Materials Literature
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This paper presents research on the genetic structure and diversity of populations of a common marine protist and their changes over time. The bloom-forming diatom Skeletonema marinoi was used as a model organism. Strains were revived from anoxic discrete layers of a (210)Pb-dated sediment core accumulated over more t…
Birch reduction of few-layer graphene samples gives rise to hydrogenated samples containing up to 5 wt % of hydrogen. Spectroscopic studies reveal the presence of sp(3) C-H bonds in the hydrogenated graphenes. They, however, decompose readily on heating to 500 °C or on irradiation with UV or laser radiation releasing…
An analysis based on the energy conservation is presented for the self-propelled droplet during coalescence of two droplets of the same size over a superhydrophobic rough surface. The self-propelled behavior occurs only for the coalescence of droplets with a certain range of radius. An analytical relation is establish…
We present a robust method for forming high quality ohmic contacts to graphene, which improves the contact resistance by nearly 6000 times compared to untreated metal/graphene interfaces. The optimal specific contact resistance for treated Ti/Au contacts is found to average <10−7 Ω cm2. Additionally, we examine Al/Au,…
We report the development of a chitosan nanocarrier (NC)-based delivery of silver nanoparticles (Ag NPs) to mammalian cells for induction of apoptosis at very low concentrations of the NPs. The cytotoxic efficacy of the Ag NP-nanocarrier (Ag-CS NC) system in human colon cancer cells (HT 29) was examined by morphologic…
A ferroelectric-resistive random access memory consisting of a conductive BiFeO3 epitaxial thin film with a unipolar diode current modulated by electric polarization orientation is reported. This device has a memory that lasts for months, a sufficiently high on current and on/off ratio to permit ordinary sense amplifi…
A superaligned carbon nanotube (CNT) array is a special kind of vertically aligned CNT array with the capability of being converted into continuous fi lms and yarns. The as-produced CNT fi lms are transparent and highly conductive, with aligned CNTs parallel to the direction of drawing. After passing through volatile…
Subnanometer-sized copper nanoclusters were prepared by a one-pot procedure based on wet chemical reduction. The structural characteristics of the 2-mercapto-5-n-propylpyrimidine-protected nanoclusters, Cu(n) (n ≤ 8), were determined by mass spectrometry. The Cu nanoclusters displayed apparent luminescence, with dual…
We report direct mapping of the grains and grain boundaries (GBs) of large-area monolayer polycrystalline graphene sheets, at large (several micrometer) and single-atom length scales. Global grain and GB mapping is performed using electron diffraction in scanning transmission electron microscopy (STEM) or using dark-f…
Water chemistry can be a major factor regulating the toxicity mechanism of ZnO nanoparticles (nano-ZnO) in water. The effect of five commonly used aqueous media with various chemical properties on the toxicity of nano-ZnO to Escherichia coli O111 (E. coli) was investigated, including ultrapure water, 0.85% NaCl, phosp…
Objective: To evaluate ZnPP Ⅸ's effect on the expression of p-glycoprotein (P-GP) and the chemosensitivity of drug-resistant hepatic carcinoma Bel/Fu cell line, and to explore the relevant regulating mechanism. Methods: After Bel/FU cells being induced by different gradient concentrations of ZnPP Ⅸ for 24 h, MTT assay…
Ti-based bulk amorphous alloys with different diameters from 2 mm to 4 mm were formed in Ti40Cu(subscript 34+x)Ni(subscript 16-x)Zr10 (x=0, 2, 4, 5, 6) system by copper mould casting. Their phase structure, microstructure and thermal stability were investigated by X-ray diffraction (XRD), scanning electron microscopy…
Thermodynamically Stable Blue Phases Authors: F. Castles, S. M. Morris, E. M. Terentjev, and H. J. Coles Phys. Rev. Lett. 104, 157801 (2010) Recommended with a commentary by Jonathan V. Selinger, Kent State University | View Commentary (PDF) | DOI: 10.36471/JCCM_January_2011_02 https://doi.org/10.36471/JCCM_January_20…
Ai, Xuyuan E; Studer, Anja S; Sigman, Daniel M; Martínez-García, Alfredo; François, Fripiat; Thöle, Lena M; Michel, Elisabeth; Gottschalk, Julia; Arnold, Laura; Moretti, Simone; Schmitt, Mareike; Oleynik, Sergey; Jaccard, Samuel L; Haug, Gerald H (2021): Diatom bound nitrogen isotopes of sediment core MD11-3353 [datas…
Previous studies suggest that, during the late Pleistocene ice ages, surface-deep exchange was somehow weakened in the Southern Ocean's Antarctic Zone (AZ), reducing the leakage of deeply sequestered CO2 and thus contributing to the lower atmospheric CO2 levels of the ice ages. To better understand the surface nutrien…
Studer, Anja S; Sigman, Daniel M; Martínez-García, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel L; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen; Robinson, Laura F; Adkins, Jess F; Haug, Gerald H (2018): Diatom-bound nitrogen isotope records in sediment core MD11-3353 [dataset]. PANGAEA, https://doi.org/10.…
The structure and stability of strongly charged complex fibers formed by complexation of a single long semi-flexible polyelectrolyte (PE) chain and many oppositely charged spherical macroions are investigated numerically at the ground-state level using a chain-sphere cell model. The model takes into account chain elas…
In this review, we address the issue of the electrostatic complexation between charged-neutral diblock copolymers and oppositely charged nanocolloids. We show that nanocolloids such as surfactant micelles and iron oxide magnetic nanoparticles share similar properties when mixed with charged-neutral diblocks. Above a c…
It has been conducted on the effect of ion implantation of TiN to wear ball bearings with grease lubrication. Ball bearing is one of the supporting components contained in the machine and the parts of a rotating element as found in automotive components. During the operation, this component causes the surface wear and…
Many recent studies have focused on yttrium aluminum garnet (YAG) laser transparent ceramics, because they have incomparable superiority over single crystal and glass laser materials. YAG laser transparent ceramic doped by rare earth element with high performance was largely reported. The progress in investigations on…