Electrochemical Redox of PEDOT-Coated Core-Shell Silica Spheres Stabilized in a PEG-Based Hydrogel Maxtrix: Modulation of the Optical Properties by Doping with Various Oxidative Mediators

Norton, Jamie C. Sharp; Han, Moon Gyu; Creager, Stephen E.; Foulger, Stephen H.

doi:10.1016/s1452-3981(23)13983-6

Cited by 7 publications

References 32 publications

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Preparation and Characterization of Carbon Nano‐Onion/PEDOT:PSS Composites

et al. 2012

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Composites of unmodified or oxidized carbon nano-onions (CNOs/ox-CNOs) with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) are prepared with different compositions. By varying the ratio of PEDOT:PSS relative to CNOs, CNO/PEDOT:PSS composites with various PEDOT:PSS loadings are obtained and the corresponding film properties are studied as a function of the polymer. X-ray photoelectron spectroscopy characterization is performed for pristine and ox-CNO samples. The composites are characterized by scanning and transmission electron microscopy and differential scanning calorimetry studies. The electrochemical properties of the nanocomposites are determined and compared. Doping the composites with carbon nanostructures significantly increases their mechanical and electrochemical stabilities. A comparison of the results shows that CNOs dispersed in the polymer matrices increase the capacitance of the CNO/PEDOT:PSS and ox-CNO/PEDOT:PSS composites.

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Preparation and Characterization of Carbon Nano‐Onion/PEDOT:PSS Composites

et al. 2012

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Investigation of the torsional barrier of EDOT using molecular mechanics and DFT methods

et al. 2014

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When heterocyclic monomers are polymerized by electrochemical or chemical methods, they form fully conjugated polymers which have a wide range of applications due to their outstanding electronic properties. Among this class of compounds, thiophene derivatives are widely used due to their chemical stability and synthesis flexibility. With the goal to investigate the torsion barrier of polymer chains, a few units of 3,4-ethylenedioxythiophene (EDOT) were chosen and submitted to molecular mechanics (MM), density functional theory (DFT) and coupled cluster CCSD(T) calculations. This study helps to understand the performance and transferability of force fields used in molecular mechanics and molecular dynamics simulations often used to describe structure-property relationships of those systems. Determination of inter-ring torsion angle was performed in a comparative study using both force field, DFT and CCSD(T) methods. A good agreement was noticed between MM and QC results and highlights the importance of the description of the interactions involving the oxygen atoms present in the structure of EDOT. These observations are related to the α,α-coupling that occurs between the monomer units and yields a linear polymer. DFT HOMO and LUMO orbitals were also presented. Finally, UV-vis spectra of EDOT units were obtained using several levels of theory by means of time-dependent DFT calculations (TD-DFT).

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Colloidal Self-Assembly Approaches to Smart Nanostructured Materials

2021

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Colloidal self-assembly refers to a solution-processed assembly of nanometer-/micrometer-sized, well-dispersed particles into secondary structures, whose collective properties are controlled by not only nanoparticle property but also the superstructure symmetry, orientation, phase, and dimension. This combination of characteristics makes colloidal superstructures highly susceptible to remote stimuli or local environmental changes, representing a prominent platform for developing stimuli-responsive materials and smart devices. Chemists are achieving even more delicate control over their active responses to various practical stimuli, setting the stage ready for fully exploiting the potential of this unique set of materials. This review addresses the assembly of colloids into stimuli-responsive or smart nanostructured materials. We first delineate the colloidal self-assembly driven by forces of different length scales. A set of concepts and equations are outlined for controlling the colloidal crystal growth, appreciating the importance of particle connectivity in creating responsive superstructures. We then present working mechanisms and practical strategies for engineering smart colloidal assemblies. The concepts underpinning separation and connectivity control are systematically introduced, allowing active tuning and precise prediction of the colloidal crystal properties in response to external stimuli. Various exciting applications of these unique materials are summarized with a specific focus on the structure–property correlation in smart materials and functional devices. We conclude this review with a summary of existing challenges in colloidal self-assembly of smart materials and provide a perspective on their further advances to the next generation.

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Electrochemical Redox of PEDOT-Coated Core-Shell Silica Spheres Stabilized in a PEG-Based Hydrogel Maxtrix: Modulation of the Optical Properties by Doping with Various Oxidative Mediators

Cited by 7 publications

References 32 publications

Preparation and Characterization of Carbon Nano‐Onion/PEDOT:PSS Composites

Preparation and Characterization of Carbon Nano‐Onion/PEDOT:PSS Composites

Investigation of the torsional barrier of EDOT using molecular mechanics and DFT methods

Colloidal Self-Assembly Approaches to Smart Nanostructured Materials

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