Materials Literature
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Abstract We solve numerically the Boltzmann transport equations of the phonons and electrons to understand the thermoelectric response in heterostructures of M 2 CO 2 (M: Ti, Zr, Hf) MXenes with transition metal dichalcogenide monolayers. Low frequency optical phonons are found to occur as a consequence of the van der…
This paper is focused on investigating the microstructure of kapok fiber through the observation of residual deformation and fracture morphology of kapok fibers in longitudinal microscopic images. By comparing the morphology of kapok fibers before and after different treatments, unique weak spiral lines inside the cel…
Synthesis, characterization, and properties of new thermally curable polysulfone containing benzoxazine moieties in the side chain were investigated. First, chloromethylation and subsequent azidation processes were performed to form polysulfone containing pendant clickable azide groups. Independently, antagonist 3,4-d…
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans the biological, physical, and social sciences.
Langmuir–Blodgett (LB) films of amphiphilic block copolymers (BCs) form well-defined nanostructures with long-range order useful, for instance, for nanolithography applications. Nanostructures with a 2D circular micelle (“dot”) morphology are known to present a constant pressure plateau in their Langmuir isotherm (sur…
This study investigates the characteristic of the microcrystalline cellulose (MCC) isolated from oil palm (Elaies guineensis) fronds using acid hydrolysis method. The morphology and size of the MCC were characterized using both Sherrer equations for X-ray diffraction (XRD) result and transmission electron microscopy (…
The aim of this work was preparation of biopolymer materials based on blends of chitosan, hyaluronic acid and collagen. The properties of blend films have been investigated by contact angle measurements and atomic force microscopy. The contact angle measurements showed that chitosan films are more polar after addition…
ABSTRACT In this study a complete characterization of the thermomechanical and shape‐memory properties of epoxy shape‐memory polymers modified with hyperbranched polymer and aliphatic diamine was performed. Focusing on the mechanical properties that are highly desirable for shape‐memory polymers, tensile behavior unti…
A broad fundamental understanding of the mechanisms underlying the phenomenology of supercooled liquids has remained elusive, despite decades of intense exploration. When supercooled beneath its characteristic melting temperature, a liquid sees a sharp rise in its viscosity over a narrow temperature range, eventually…
The chemisorption of (acetylacetonato)copper(II) on gold-nanoparticle- (Au-NP-) loaded rutile TiO 2 and subsequent heating in the air at 773 K yields molecular-scale CuO clusters on the TiO 2 surface with varying CuO loading amounts (Au/TiO 2 –CuO) ( J. Phys. Chem. C 2013, 117, 23848−23857). The three-component Au/TiO…
The curing characteristics of silicone rubber (polydimethylsiloxane [PDMS]) in the presence of structurally different peroxides, namely dicumyl peroxide (DCP) and 3,3,5,7,7‐pentamethyl‐1,2,4‐trioxepane (PMTO), have been studied in details. At moderate temperature, DCP is more prominent for curing the silicone rubber b…
Chitosan/poly(ethylene oxide) (PEO) blends of different component ratios, in the form of films, have been prepared. Structure, hydrophilicity, morphology and thermal behavior of the samples have been examined by Fourier transform infrared spectroscopy (ATR-FTIR), contact angle measurements, atomic force microscopy (AF…
The comproportionation reaction between Mn II and Mn VII sources in the presence of 3,3-dimethylacrylic acid and azides has led to a new {Mn 29 } molecular cluster with a spherical structure and dimensions of ∼2.2 nm, comparable in size to the smallest classical and magnetic nanoparticles.
Organic semiconductors exhibit plenty of attractive properties for use as thermoelectric elements. A comprehensive understanding for the electrical-thermal transport characteristics is crucial to design and fabricate the thermoelectric device. We proposed a theoretical model to investigate the electrical conductivity…
Determining and acting on thermo-physical properties at the nanoscale is essential for understanding/managing heat distribution in micro/nanostructured materials and miniaturized devices. Adequate thermal nano-characterization techniques are required to address thermal issues compromising device performance. Scanning…
To take full advantage of moso bamboo processing waste, bamboo cellulose nanowhiskers were isolated from bamboo residues using sulfuric acid hydrolysis. Changes in bamboo cellulose at different stages of processing, as well as the roles of acid concentrations (55 wt% and 65 wt%) and hydrolysis times (1 h to 5 h) on th…
C NMR, MS and single crystal X-ray diffraction. One photon absorption and emission properties were studied by using a series of UV-visible and fluorescence spectra and theoretical calculations were applied to investigate the structure-property relationships, which showed that all six compounds possessed an obvious int…
ABSTRACT Influence of independent Mg–Al‐layered double hydroxide (LDH), silicate modified expandable graphite (EG), mixture of LDH and EG at various ratios on ethylene vinyl acetate copolymer (EVA) combustion behavior and thermal stability was detected in sequence through the limiting oxygen index (LOI), vertical comb…
Cocrystallization is an emerging method to optimize physicochemical properties of pharmaceutically active compounds including dissolution rate and stability. The main aim of this study was to increase the solubility by cocrystal approach and characterize the cocrystals (1:1) involving tadalafil and salicylic acid whic…
Silver nanoparticles (Ag NPs) embedded and stabilized with polyethylene glycol (PEG) were synthesized as colloids by heating and exposure to sunlight (direct and indirect) irradiation as green method. The deposition of Ag NP-PEGs onto Si-wafers was also made using the electrospray ionization deposition technique. The…