loading Please wait. Data is being processed...

News of Inventions: 306682
Files of Inventions: 220
Groups of Inventors: 50

Friend Requests:
Private Messages:

Today's News: 89
Yesterday's News: 312

Today: 30 October 2020, Friday.

All latest news of Inventions in one place

Listed news of Inventions: 23 from total 306682

Filters


Welcome, Guest

News for Materials





#1

 

View it
Name
Description Marrying two layers of graphene is an easy route to the blissful formation of nanoscale diamond, but sometimes thicker is better. While it may only take a bit of heat to turn a treated bilayer of the ultrathin material into a cubic lattice of diamane, a bit of pressure in just the right place can

#Materials
Field # Materials
Updated 30 October 2020

#2

 

View it
Name
Description Natural graphite sheet (NGS) is compressible, porous, electrically and thermally conductive material that shows a potential to be used in fuel cells, flow batteries, electronics cooling systems, supercapacitors, adsorption air conditioning, and heat exchangers. We report the results of an extensive material characterization study that focuses on thermal conductivity, thermal diffusivity, electrical conductivity, coefficient of thermal expansion (CTE), compression strain, and emissivity. All the properties are density-dependent and highly anisotropic. Increasing the compression from 100 to 1080 kPa causes the through-plane thermal and electrical conductivities to increase by up to 116% and 263%, respectively. The properties are independent of the sheet thickness. Thermal and electrical contact resistance between stacked NGS is negligible at pressures 100 to 1080 kPa. In the in-plane direction, NGS follows the Wiedemann-Franz law with Lorenz number 6.6 $$ imes $$ 10 $$^{-6}$$ W $$Omega $$ K $$^{-2}$$ . The in-plane CTE is low and negative (shrinkage with increasing temperature), while the through-plane CTE is high, increases with density, and reaches 33 $$ imes $$ 10 $$^{-6}$$ K $$^{-1}$$ . Microscope images are used to study the structure and relate it to material properties. An easy-to-use graphical summary of the forming process and NGS properties are provided in Appendices A and B.

#Materials
Field # Materials
Updated 29 October 2020

#3

 

View it
Name
Description TBD

#Materials
Field # Materials
Updated 29 October 2020

#4

 

View it
Name
Description A joint research team led by Asst. Prof. Jihui Yuan at the Dept. of Architecture and Civil Eng. of Toyohashi University of Technology, in collaboration with Osaka City University, has proposed two analytical models to evaluate ...

#Materials
Field # Materials
Updated 29 October 2020

#5

 

View it
Name
Description TBD

#Materials
Field # Materials
Updated 28 October 2020

#6

 

View it
Name
Description Spider mites constitute an assemblage of well-known pests in agriculture, but are less known for their ability to spin silk of nanoscale diameters and high Young’s moduli. Here, we characterize silk of the gorse spider mite Tetranychus lintearius, which produces copious amounts of silk with nano-dimensions. We determined biophysical characteristics of the silk fibres and manufactured nanoparticles and biofilm derived from native silk. We determined silk structure using attenuated total reflectance Fourier transform infrared spectroscopy, and characterized silk nanoparticles using field emission scanning electron microscopy. Comparative studies using T. lintearius and silkworm silk nanoparticles and biofilm demonstrated that spider mite silk supports mammalian cell growth in vitro and that fluorescently labelled nanoparticles can enter cell cytoplasm. The potential for cytocompatibility demonstrated by this study, together with the prospect of recombinant silk production, opens a new avenue for biomedical application of this little-known silk.

#Materials
Field # Materials
Updated 28 October 2020

#7

 

View it
Name
Description In this work, a largely miscible second-generation aliphatic polyester hyperbranched polymer (HBP) is used as a modifier in a cured epoxy amine network to explore molecular mobility in the glassy state and its impact on compressive properties. The β relaxation determined by dynamic mechanical analysis is used as a measure of short-range motion in the glassy state and is related to the compressive modulus and yield properties. The parameters explored include an increased HBP concentration, enhanced HBP, and epoxy matrix interactions through pre-reaction via a rigid covalent linkage and a modified epoxy network of flexible butanediol diglycidyl ether (BDDGE) and highly crosslinkable tetraglycidyl diamino diphenyl methane (TGDDM). The β relaxation peaks are analyzed in terms of their area, FWHM, and position (Tβ) and are observed to correlate strongly with changes in the modulus, yield stress, and strain. A hyperbranched polymer (HBP) additive is used to explore short-range molecular motions in the glassy state of crosslinked epoxy amine networks via subambient β relaxations as measured by dynamic mechanical thermal analysis. Increasing HBP addition increased modulus and stress, while reducing yield strain. Pre-reaction using an isocyanate linkage between the HBP and network comparatively reduced modulus while increasing stress and strain. Glassy state mobility of the epoxy amine network as a result of HBP addition, could be directly related to many changes in mechanical properties observed.

