Engineering interface polarization
(Source: ScienceNOW)
Source: ScienceNOW - April 1, 2021 Category: Science Authors: Szuromi, P. Tags: Materials Science, Physics twis Source Type: news
Integrating form and function for design
(Source: ScienceNOW)
Source: ScienceNOW - April 1, 2021 Category: Science Authors: Vinson, V. Tags: Biochemistry, Materials Science twis Source Type: news
Designed proteins assemble antibodies into modular nanocages
Multivalent display of receptor-engaging antibodies or ligands can enhance their activity. Instead of achieving multivalency by attachment to preexisting scaffolds, here we unite form and function by the computational design of nanocages in which one structural component is an antibody or Fc-ligand fusion and the second is a designed antibody-binding homo-oligomer that drives nanocage assembly. Structures of eight nanocages determined by electron microscopy spanning dihedral, tetrahedral, octahedral, and icosahedral architectures with 2, 6, 12, and 30 antibodies per nanocage, respectively, closely match the corresponding c...
Source: ScienceNOW - April 1, 2021 Category: Science Authors: Divine, R., Dang, H. V., Ueda, G., Fallas, J. A., Vulovic, I., Sheffler, W., Saini, S., Zhao, Y. T., Raj, I. X., Morawski, P. A., Jennewein, M. F., Homad, L. J., Wan, Y.-H., Tooley, M. R., Seeger, F., Etemadi, A., Fahning, M. L., Lazarovits, J., Roederer, Tags: Biochemistry, Materials Science, Online Only r-articles Source Type: news
Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order
Chiral assemblies of plasmonic nanoparticles are known for strong circular dichroism but not for high optical asymmetry, which is limited by the unfavorable combination of electrical and magnetic field components compounded by strong scattering. Here, we show that these limitations can be overcome by the long-range organization of nanoparticles in a manner similar to the liquid crystals and found in helical assemblies of gold nanorods with human islet amyloid polypeptides. A strong, polarization-dependent spectral shift and the reduced scattering of energy states with antiparallel orientation of dipoles activated in assemb...
Source: ScienceNOW - March 25, 2021 Category: Science Authors: Lu, J., Xue, Y., Bernardino, K., Zhang, N.-N., Gomes, W. R., Ramesar, N. S., Liu, S., Hu, Z., Sun, T., de Moura, A. F., Kotov, N. A., Liu, K. Tags: Chemistry, Materials Science reports Source Type: news
Stabilizing black-phase formamidinium perovskite formation at room temperature and high humidity
The stabilization of black-phase formamidinium lead iodide (α-FAPbI3) perovskite under various environmental conditions is considered necessary for solar cells. However, challenges remain regarding the temperature sensitivity of α-FAPbI3 and the requirements for strict humidity control in its processing. Here we report the synthesis of stable α-FAPbI3, regardless of humidity and temperature, based on a vertically aligned lead iodide thin film grown from an ionic liquid, methylamine formate. The vertically grown structure has numerous nanometer-scale ion channels that facilitate the permeation of formamidi...
Source: ScienceNOW - March 25, 2021 Category: Science Authors: Hui, W., Chao, L., Lu, H., Xia, F., Wei, Q., Su, Z., Niu, T., Tao, L., Du, B., Li, D., Wang, Y., Dong, H., Zuo, S., Li, B., Shi, W., Ran, X., Li, P., Zhang, H., Wu, Z., Ran, C., Song, L., Xing, G., Gao, X., Zhang, J., Xia, Y., Chen, Y., Huang, W. Tags: Materials Science reports Source Type: news
Nanorod alignment for optical asymmetry
(Source: ScienceNOW)
Source: ScienceNOW - March 25, 2021 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Perovskite synthesis out in the open
(Source: ScienceNOW)
Source: ScienceNOW - March 25, 2021 Category: Science Authors: Szuromi, P. Tags: Materials Science twis Source Type: news
Formlabs Launches Scan to Model Feature for PreForm Software to Ease Dental Professionals ’ Entry into Digital Dentistry
With this new feature, Formlabs enables dental professionals to turn 3D intraoral scans into printable models directly in PreForm, mitigating learning hurdles associated with complex dental CAD programs and enabling practices to easily digitize their workflows.Somerville, MA - March 18, 2021–Formlabs, a leading 3D printing company, today announced Scan to Model, a new feature in its PreForm software, that is designed to convert intraoral scans into 3D printable models easily. Dental and orthodontic professionals can use Scan to Model as an entrypoint into digital workflows without having prior experience with di...
