Zeolites that prefer alkynes
(Source: ScienceNOW)
Source: ScienceNOW - May 27, 2020 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
Response to Comment on "High-surface-area corundum by mechanochemically induced phase transformation of boehmite"
Li et al. commented that our report claims that methods reported thus far cannot enable the production of high-purity corundum with surface areas greater than 100 m2 g–1, and that our obtained material could be porous aggregates rather than nanoparticles. We disagree with both of these suggestions. (Source: ScienceNOW)
Source: ScienceNOW - May 27, 2020 Category: Science Authors: Amrute, A. P., Łodziana, Z., Schreyer, H., Weidenthaler, C., Schüth, F. Tags: Chemistry, Materials Science t-comment Source Type: news
Comment on "High-surface-area corundum by mechanochemically induced phase transformation of boehmite"
Amrute et al. (Reports, 25 October 2019, p. 485) claimed that no methods were able to produce high-purity α-Al2O3 with surface areas greater than 100 m2 g–1, even though much higher surface areas up to 253 m2 g–1 have been reported. Moreover, the materials they obtained could be porous aggregates and may not be 13-nm nanoparticles, as claimed. (Source: ScienceNOW)
Source: ScienceNOW - May 27, 2020 Category: Science Authors: Li, J., Pu, S., Cao, W., Li, L., Guo, R. Tags: Chemistry, Materials Science t-comment Source Type: news
New Materials Cloud Archive offers easier submission and record management for authors
(National Centre of Competence in Research (NCCR) MARVEL) After nearly 18 months of planning and programming, the team behind the new Materials Cloud Archive is ready to unveil a major reengineering based on the CERN-developed data technology that also drives the massive Zenodo repository. The new archive improves the user experience, permits the scaling needed to accommodate the growing number of submissions and helps moderators and developers focus on the core work of the archive -- enabling the seamless sharing and dissemination of resources in computational materials science. (Source: EurekAlert! - Social and Behavioral Science)
Source: EurekAlert! - Social and Behavioral Science - May 27, 2020 Category: International Medicine & Public Health Source Type: news
DNA bricks build nanotube transistors
(Source: ScienceNOW)
Source: ScienceNOW - May 20, 2020 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
DNA-directed nanofabrication of high-performance carbon nanotube field-effect transistors
Biofabricated semiconductor arrays exhibit smaller channel pitches than those created using existing lithographic methods. However, the metal ions within biolattices and the submicrometer dimensions of typical biotemplates result in both poor transport performance and a lack of large-area array uniformity. Using DNA-templated parallel carbon nanotube (CNT) arrays as model systems, we developed a rinsing-after-fixing approach to improve the key transport performance metrics by more than a factor of 10 compared with those of previous biotemplated field-effect transistors. We also used spatially confined placement of assemble...
Source: ScienceNOW - May 20, 2020 Category: Science Authors: Zhao, M., Chen, Y., Wang, K., Zhang, Z., Streit, J. K., Fagan, J. A., Tang, J., Zheng, M., Yang, C., Zhu, Z., Sun, W. Tags: Chemistry, Materials Science reports Source Type: news
Precise pitch-scaling of carbon nanotube arrays within three-dimensional DNA nanotrenches
We report the precise scaling of inter-CNT pitch using a supramolecular assembly method called spatially hindered integration of nanotube electronics. Specifically, by using DNA brick crystal-based nanotrenches to align DNA-wrapped CNTs through DNA hybridization, we constructed parallel CNT arrays with a uniform pitch as small as 10.4 nanometers, at an angular deviation <2° and an assembly yield >95%. (Source: ScienceNOW)
Source: ScienceNOW - May 20, 2020 Category: Science Authors: Sun, W., Shen, J., Zhao, Z., Arellano, N., Rettner, C., Tang, J., Cao, T., Zhou, Z., Ta, T., Streit, J. K., Fagan, J. A., Schaus, T., Zheng, M., Han, S.-J., Shih, W. M., Maune, H. T., Yin, P. Tags: Chemistry, Materials Science reports Source Type: news
Retrofitting of VW Diesel engines was successful
(Swiss Federal Laboratories for Materials Science and Technology (EMPA)) Using exhaust gas measurements taken from the roadside, a team from the University of York and Empa was able to prove the " Dieselgate " scandal has led to positive results. The forced retrofitting of thousands of VW diesel engines saves the environment throughout Europe considerable amounts of Nitrogen oxide (NOx). (Source: EurekAlert! - Social and Behavioral Science)