#Materials
Field # Materials
Updated 28 October 2020

#8

 

View it
Name
Description An interdisciplinary team of researchers from The University of Manchester have developed a new graphene-based testing system for disease-related antibodies, initially targeting a kidney disease called Membranous Nephropathy. The new instrument, based on the principle of a quartz-crystal microbal

#Materials
Field # Materials
Updated 27 October 2020

#9

 

View it
Name
Description The study concerning the physical and chemical properties of thiophene derivatives has received much attention because they are incorporated in natural products, medicines, functional materials, and photoresponsive dyes. The autopolymerization reaction is one of the synthesis methods of polythiophenes using halogenated thiophene derivatives. In this paper, we analyzed the products and reaction mechanism of the polymerization reaction of 2-bromo-3-methoxythiophene by investigating the gas, liquid, and solid states using UV-Vis, electron spin resonance (ESR), gas chromatography/mass spectrometry (GC/MS), elemental analysis, NMR, and FT-IR spectroscopy. Consequently, we found a side reaction of the autopolymerization reaction and estimated that the polymerization reaction mechanism occurred in multiple steps. When we employed the brominated alkoxythiophene as a monomer, hydrogen bromide gas was generated to act not only as a catalyst of the polymerization reaction but also as an acid to cleave the alkoxyl group. The results provide useful information for the design of monomers via autopolymerization. The mechanism of intense autopolymerization reaction of 2-bromo-3-methoxythiophenes spewing brownish gas was clarified from UV-Vis, ESR, GC/MS, elemental analysis, NMR, and FT-IR spectroscopy. The reaction contained the formation of the hydrogen bromide gas during the autopolymerization. The gas induced the cleavage of the methoxy group on the thiophene ring to form the methyl bromide gas as the side reaction. This work provides an important guide for the application of the autopolymerization of thiophene derivatives to design new polymer materials.

#Materials
Field # Materials
Updated 27 October 2020

#10

 

View it
Name
Description The self-organization of liquid-crystalline monomers and subsequent polymerization is a unique strategy for creating nanostructured polymer membranes with novel functions and innovative properties. In this study, we developed gyroid nanostructured soft polymer films based on this strategy. Two types of amphiphile zwitterion monomers were designed and synthesized: a single-type amphiphile zwitterion monomer (S-ZI) and a gemini-type monomer (G-ZI). These compounds show liquid-crystalline behavior in the presence of bis(trifluoromethanesulfonyl)imide (HTf2N) and water. We attempted to find an appropriate mixing ratio of S-ZI and G-ZI that satisfied the following two criteria: suitability for the exhibition of bicontinuous cubic (Cubbi) phases and acquisition of self-standing properties and softness. The 25/75 wt% component ratio of S-ZI/G-ZI was found to meet these conditions. By carrying out a polymerization for the mixture in the above mixing ratio in the Cubbi phase, a polymer film with self-standing properties and resistance to bending was successfully obtained. This film showed a high ionic conductivity of 1.27 × 10−2 S cm−1 under a relative humidity of 90%. A gyroid nanostructured soft polymer film was developed by the co-organization of two types of amphiphile zwitterion monomers and a suitable acid into a bicontinuous cubic liquid-crystalline phase and subsequent in situ polymerization. The obtained polymer film showed a high ionic conductivity of 1.27 × 10–2 S cm–1 at a relative humidity of 90%.

#Materials
Field # Materials
Updated 27 October 2020

#11

 

View it
Name
Description Google aimed to include recycled materials in all of its Made By Google products by 2022 and it has reached that goal early as all its new Pixel and Nest products have included recycled material.

