Preventing the coffee-ring effect and aggregate sedimentation by in situ gelation of monodisperse materials

Abstract

Microscale uniformity and long-range cohesion in multi-functional films assembled through drop-casting is realized by in situ gelation of monodisperse building blocks.

The electron as a probe to measure the thickness distributions of electroactive films

“…As an experimental example showing the usefulness of the electroanalytical approach, as well as its complementarity with AFM, both methods were applied for the characterization of redox-active films assembled from viologen modified macromolecules. We compare previously reported data 20 for smooth films ( Fig. 4 ) assembled from the drop-casting of viologen-modified dendrimers ( Fig.…”

“…A variety of confocal or atomic force microscopy (AFM) methods exist to characterize film morphology. 20 However, these methods are often too complex for routine implementation or deliver only partial information. For instance, AFM is often applied, but only yields the top roughness of the sampled fraction of the film.…”

Suppressing hydrogen peroxide generation to achieve oxygen-insensitivity of a [NiFe] hydrogenase in redox active films

“…Confocal fluorescence images were generated as a depth profile ( Fig. 2) with the intensities corresponding to the local concentrations of fluorophores 4 . At open circuit potential fluorescence was observed upon excitation of the viologen moieties (top panel in Fig.…”

“…edox-active polymer films applied as electron-conducting matrices for the immobilization of biological and bioinspired catalysts on electrodes provide a practical route for their use in processes such as energy conversion. Recent reports demonstrated the effective integration of enzymes such as hydrogenases [1][2][3][4] , nitrogenase 5 , formate dehydrogenase 6 , and photosystems [7][8][9][10][11] as well as molecular catalysts [12][13][14] in redox matrices on electrode surfaces. Since many of these catalysts are sensitive to O 2 to the extent that they deactivate within seconds under aerobic conditions 15 , the polymer films were further engineered as protection matrices to avoid oxidative deactivation [1][2][3]6,9,16 .…”

Inkjet‐Printed Micrometer‐Thick Patterned Perovskite Quantum Dot Films for Efficient Blue‐to‐Green Photoconversion

“…Solute particles are displaced to the three‐phase contact line by the generated capillary flows within the drop. As a result, particle accumulation at the dry film boundaries is accelerated and a coffee ring is formed . To minimize such coffee‐ring effect, thermal‐curing‐type ink with high boiling point and large viscosity is usually adopted in organic electroluminescent devices.…”