Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In this work, we develop a new residue-based protein−surface interaction potential model. With this model, the adsorption and orientation of two antibodies, IgG1 and IgG2a, are studied by Monte Carlo simulations. Effects of surface charge density and sign, and solution ionic strength are examined in our simulations. S…
A new paradigm for nonlinear doping-controlled ion transport in soft condensed matter is presented, where the mobility of a minority "probe" ion is controlled by majority "salt" ion. The class of materials to which this paradigm applies is represented by ultrathin films of polyelectrolyte complexes, or multilayers. In…
We investigated the electronic structures of the perovskite-type $4d$ transition-metal oxides $\mathrm{Sr}M{\mathrm{O}}_{3}$ $(M=\mathrm{Zr},$ Mo, Ru, and Rh) using their optical conductivity spectra $\ensuremath{\sigma}(\ensuremath{\omega}).$ The interband transitions in $\ensuremath{\sigma}(\ensuremath{\omega})$ are…
Ferromagnetic semiconductors promise the extension of metal-based spintronics into a material system that combines widely tunable electronic, optical, and magnetic properties. Here, we take steps towards realizing that promise by achieving independent control of electronic doping in the ferromagnetic semiconductor (Ga…
We exploit ferromagnetic imprinting to create complex laterally defined regions of nuclear spin polarization in lithographically patterned MnAs/GaAs epilayers grown by molecular beam epitaxy (MBE). A time-resolved Kerr rotation microscope with approximately 1 micron spatial resolution uses electron spin precession to…
The Surface Evolver was used to calculate the equilibrium microstructure of random monodisperse soap froth, starting from Voronoi partitions of randomly packed spheres. The sphere packing has a strong influence on foam properties, such as E (surface free energy) and <f> (average number of faces per cell). This means t…
We present a dynamic molecular self-assembly system, driven mostly by π−π molecular orbital interactions. The formation of such self-organized dynamic systems is characterized with absorption, fluorescence, and NMR spectroscopies as well as dynamic light scattering. Our results demonstrate that proper design of molecu…
We report a novel wet-chemical approach at 180 degrees C for the synthesis of monodispersed ZnO nanorods with high single-crystallinity. The method has successfully brought the ZnO nanorod diameter from a reported 150 nm down to the 50 nm regime in this work. The aspect ratio of the synthesized nanorods achieved is ex…
An investigation into the smectic-A to chiral nematic (N'A) transition in liquid crystals is presented by using adiabatic scanning calorimetry (ASC). It is predicted theoretically that chirality drives this transition to first order. This transition is studied in mixtures of the nonchiral liquid crystal octyloxycyanob…
Picosecond nonlinear absorption dynamics of neutral metal-dithiolenes belonging to the general class [M(R,R′timdt)2] (M=Ni, Pd, Pt; R,R′ timdt=monoreduced form of disubstituted imidazolidine-2,4,5-trithione) has been investigated at λ=1064 nm using the pump–probe technique. Both central metal ion M and substituents R,…
Electron paramagnetic resonance (EPR) spectra of Nb4+ ions in Li2O–Nb2O5–P2O5 glasses with different composition of oxide components have been investigated. The EPR spectrum shape analysis of Nb4+ (electron configuration 4d1, electron spin S=1/2) reveals the formation of triplet niobium binuclear complex (total electr…
Ultrasonic waves are employed for the first time to incorporate ruthenium into the pore structure of SBA-15. The resultant materials were analyzed by X-ray diffraction (XRD), nitrogen adsorption, transmission electron microscopy (TEM) and Raman measurements. Only microporous channels of SBA-15 are confirmed to be fill…
We studied the dc conductivity of low-density polyethylene in the temperature range from 20 to 90 °C for electric fields from 4 kV m−1 to 20 MV m−1. The isochronal data measured after 1 h are in agreement with the literature. For a long time (6 days), the conduction mechanism is dominated by the space charge trapped i…
A series of bipyridine-centered diblock copolymers, bpy(A)(B), containing PMMA, PS, PCL, PLA, and PEG chains were synthesized via sequential, orthogonal strategies from unsymmetrical, difunctional bipyridine ligands. Specifically, the combination of atom transfer radical polymerization (ATRP) and ring-opening polymeri…
The behavior of boron incorporation into GaAs has been studied by x-ray photoelectron spectroscopy, x-ray diffraction, and atomic force microscopy. As the boron content of the film was increased, both the characteristic peak for the B 1s core level at 188 eV and As Auger transition (260 eV) could be detected by XPS. A…
Low temperature infrared spectra of light induced metastable states MS1 and MS2 of the nitroprusside anion in Na(2)[Fe(CN)(5)NO].2H(2)O, isotopically normal and substituted with (15)NO and N(18)O, are presented and discussed. As a consequence of the relatively high population of the MS2 state achieved by further irrad…
There are many kinds of silks from silkworms and spiders with different structures and properties, and thus, silks are suitable to study the structure-property relationship of fibrous proteins. Silk fibroin from a wild silkworm, Samia cynthia ricini, mainly consists of the repeated similar sequences by about 100 times…
Three perylene-oxochlorin dyads have been prepared and characterized with the goal of identifying charge-injection or molecular-switching motifs for use in molecular photonics. Each dyad consists of a perylene-bis(imide) dye (PDI) joined at the 10-position of a magnesium, zinc, or free base (Fb) oxochlorin via a diphe…
A perylene-oxochlorin dyad has been prepared and characterized for potential use as a new light-harvesting motif. The dyad (PMI−ZnO) consists of a perylene-monoimide dye (PMI) joined at the 5-position of a zinc oxochlorin (ZnO) via a diphenylethyne linker. The dyad and its subunits have been studied in both polar and…
We have investigated the formation of metal complexes between Zn2+ and two derivatives, 1 and 2, of the well-known 1,4,8,11-tetraazacyclotetradecane (cyclam) ligand. Compound 1 is 1,4,8,11-tetrakis(naphthylmethyl) cyclam, and compound 2 is a dendrimer consisting of a cyclam core with appended 12 dimethoxybenzene and 1…