#Materials
Field # Materials
Updated 27 October 2020

#12

 

View it
Name
Description Small few-layer graphene (sFLG), a novel small-sized graphene-related material (GRM), can be considered as an intermediate degradation product of graphene. GRMs have a promising present and future in the field of biomedicine. However, safety issues must be carefully addressed to facilitate their implementation. In the work described here, the effect of sub-lethal doses of sFLG on the biology of human HaCaT keratinocytes was examined. A one-week treatment of HaCaTs with sub-lethal doses of sFLG resulted in metabolome remodeling, dampening of the mitochondrial function and a shift in the redox state to pro-oxidant conditions. sFLG raises reactive oxygen species and calcium from 24 h to one week after the treatment and this involves the activation of NADPH oxidase 1. Likewise, sFLG seems to induce a shift from oxidative phosphorylation to glycolysis and promotes the use of glutamine as an alternative source of energy. When sub-toxic sFLG exposure was sustained for 30 days, an increase in cell proliferation and mitochondrial damage were observed. Further research is required to unveil the safety of GRMs and degradation-derived products before their use in the workplace and in practical applications.

#Materials
Field # Materials
Updated 27 October 2020

#13

 

View it
Name
Description Superconducting resonators with high quality factors have been fabricated from aluminum films, suggesting potential applications in quantum computing. Improvement of thin film crystal quality and removal of void and pinhole defects will improve quality factor and functional yield. Epitaxial aluminum films with superb crystallinity, high surface smoothness, and interface sharpness were successfully grown on the c-plane of sapphire using sputter beam epitaxy. This study assesses the effects of varying substrate preparation conditions and growth and prebake temperatures on crystallinity and smoothness. X-ray diffraction and reflectivity measurements yield extensive Laue oscillations and Kiessig thickness fringes for films grown at 200 °C under 15 mTorr Ar, indicating excellent crystallinity and surface smoothness; moreover, an additional substrate preparation procedure which involves (1) a modified substrate cleaning procedure and (2) prebake at 700 °C in 20 mTorr O2 is shown by atomic force microscopy to yield nearly pinhole-free film growth while maintaining epitaxy and high crystal quality. The modified cleaning procedure is environmentally friendly and eliminates the acid etch steps common to conventional sapphire preparation, suggesting potential industrial application both on standard epitaxial and patterned surface sapphire substrates.

#Materials
Field # Materials
Updated 27 October 2020

#14

 

View it
Name
Description Eucalyptus grandis is a globally important tree crop. Greenhouse-grown tree seedlings often face water deficit after outplanting to the field, which can affect their survival and establishment severely. This can be alleviated by the application of superabsorbent hydrophilic polymers (SAPs). Growth promoting bacteria can also improve crop abiotic stress tolerance; however, their use in trees is limited, partly due to difficulties in the application and viability loss. In this work, we evaluated the improvement of drought tolerance of E. grandis seedlings by inoculating with two Pseudomonas strains (named M25 and N33), carried by an acrylic-hydrocellulosic SAP. We observed significant bacterial survival in the seedling rhizosphere 50 days after inoculation. Under gradual water deficit conditions, we observed a considerable increase in the water content and wall elasticity of M25-inoculated plants and a trend towards growth promotion with both bacteria. Under rapid water deficit conditions, which caused partial defoliation, both strains significantly enhanced the formation of new leaves, while inoculation with M25 reduced the transpiration rate. Co-inoculation with M25 and N33 substantially increased growth and photosynthetic capacity. We conclude that the selected bacteria can benefit E. grandis early growth and can be easily inoculated at transplant by using an acrylic-hydrocellulosic SAP.

#Materials
Field # Materials
Updated 26 October 2020

#15

 

View it
Name
Description A new test made out of a sheet of graphene could make kidney disease antibodiy diagnostics vastly more accessible and affordable.

#Materials
Field # Materials
Updated 26 October 2020

#16

 

View it
Name
Description Aluminum oxide ( $${ ext {AlO}}_x$$ )-based single-electron transistors (SETs) fabricated in ultra-high vacuum (UHV) chambers using in situ plasma oxidation show excellent stabilities over more than a week, enabling applications as tunnel barriers, capacitor dielectrics or gate insulators in close proximity to qubit devices. Historically, $${ ext {AlO}}_x$$ -based SETs exhibit time instabilities due to charge defect rearrangements and defects in $${ ext {AlO}}_x$$ often dominate the loss mechanisms in superconducting quantum computation. To characterize the charge offset stability of our $${ ext {AlO}}_x$$ -based devices, we fabricate SETs with sub-1 e charge sensitivity and utilize charge offset drift measurements (measuring voltage shifts in the SET control curve). The charge offset drift ( $$Delta {Q_0}$$ ) measured from the plasma oxidized $${ ext {AlO}}_x$$ SETs in this work is remarkably reduced (best $$Delta {Q_0}=0.13 , hbox {e} , pm , 0.01 , hbox {e}$$ over $$approx 7.6$$ days and no observation of $$Delta {Q_0}$$ exceeding $$1, hbox {e}$$ ), compared to the results of conventionally fabricated $${ ext {AlO}}_x$$ tunnel barriers in previous studies (best $$Delta {Q_0}=0.43 , hbox {e} , pm , 0.007 , hbox {e}$$ over $$approx 9$$ days and most $$Delta {Q_0}ge 1, hbox {e}$$ within one day). We attribute this improvement primarily to using plasma oxidation, which forms the tunnel barrier with fewer two-level system (TLS) defects, and secondarily to fabricating the devices entirely within a UHV system.

