2003, title={A combinatorial approach to surface anchored polymers}, volume={38}, ISSN={["1573-4803"]}, DOI={10.1023/A:1027373216389}, number={22}, journal={JOURNAL OF MATERIALS SCIENCE}, author={Wu, T and Tomlinson, M and Efimenko, K and Genzer, J}, year={2003}, month={Nov}, pages={4471–4477} }
 @article{bhat_tomlinson_genzer_2004, title={Assembly of nanoparticles using surface-grafted orthogonal polymer gradients}, volume={25}, ISSN={["1521-3927"]}, DOI={10.1002/marc.200300163}, abstractNote={AbstractSummary: We report on preparing poly(2‐(dimethylamino)ethyl methacrylate) (PDMAEMA) gradient substrate, wherein molecular weight (MW) and grafting density (σ) of the surface‐anchored PDMAEMA chains vary continuously in two orthogonal directions. Such a specimen is used to control the assembly of charged gold nanoparticles. Increasing MW and σ of the grafted PDMAEMA cause an enhanced binding of the nanoparticles to PDMAEMA, thus leading to an orthogonal number density gradient of surface‐bound gold nanoparticles.magnified image}, number={1}, journal={MACROMOLECULAR RAPID COMMUNICATIONS}, author={Bhat, RR and Tomlinson, MR and Genzer, J}, year={2004}, month={Jan}, pages={270–274} }