Materials Literature
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We present the theoretical modeling and prototype demonstration of a three-dimensional broadband, low-loss, dual-polarization, and high-directivity lens antenna using gradient index (GRIN) metamaterials, which is composed of multi-layer microstrip square-ring arrays. The elements of metamaterials, closed square-ring u…
In this letter, we demonstrate the first BN/graphene/BN field-effect transistor for RF applications. This device structure can preserve the high mobility and the high carrier velocity of graphene, even when it is sandwiched between a substrate and a gate dielectric, and is hence very promising to enable the next gener…
The self-complementary hydrogen bonding ureido-pyrimidinone (UPy) motif is widely used in the design of supramolecular polymers because of its high dimerization constant. Lateral aggregation into fibrous structures is achieved by the addition of urea functions close to the UPy end group of low- T g oligomers, yielding…
Abstract This Feature Article summarizes the recent advances of water‐soluble fluorescent conjugated polyelectrolytes (CPEs) in bioimaging. Apart from a brief overview of traditional linear CPEs, a special emphasis is placed on CPEs that can self‐assemble into or are born with three‐dimensional nano‐architectures, inc…
In the last few decades, nanoparticles (NPs) have been recognized as promising candidates for starting a new revolution in science and technology due to their unusual properties, attracting the attention of physicists, chemists, biologists, and engineers. The aim of this study is to evaluate the toxicities (at both ce…
We derive from first principles an accurate homogenized description of periodic metamaterials made of magnetodielectric inclusions, highlighting and overcoming relevant limitations of standard homogenization methods. We obtain closed-form expressions for the effective constitutive parameters, pointing out the relevanc…
Abstract This report demonstrates the first pH‐dependent synthesis of pepsin‐mediated gold nanoclusters (AuNCs) with blue‐, green‐, and red‐fluorescent emission from Au 5 (Au 8 ), Au 13 , and Au 25 , respectively. Pepsin is a gastric aspartic proteinase (molecular weight, 34 550 g/mol) that plays an integral role in t…
Cancer nanotheranostics aims to combine imaging and therapy of cancer through use of nanotechnology. The ability to engineer nanomaterials to interact with cancer cells at the molecular level can significantly improve the effectiveness and specificity of therapy to cancers that are currently difficult to treat. In par…
The use of hemp fibers as reinforcement in composite materials has increased in recent years as a response to the increasing demand for developing biodegradable, sustainable, and recyclable materials. Hemp fibers are found in the stem of the plant which makes them strong and stiff, a primary requirement for the reinfo…
One-dimensional (1D) ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their current and future diverse technological applications. This article gives a comprehensive overview of the progress that has been…
We present calculations of impact ionization rates, carrier multiplication yields, and solar-power conversion efficiencies in solar cells based on quantum dots (QDs) of a semimetal, α-Sn. Using these results and previous ones on PbSe and PbS QDs, we discuss a strategy to select QDs with the highest carrier multiplicat…
In this work, I propose a statistical mechanical framework, for the evaluation of the free energy in molecular systems, by "deleting" all the molecules in a "single" step. The approach can be considered as the statistical mechanics equivalent of the evaluation of the potential energy in classical mechanics by accounti…
The P+ α-Si /N+ polycrystalline solar cell is molded using the AMPS-1D device simulator to explore the new high efficiency thin film poly-silicon solar cell. In order to analyze the characteristics of this device and the thickness of N+ poly-silicon, we consider the impurity concentration in the N+ poly-silicon layer…
We perform large-scale molecular dynamics simulations to measure the contact-angle hysteresis for a nanodroplet of water placed on a nanopillared surface. The water droplet can be in either the Cassie state (droplet being on top of the nanopillared surface) or the Wenzel state (droplet being in contact with the bottom…
An ongoing effort in the field of nanomedicine is to develop nanoplatforms with both imaging and therapeutic functions, the "nanotheranostics". We have previously developed a human serum albumin (HSA) coated iron oxide nanoparticle (HINP) formula and used multiple imaging modalities to validate its tumor targeting att…
Traditional shape memory polymers (SMPs) are those capable of memorizing a temporary shape and recovering to the permanent shape upon heating. Although such a basic concept has been known for half a century, recent progresses have challenged the conventional understanding of the polymer shape memory effect and signifi…
Purpose This paper aims to examine the present‐day use of, and future prospects for, robots for detecting mines and improvised explosive devices (IEDs), with an emphasis on the key operational requirements. Design/methodology/approach Following an introduction to the impact of mines and IEDs, this paper considers the…
Abstract Magnetic functionalization of carbon nanotubes represents an effective strategy for combining the exceptional structural properties of carbon nanomaterials with the controllability of magnetic nanoparticles. In this study, multi-walled carbon nanotubes (MWCNTs) were functionalized using iron-based magnetic na…
We have developed and applied a mobility edge model that takes into account drift and diffusion currents to characterize the space charge limited current in organic semiconductors. The numerical solution of the drift-diffusion equation allows the utilization of asymmetric contacts to describe the built-in potential wi…
The endothelial lining of the lumen of blood vessels is a key therapeutic target for many human diseases. Polymeric filomicelles that self-assemble from polyethylene oxide (PEO)-based diblock copolymers are long and flexible rather than small or rigid, can be loaded with drugs, and--most importantly--they circulate fo…