Materials Literature
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We analyze the far field and near field diffraction pattern produced by an amplitude grating whose strips present rough edges. Due to the stochastic nature of the edges a statistical approach is performed. The grating with rough edges is not purely periodic, although it still divides the incident beam in diffracted or…
Structural elucidation of molecules attached to nanoparticle surface holds key to the successful chemical modifications of nanomaterial surface. In this investigation, we effectively optimized 1 H HRMAS NMR conditions and applied one- and two-dimensional techniques to fully characterize ligand structures on surfaces o…
Abstract Bacterial flagellum is a protein nanotube that is helically self‐assembled from thousands of a protein subunit called flagellin. The solvent‐exposed domain of each flagellin on the flagella is genetically modifiable, in that a foreign peptide can be genetically inserted into this domain, leading to the high‐d…
The formation of self-assembled fibrillar networks by low molecular weight peptidomimetics containing a Pro-Val moiety is reported; insight into the aggregation mechanism is provided revealing that it is associated to an unfolding process and that a fibrillar network formed under kinetic control can self-correct into…
Three-dimensionally (3D) mesoporous single-crystalline CaO nano- and microparticles with tri-, tetra-, and hexagonal morphologies have been successfully fabricated using a surfactant (P123, CTAB, or PEG) assisted hydrothermal dissolution−recrystallization strategy with irregular nonporous CaO powders as the starting m…
Ordered porous materials are of great technological interest for use as separation, catalysis, adsorbents, and electronic devices. We report here a fabrication of honeycomb-patterned porous films from fluorescent hyperbranched poly(phenylene vinylene) (hypPPV) by breath figure method and the thermal conversion of this…
Charge transfer to and from semiconductor quantum dots (QDs) is of intense interest because of its important roles in QD-based devices, such as light emitting diodes and solar cells. We now report a mechanistic study of the electron transfer (ET) processes between CdTe QDs and a pyromellitimide derivative with a carbo…
This work deals with atmospheric corrosion to assess the degrading effects of air pollutants on ferrous and non-ferrous metals and alloys, which are mostly used as engineering materials. An exposure study was conducted in the Tuticorin port area located on the east coast of South India, in the Gulf of Mannar with Sri…
The low-frequency phonon modes of cubic ZrW(2)O(8) and HfW(2)O(8), and trigonal ZrMo(2)O(8) and HfMo(2)O(8) have been comparatively studied by Raman and terahertz time-domain spectroscopy. It is shown that there appear a number of distinctive low-frequency modes below 150 cm(-1) in the cubic ZrW(2)O(8) and HfW(2)O(8)…
According to Derjaguin−Landau−Verwey−Overbeek (DLVO) theory, anions stabilize solutions of metal(0) nanoparticles by binding to the metal surface. However, the structure of the metal−anion interface in these colloidal systems has eluded direct observation. To address this, we deployed a 1.2-nm sized heteropolytungstat…
A pyrene-modified beta-cyclodextrin (pyrenecyclodextrin)-decorated single-walled carbon nanotube (SWNT) field-effect transistor (FET) device was fabricated, which can serve as a tunable photosensor to sense a fluorescent adamantyl-modified Ru complex (ADA-Ru). When the light is on (I = 40 W m(-2) and lambda = 280 nm),…
The synthesis of a series of novel photoresponsive side-chain liquid crystalline polymers (LCPs) bearing an N-hydroxysuccinimide carboxylate-substituted azobenzene mesogen and their use in generating LCP networks are described. The obtained polymers and their monomers were characterized with 1H NMR, UV-vis, TGA, DSC,…
Polymeric fluorescent nanoparticles with covalently embedded perylene fluorophores were developed by facile synthesis strategy and their advanced features of extremely high fluorescence intensity, non-photoblinking and excellent photostability were experimentally confirmed at the single nanoparticle level.
The electronic structure of ${\text{SrTiO}}_{3}$ single-crystal surfaces and their interaction with ${\text{CO}}_{2}$ at room temperature is studied by angle-resolved x-ray and ultraviolet photoelectron spectroscopies (XPS and UPS) and density-functional theory (DFT). ${\text{CO}}_{2}$ exposure results in spectral fea…
A less studied class of magnetic semiconductors based on the tetradymite structure compounds, which include ${\text{Bi}}_{2}{\text{Te}}_{3}$, ${\text{Bi}}_{2}{\text{Se}}_{3}$, and ${\text{Sb}}_{2}{\text{Te}}_{3}$, doped with $3d$ transition-metal $(T)$ elements is investigated using the full-potential linearized muffi…
We describe first neutron reflectometry experiments on spray-assembled polyelectrolyte multilayer films containing regularly spaced layers of perdeuterated poly(styrene sulfonate). From samples containing either only non-deuterated layers or containing a maximum of deuterated layers we obtain all model parameters (thi…
Abstract Reported here are two new compounds containing either a CrCr ··· Co [ 1 , CrCrCo(dpa) 4 Cl 2 , dpa = 2,2′‐dipyridylamide] or a MoMo ··· Co [ 2 , MoMoCo(dpa) 4 Cl 2 ] framework both having a multiply‐bonded unit (CrCr in 1 , MoMo in 2 ) in close proximity to the Co 2+ ion and trans to a Co–Cl bond. Variabl…
Core-modified isophlorin−metal complexes were successfully prepared by redox-coupled complexation of P,S,N 2 -hybrid porphyrin with zerovalent palladium, nickel, and platinum. In this transformation, the core-phosphorus atom plays crucial roles in enhancing the electron-accepting ability of the 18π porphyrin ring and…
In this paper we use the boundary integral method to model the non-spherical collapse of bubbles excited by lithotripter shock waves near a rigid boundary. The waves we consider are representative of those developed by shock wave lithotripsy or shock wave therapy devices, and the rigid boundaries we consider are repre…
Imaging of enzyme activity is a central goal of molecular imaging. With the introduction of fluorescent smart probes, optical imaging has become the modality of choice for experimental in vivo detection of enzyme activity. Here, we present a novel high-relaxivity nanosensor that is suitable for in vivo imaging of prot…