Materials Literature
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Ultrathin Au nanowires (AuNWs) and tadpole-shaped nanowires are synthesized on graphene oxide (GO) sheet templates. For the first time, 1.6 nm-diameter AuNWs are shown to contain hexagonal close-packed (hcp) crystal domains, and the tadpole-shaped nanowires exhibit alternating sets of hcp and face-centered cubic (fcc)…
Hierarchically porous CuO architectures were successfully fabricated via copper basic carbonate precursor obtained with a facile hydrothermal route. The shape of the precursor is preserved after its conversion to porous CuO architectures by calcination. The obtained CuO are systemically characterized by X-ray powder d…
We report on the existence of water-gated charge doping of graphene deposited on atomically flat mica substrates. Molecular films of water in units of ~0.4 nm thick bilayers were found to be present in regions of the interface of graphene/mica heterostacks prepared by micromechanical exfoliation of kish graphite. The…
Environmental impacts due to engineered nanomaterials arise both from releases of the nanomaterials themselves as well as from their synthesis. In this work, we employ the USEtox model to quantify and compare aquatic ecotoxicity impacts over the life cycle of carbon nanotubes (CNTs). USEtox is an integrated multimedia…
To exploit the mechanical potential of native cellulose fibrils, we report on the preparation of nanopaper with preferred orientation of nanofibrillated cellulose (TEMPO-NFC) by cold drawing. The preparation route is papermaking-like and includes vacuum filtering of a TEMPO-oxidated NFC water dispersion, drawing in we…
The shape control of noble metal nanocrystals is crucial to their optical properties and catalysis applications. In this Progress Report, the recent progress of shape-controlled synthesis of Pd and Pt nanostructures assisted by small adsorbates is summarized. The use of small strong adsorbates (e.g., I(-) , CO, amines…
Tetramethylammonium silanolate-initiated ring-opening copolymerization of octamethylcyclotetrasiloxane (D(4)) and bis(heptamethylcyclotetrasiloxanyl)ethane (bis-D(4)) renders cross-linked network polymers that contain ethylene bridges and active silanolate end groups. These "living" reactive anionic species are not ne…
Although carbon nanotube (CNT) transistors have been promoted for years as a replacement for silicon technology, there is limited theoretical work and no experimental reports on how nanotubes will perform at sub-10 nm channel lengths. In this manuscript, we demonstrate the first sub-10 nm CNT transistor, which is show…
Titanium dioxide is a common additive in many food, personal care, and other consumer products used by people, which after use can enter the sewage system and, subsequently, enter the environment as treated effluent discharged to surface waters or biosolids applied to agricultural land, incinerated wastes, or landfill…
An impact of particles' roughness on the self-diffusion coefficient in granular gases is investigated. For a simplified collision model where the normal and tangential restitution coefficients are assumed to be constant we develop an analytical theory for the diffusion coefficient, which takes into account non-Maxwell…
Ionenspezifische Effekte sind allgegenwärtig. Durch modernste Experimente existiert heutzutage ein ganzes Spektrum von direkten, modifizierten und umgekehrten Hofmeister Serien. Das Ziel des ersten Teils dieser Arbeit ist es, dieses vielfältige Spektrum zu erklären, für das es bislang keine theoretische Beschreibung g…
Interactions at interfaces in thin films and multilayers play an important role for present day nano-scaled devices. For example, reducing thermally induced interdiffusion between Mo and Si layers is a key challenge in developing Mo/Si multilayers as reflective coatings for projection lithography and free electron las…
Penelitian ini bertujuan untuk mengetahui indeks keanekaragaman dan ada tidaknya perbedaan indeks keanekaragaman makroinvertebrata air vegetasi riparian sungai orde 1 (sungai Sempur), orde 2 (segmen sungai Maron sebelum bergabung dengan sungai Sempur) dan orde 2 (segmen sungai Maron setelah bergabung dengan sungai Sem…
The interface of a zinc-terminated polar zinc oxide surface (0002) with a series of chemisorbed fluorinated benzylphosphonic acids has been studied using density functional theory. The calculations indicate that there is a substantial change in the binding energies and work function modification depending on the bindi…
The generation of nanostructured assemblies with complex (three-dimensional, 3D) self-assembled morphologies and with complex (multicomponent) tailorable inorganic compositions is of considerable technological and scientific interest. This research demonstrates self-assembled 3D organic templates of biogenic origin ca…
Shock compaction experiments were performed on soft magnetic phases Fe₄N and Fe₁₆N₂, and hard magnetic phases Nd₂Fe₁₄B and Sm₂Fe₁₇N₃ in order to determine their thermo-mechanical stability during shock loading and explore the possibility of fabricating a textured nanocomposite magnet. Gas gun experiments performed on…
The fullerene nanofibers composed of C60, “C60 nanofibers,” were treated at various temperatures up to 3000°C in vacuum or in an Ar atmosphere. The structural characteristics of the heat-treated C60 nanofibers were examined by transmission electron microscopy and Raman spectroscopy. By high-temperature heat treatment,…
Syntheses of three types of typical fullerene derivatives — malonic acid-type, pyrrolidine-type, and metal complex — are described. Nanowhiskers containing these fullerene derivatives were prepared from a mixture of C60 and fullerene derivatives. These nanowhiskers were single crystalline, indicating that the fulleren…
The measured stress-strain curves from the tensile-loading experiments outlined in Fig. 9.1, for individual SWCNT ropes, are given in Fig. 9.2. Here, each rope diameter is measured at high magnification (~100,000) using a scanning electron microscope (SEM) to an accuracy of a few nanometers. The stress values have bee…
In the crystal structure of the title compound, [Cd(C(12)H(20)NSi)(2)], the Cd(II) cation is coordinated by two N and two C atoms within an irregular polyhedron. The four Cd-X (X = C, N) bond lengths are in the range 2.166 (4)-2.513 (4) Å.