#Materials
Field # Materials
Updated 26 October 2020

#17

 

View it
Name
Description Single crystals and thin films of metal–organic frameworks can now be directly patterned by lithography down to the sub-50-nm scale, enabling straightforward integration in solid-state devices.

#Materials
Field # Materials
Updated 26 October 2020

#18

 

View it
Name
Description Non-fullerene acceptors have successfully overcome energy losses that were thought to be unavoidable in organic solar cells based on fullerene derivatives. However, it is now shown that they have limits too.

#Materials
Field # Materials
Updated 26 October 2020

#19

 

View it
Name
Description Electron microscopy touches on nearly every aspect of modern life, underpinning materials development for quantum computing, energy and medicine. We discuss the open, highly integrated and data-driven microscopy architecture needed to realize transformative discoveries in the coming decade.

#Materials
Field # Materials
Updated 26 October 2020

#20

 

View it
Name
Description TBD

#Materials
Field # Materials
Updated 25 October 2020

#21

 

View it
Name
Description Based on molecular dynamic method, densities, mechanical behavior and mechanical performance of P(BAMO/ AMMO) (Polymer 1) and two novel modified P(BAMO/AMMO) (Polymer 2: containing amino group, Polymer 3: containing nitro group), and their effects on mechanical properties of four energetic materials are investigated, the main results are as follow: Polymer 2 (1.235 g/cm3, 240 ± 5 K) and Polymer 3: 1.281 g/cm3, 181 ± 3 K) possess higher densities and lower glass transition temperatures than Polymer 1 (1.229 g/cm3, 247 ± 4 K). The modification makes Polymer 1 difficult to expand, improves its mechanical properties, but has few effect on its diffusion coefficient at same temperature and state. In addition, three binders are compatible with TNT, HMX and CL-20, and may react with DNTF. All polymers particularly improve rigidity of four energetic materials, and enhance their ductility except Polymer 2 on TNT. The ability of Polymer 2 and Polymer 3 improving rigidity (except Polymer 3 on HMX) and ductility of TNT and HMX is inferior to that of Polymer 1, but it is contrary for CL-20 and DNTF (except Polymer 2 on rigidity of DNTF). Moreover, Polymer 2-based interfacial crystals exhibit higher rigidity than Polymer 3-based interfacial crystals.

#Materials
Field # Materials
Updated 23 October 2020

#22

 

View it
Name
Description Modulation of initial burst and long term release from electrospun fibrous mats can be achieved by sandwiching the drug loaded mats between hydrophobic layers of fibrous polycaprolactone (PCL). Ibuprofen (IBU) loaded PCL fibrous mats (12% PCL-IBU) were sandwiched between fibrous polycaprolactone layers during the process of electrospinning, by varying the polymer concentrations (10% (w/v), 12% (w/v)) and volume of coat (1 ml, 2 ml) in flanking layers. Consequently, 12% PCL-IBU (without sandwich layer) showed burst release of 66.43% on day 1 and cumulative release (%) of 86.08% at the end of 62 days. Whereas, sandwich groups, especially 12% PCLSW-1 & 2 (sandwich layers—1 ml and 2 ml of 12% PCL) showed controlled initial burst and cumulative (%) release compared to 12% PCL-IBU. Moreover, crystallinity (%) and hydrophobicity of the sandwich models imparted control on ibuprofen release from fibrous mats. Further, assay for cytotoxicity and scanning electron microscopic images of cell seeded mats after 5 days showed the mats were not cytotoxic. Nuclear Magnetic Resonance spectroscopic analysis revealed weak interaction between ibuprofen and PCL in nanofibers which favors the release of ibuprofen. These data imply that concentration and volume of coat in flanking layer imparts tighter control on initial burst and long term release of ibuprofen.

#Materials
Field # Materials
Updated 23 October 2020

#23

 

View it
Name
Description TBD

#Materials
Field # Materials
Updated 23 October 2020