A hair-splitting way to get dull
(Source: ScienceNOW)
Source: ScienceNOW - August 5, 2020 Category: Science Authors: Grocholski, B. Tags: Engineering, Materials Science twis Source Type: news
Ductile van der Waals materials
(Source: ScienceNOW)
Source: ScienceNOW - July 29, 2020 Category: Science Authors: Han, X. Tags: Materials Science perspective Source Type: news
Deformable semiconductors
(Source: ScienceNOW)
Source: ScienceNOW - July 29, 2020 Category: Science Authors: Grocholski, B. Tags: Materials Science twis Source Type: news
Exceptional plasticity in the bulk single-crystalline van der Waals semiconductor InSe
Inorganic semiconductors are vital for a number of critical applications but are almost universally brittle. Here, we report the superplastic deformability of indium selenide (InSe). Bulk single-crystalline InSe can be compressed by orders of magnitude and morphed into a Möbius strip or a simple origami at room temperature. The exceptional plasticity of this two-dimensional van der Waals inorganic semiconductor is attributed to the interlayer gliding and cross-layer dislocation slip that are mediated by the long-range In-Se Coulomb interaction across the van der Waals gap and soft intralayer In-Se bonding. We propo...
Source: ScienceNOW - July 29, 2020 Category: Science Authors: Wei, T.-R., Jin, M., Wang, Y., Chen, H., Gao, Z., Zhao, K., Qiu, P., Shan, Z., Jiang, J., Li, R., Chen, L., He, J., Shi, X. Tags: Materials Science reports Source Type: news
Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNTx (MXene)
Lightweight, ultrathin, and flexible electromagnetic interference (EMI) shielding materials are needed to protect electronic circuits and portable telecommunication devices and to eliminate cross-talk between devices and device components. Here, we show that a two-dimensional (2D) transition metal carbonitride, Ti3CNTx MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductive Ti3C2Tx or metal foils of the same thickness. This exceptional shielding performance of Ti3CNTx was achieved by thermal annealing and is attributed to an anomalously high absorption of elec...
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Iqbal, A., Shahzad, F., Hantanasirisakul, K., Kim, M.-K., Kwon, J., Hong, J., Kim, H., Kim, D., Gogotsi, Y., Koo, C. M. Tags: Materials Science reports Source Type: news
Ultrahigh-strength and ductile superlattice alloys with nanoscale disordered interfaces
Alloys that have high strengths at high temperatures are crucial for a variety of important industries including aerospace. Alloys with ordered superlattice structures are attractive for this purpose but generally suffer from poor ductility and rapid grain coarsening. We discovered that nanoscale disordered interfaces can effectively overcome these problems. Interfacial disordering is driven by multielement cosegregation that creates a distinctive nanolayer between adjacent micrometer-scale superlattice grains. This nanolayer acts as a sustainable ductilizing source, which prevents brittle intergranular fractures by enhanc...
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Yang, T., Zhao, Y. L., Li, W. P., Yu, C. Y., Luan, J. H., Lin, D. Y., Fan, L., Jiao, Z. B., Liu, W. H., Liu, X. J., Kai, J. J., Huang, J. C., Liu, C. T. Tags: Engineering, Materials Science reports Source Type: news
Cooperative carbon capture and steam regeneration with tetraamine-appended metal-organic frameworks
Natural gas has become the dominant source of electricity in the United States, and technologies capable of efficiently removing carbon dioxide (CO2) from the flue emissions of natural gas–fired power plants could reduce their carbon intensity. However, given the low partial pressure of CO2 in the flue stream, separation of CO2 is particularly challenging. Taking inspiration from the crystal structures of diamine-appended metal–organic frameworks exhibiting two-step cooperative CO2 adsorption, we report a family of robust tetraamine-functionalized frameworks that retain cooperativity, leading to the potential f...
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Kim, E. J., Siegelman, R. L., Jiang, H. Z. H., Forse, A. C., Lee, J.-H., Martell, J. D., Milner, P. J., Falkowski, J. M., Neaton, J. B., Reimer, J. A., Weston, S. C., Long, J. R. Tags: Chemistry, Materials Science r-articles Source Type: news
Steaming out captured CO2
(Source: ScienceNOW)
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Shields up!
(Source: ScienceNOW)
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Lavine, M. S. Tags: Materials Science twis Source Type: news
Strength through disorder
(Source: ScienceNOW)
Source: ScienceNOW - July 22, 2020 Category: Science Authors: Grocholski, B. Tags: Engineering, Materials Science twis Source Type: news
Materials scientist James de Yoreo receives Distinguished Scientist Fellow award
(DOE/Pacific Northwest National Laboratory) The US Department of Energy's Office of Science bestows one of its highest honors on PNNL materials scientist James De Yoreo. (Source: EurekAlert! - Biology)
Source: EurekAlert! - Biology - July 22, 2020 Category: Biology Source Type: news
N-Aryl-linked spirocyclic polymers for membrane separations of complex hydrocarbon mixtures
The fractionation of crude-oil mixtures through distillation is a large-scale, energy-intensive process. Membrane materials can avoid phase changes in such mixtures and thereby reduce the energy intensity of these thermal separations. With this application in mind, we created spirocyclic polymers with N-aryl bonds that demonstrated noninterconnected microporosity in the absence of ladder linkages. The resulting glassy polymer membranes demonstrated nonthermal membrane fractionation of light crude oil through a combination of class- and size-based "sorting" of molecules. We observed an enrichment of molecules lighter than 1...
Source: ScienceNOW - July 15, 2020 Category: Science Authors: Thompson, K. A., Mathias, R., Kim, D., Kim, J., Rangnekar, N., Johnson, J. R., Hoy, S. J., Bechis, I., Tarzia, A., Jelfs, K. E., McCool, B. A., Livingston, A. G., Lively, R. P., Finn, M. G. Tags: Engineering, Materials Science reports Source Type: news
Giant piezoelectricity in oxide thin films with nanopillar structure
High-performance piezoelectric materials are critical components for electromechanical sensors and actuators. For more than 60 years, the main strategy for obtaining large piezoelectric response has been to construct multiphase boundaries, where nanoscale domains with local structural and polar heterogeneity are formed, by tuning complex chemical compositions. We used a different strategy to emulate such local heterogeneity by forming nanopillar regions in perovskite oxide thin films. We obtained a giant effective piezoelectric coefficient of ~1098 picometers per volt with a high Curie temperature of ~450°C. Our lead-f...
Source: ScienceNOW - July 15, 2020 Category: Science Authors: Liu, H., Wu, H., Ong, K. P., Yang, T., Yang, P., Das, P. K., Chi, X., Zhang, Y., Diao, C., Wong, W. K. A., Chew, E. P., Chen, Y. F., Tan, C. K. I., Rusydi, A., Breese, M. B. H., Singh, D. J., Chen, L.-Q., Pennycook, S. J., Yao, K. Tags: Physics, Applied, Materials Science reports Source Type: news
Separating organics without distillation
(Source: ScienceNOW)
Source: ScienceNOW - July 15, 2020 Category: Science Authors: Lavine, M. S. Tags: Engineering, Materials Science twis Source Type: news
Simple strain enhancement
(Source: ScienceNOW)
Source: ScienceNOW - July 15, 2020 Category: Science Authors: Grocholski, B. Tags: Physics, Applied, Materials Science twis Source Type: news
