Materials Literature
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Understanding and controlling the self-assembly of colloidal nanostructures into ordered superstructures present scientifically interesting and technologically important research challenges. Here, we investigated the self-assembly, disordering, and reassembly of colloidal CdSe/CdS dot/rod nanorod (NR) films. We monito…
We report a novel approach to synthesize monodisperse hydrogel nanoparticles that are tunable in size. The distinctive feature of our approach is the use of a multicopper oxidase enzyme, laccase, as both a biocatalyst and template for nanoparticle growth. We utilize the ferroxidase activity of laccase to initiate loca…
A graphene transistor with a bottom-gate coplanar structure and an atomic layer deposition (ALD) aluminum oxide (Al2O3) gate dielectric is demonstrated. Wetting properties of ALD Al2O3 under different deposition conditions are investigated by measuring the surface contact angle. It is observed that the relatively hydr…
We studied the carrier dynamics in a series of SnOx thin films using femtosecond transient absorption (TA) spectroscopy. The observed carrier relaxation was found to be strongly dependent on thin film stoichiometry. The TA spectra corresponding to free carriers, trapped carriers, and state filling were observed in the…
We show both computationally and analytically that grain boundaries that exhibit shear-coupled motion become morphologically unstable in solid alloys that phase separate into coherent domains of distinct chemical compositions. We carry out simulations of continuum models demonstrating that this instability is mediated…
Twisted bilayer graphene (tBLG) is constituted of a two-graphene layer with a mismatch angle θ between the two hexagonal structures. It has recently attracted much attention—thanks to its diverse electronic and optical properties. Here, we study the tBLG fabricated by the direct transfer of graphene monolayer prepared…
We present a density functional study of Lennard-Jones liquids in contact with a nanocorrugated wall. The corresponding substrate potential is taken to exhibit a repulsive hard core and a Van der Waals attraction. The corrugation is modeled by a periodic array of square nanopits. We have used the modified Rosenfeld de…
Composites of poly (diphenylamine) and gold nanoparticles were chemically prepared from solutions which containing methane sulfonic acid (MSA) with the addition of gold chloride trihydrate as the oxidant as a source for initiation of polymerization and a generation of Au nanoparticles. Poly (diphenylamine) decorated w…
In this study, the polymer was synthesized via template-free oxidative reaction of 3-amino-2-naphthol (AN). For this purpose, bifunctional monomer was polymerized by NaOCl as oxidant in aqueous basic medium to give the corresponding poly (3-amino-2-naphthol) (PAN) with molecular weight ca. 11,100 Da. The chemical and…
Thermoelectric energy conversion is a direct but low-efficiency process, which precludes the development of long-awaited wide-scale applications. As a breakthrough permitting a drastic performance increase is seemingly out of reach, we fully reconsider the problem of thermoelectric coupling enhancement. The cornerston…
Surface Enhanced Raman spectroscopy (SERS) offers sensitive and non-invasive detection of a variety of compounds as well as unparalleled information for establishing the molecular identity of both inorganic and organic compounds, not only in biological fluids but in all other aqueous and non-aqueous media. The localiz…
ABSTRACT Poly (ε‐caprolactone) fibers were prepared by dry‐spinning method. The effect of processing parameters on linear density, mechanical, and morphological properties of fibers was investigated using the response surface methodology (RSM). This method allowed evaluating a quantitative relationship between polymer…
Abstract Reaction of LnCl 3 first with three equivalent of C 5 H 5 Na in THF, then with one equivalent of N ‐phenyldiethanolamine in THF‐DME afforded complexes of {[(C 5 H 5 )Ln((‐OCH 2 CH 2 ) 2 N(C 6 H 5 )] 4 (( 4 ‐Cl)}[Na(DME) 4 ] (Ln=Sm ( 1 ), Yb ( 2 )), being characterized by infrared spectra, elemental analyses a…
A hyperthermophilic archaeon was isolated from a terrestrial hot spring on Kodakara Island, Japan and designated as Thermoproteus sp. glucose dehydrogenase (GDH-1). Cell extracts from cells grown in medium supplemented with glucose exhibited NAD(P)-dependent glucose dehydrogenase activity. The enzyme (TgGDH) was purif…
Polycrystalline Er-Sc silicates (Er(x)Sc(2-x)SiO₅ and Er(x)Sc(2-x)Si₂O₇) were fabricated using multilayer nanostructured films of Er₂O₃/SiO₂/Sc₂O₃ deposited on SiO₂/Si substrates by RF- sputtering and thermal annealing at high temperature. RBS, TEM, GIXD, and PL results show the presence of Er(x)Sc(2-x)SiO₅ with an em…
Not only the apparent atomic arrangement but the charge distribution also defines the crystalline symmetry that dictates the electronic and vibrational structures. In this work, we report reversible and direction-controlled chemical doping that modifies the inversion symmetry of AB-bilayer and ABC-trilayer graphene. F…
We show theoretically that a two-dimensional periodic array of metallic nanocubes in close proximity to a metallic film acts as a metasurface with tunable absorbance. The presence of a metallic film underneath the array of plasmonic nanocubes leads to an impedance matched plasmonic metasurface enhancing up to 4 times…
Large-area Schottky diodes on hydrogen-terminated diamond are investigated through DC and small-signal characterization and physics-based equivalent circuit modeling. Measured current- and capacitance-voltage characteristics suggest significant distributed resistance effects induced by the relatively low mobility of t…
This study aims to elucidate the exposure properties of nanoparticles (NPs; <100 nm in diameter) in semiconductor manufacturing processes. The measurements of airborne NPs were mainly performed around process equipment during fabrication processes and during maintenance. The number concentrations of NPs were measured…
Abstract Solution phase exfoliation of graphite to yield multilayer graphene is used to form transparent electrodes, when transferred to polymer substrates. The electrochemical performance of these electrodes is determined and their use as optically‐transparent electrodes for spectro‐electrochemical applications is de…