Source: EurekAlert! - Social and Behavioral Science - May 19, 2020 Category: International Medicine & Public Health Source Type: news
Scientists collaborate to create new physics-based technology for COVID-19 detection
(Northern Arizona University) NAU physicist and materials scientist Miguel Jos é Yacam á n is leading an interdisciplinary team to develop a new test technology for the coronavirus that is based on physics, not biochemicals, that promises to overcome the challenges presented by current shortages of test kits and test efficacy. (Source: EurekAlert! - Medicine and Health)
Source: EurekAlert! - Medicine and Health - May 14, 2020 Category: International Medicine & Public Health Source Type: news
Response to Comment on "Dry reforming of methane by stable Ni-Mo nanocatalysts on single-crystalline MgO"
Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation of evidence for the Nanocatalysts on Single Crystal Edges (NOSCE) mechanism. Their arguments do not take into account fundamental differences between our Ni-Mo/MgO catalyst and their NiO/MgO preparations. (Source: ScienceNOW)
Source: ScienceNOW - May 13, 2020 Category: Science Authors: Song, Y., Ozdemir, E., Ramesh, S., Adishev, A., Subramanian, S., Harale, A., Albuali, M., Fadhel, B. A., Jamal, A., Moon, D., Choi, S. H., Yavuz, C. T. Tags: Chemistry, Materials Science t-comment Source Type: news
Comment on "Dry reforming of methane by stable Ni-Mo nanocatalysts on single-crystalline MgO"
Song et al. (Reports, 14 February 2020, p. 777) ignore the reported efficient Ni/MgO solid-solution catalysts and overstate the novelty and importance of the Mo-doped Ni/MgO catalysts for the dry reforming of methane. We show that the Ni/MgO solid-solution catalyst that we reported in 1995, which is efficient and stable for the dry reforming, is superior to the Mo-doped Ni/MgO catalyst. (Source: ScienceNOW)
Source: ScienceNOW - May 13, 2020 Category: Science Authors: Hu, Y. H., Ruckenstein, E. Tags: Chemistry, Materials Science t-comment Source Type: news
Controlling interdependent meso-nanosecond dynamics and defect generation in metal 3D printing
State-of-the-art metal 3D printers promise to revolutionize manufacturing, yet they have not reached optimal operational reliability. The challenge is to control complex laser–powder–melt pool interdependency (dependent upon each other) dynamics. We used high-fidelity simulations, coupled with synchrotron experiments, to capture fast multitransient dynamics at the meso-nanosecond scale and discovered new spatter-induced defect formation mechanisms that depend on the scan strategy and a competition between laser shadowing and expulsion. We derived criteria to stabilize the melt pool dynamics and minimize defects...
Source: ScienceNOW - May 6, 2020 Category: Science Authors: Khairallah, S. A., Martin, A. A., Lee, J. R. I., Guss, G., Calta, N. P., Hammons, J. A., Nielsen, M. H., Chaput, K., Schwalbach, E., Shah, M. N., Chapman, M. G., Willey, T. M., Rubenchik, A. M., Anderson, A. T., Wang, Y. M., Matthews, M. J., King, W. E. Tags: Materials Science, Physics reports Source Type: news
Emergence of complexity in hierarchically organized chiral particles
We report the self-assembly of hierarchically organized particles (HOPs) from polydisperse gold thiolate nanoplatelets with cysteine surface ligands. Graph theory methods indicate that these HOPs, which feature twisted spikes and other morphologies, display higher complexity than their biological counterparts. Their intricate organization emerges from competing chirality-dependent assembly restrictions that render assembly pathways primarily dependent on nanoparticle symmetry rather than size. These findings and HOP phase diagrams open a pathway to a large family of colloids with complex architectures and unusual chiroptic...
Source: ScienceNOW - May 6, 2020 Category: Science Authors: Jiang, W., Qu, Z.-b., Kumar, P., Vecchio, D., Wang, Y., Ma, Y., Bahng, J. H., Bernardino, K., Gomes, W. R., Colombari, F. M., Lozada-Blanco, A., Veksler, M., Marino, E., Simon, A., Murray, C., Muniz, S. R., de Moura, A. F., Kotov, N. A. Tags: Chemistry, Materials Science reports Source Type: news
Circumventing spatter
(Source: ScienceNOW)
Source: ScienceNOW - May 6, 2020 Category: Science Authors: Grocholski, B. Tags: Materials Science, Physics twis Source Type: news
Complex chiral particles
(Source: ScienceNOW)
Source: ScienceNOW - May 6, 2020 Category: Science Authors: Szuromi, P. Tags: Chemistry, Materials Science twis Source Type: news