Source: Dental Technology Blog - March 18, 2021 Category: Dentistry Source Type: news
Tandem In2O3-Pt/Al2O3 catalyst for coupling of propane dehydrogenation to selective H2 combustion
Tandem catalysis couples multiple reactions and promises to improve chemical processing, but precise spatiotemporal control over reactive intermediates remains elusive. We used atomic layer deposition to grow In2O3 over Pt/Al2O3, and this nanostructure kinetically couples the domains through surface hydrogen atom transfer, resulting in propane dehydrogenation (PDH) to propylene by platinum, then selective hydrogen combustion by In2O3, without excessive hydrocarbon combustion. Other nanostructures, including platinum on In2O3 or platinum mixed with In2O3, favor propane combustion because they cannot organize the reactions s...
Source: ScienceNOW - March 18, 2021 Category: Science Authors: Yan, H., He, K., Samek, I. A., Jing, D., Nanda, M. G., Stair, P. C., Notestein, J. M. Tags: Chemistry, Materials Science reports Source Type: news
Overcoming propylene oxidation
(Source: ScienceNOW)
Source: ScienceNOW - March 18, 2021 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Hydrogenating borophene
(Source: ScienceNOW)
Source: ScienceNOW - March 11, 2021 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Spin injection sans magnetism
(Source: ScienceNOW)
Source: ScienceNOW - March 11, 2021 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Synthesis of borophane polymorphs through hydrogenation of borophene
Synthetic two-dimensional polymorphs of boron, or borophene, have attracted attention because of their anisotropic metallicity, correlated-electron phenomena, and diverse superlattice structures. Although borophene heterostructures have been realized, ordered chemical modification of borophene has not yet been reported. Here, we synthesize "borophane" polymorphs by hydrogenating borophene with atomic hydrogen in ultrahigh vacuum. Through atomic-scale imaging, spectroscopy, and first-principles calculations, the most prevalent borophane polymorph is shown to possess a combination of two-center–two-electron boron-hydro...
Source: ScienceNOW - March 11, 2021 Category: Science Authors: Li, Q., Kolluru, V. S. C., Rahn, M. S., Schwenker, E., Li, S., Hennig, R. G., Darancet, P., Chan, M. K. Y., Hersam, M. C. Tags: Chemistry, Materials Science reports Source Type: news
Chiral-induced spin selectivity enables a room-temperature spin light-emitting diode
In traditional optoelectronic approaches, control over spin, charge, and light requires the use of both electrical and magnetic fields. In a spin-polarized light-emitting diode (spin-LED), charges are injected, and circularly polarized light is emitted from spin-polarized carrier pairs. Typically, the injection of carriers occurs with the application of an electric field, whereas spin polarization can be achieved using an applied magnetic field or polarized ferromagnetic contacts. We used chiral-induced spin selectivity (CISS) to produce spin-polarized carriers and demonstrate a spin-LED that operates at room temperature w...
Source: ScienceNOW - March 11, 2021 Category: Science Authors: Kim, Y.-H., Zhai, Y., Lu, H., Pan, X., Xiao, C., Gaulding, E. A., Harvey, S. P., Berry, J. J., Vardeny, Z. V., Luther, J. M., Beard, M. C. Tags: Chemistry, Materials Science reports Source Type: news
Polarization hits a bull's-eye
(Source: ScienceNOW)
Source: ScienceNOW - March 4, 2021 Category: Science Authors: Grocholski, B. Tags: Materials Science twis Source Type: news
