A5053732253- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- Topological Materials and Phenomena
- ZnO doping and properties
- Silicone and Siloxane Chemistry
- Nanofabrication and Lithography Techniques
- Advancements in Solid Oxide Fuel Cells
- Advanced Sensor and Energy Harvesting Materials
- Lignin and Wood Chemistry
- Magnetic and transport properties of perovskites and related materials
- Conducting polymers and applications
- Advanced Cellulose Research Studies
- Aerogels and thermal insulation
- Perovskite Materials and Applications
- Catalysis and Hydrodesulfurization Studies
- 2D Materials and Applications
- Nanomaterials for catalytic reactions
- Photosynthetic Processes and Mechanisms
- Advancements in Battery Materials
- Spectroscopy and Quantum Chemical Studies
- Ferroelectric and Piezoelectric Materials
- Advanced Condensed Matter Physics
- Graphene research and applications
University of Connecticut
2017-2025
Yale University
2014-2019
Interface (United States)
2015-2019
University of New Haven
2015-2016
Instituto Politécnico Nacional
2011-2014
Center for Research and Advanced Studies of the National Polytechnic Institute
2010-2014
Significance This paper describes a powerful biodegradable and biocompatible piezoelectric nanofiber platform for significant medical implant applications, including highly sensitive, wireless, force sensor the monitoring of physiological pressures, ultrasonic transducer delivery drugs across blood–brain barrier. Built upon materials commonly utilized in implants, devices can self-degrade, causing no harm to body, avoid any invasive removal surgeries.
Amino acid crystals are an attractive piezoelectric material as they have ultrahigh coefficient and appealing safety profile for medical implant applications. Unfortunately, solvent-cast films made from glycine brittle, quickly dissolve in body fluid, lack crystal orientation control, reducing the overall effect. Here, we present a processing strategy to create biodegradable, flexible, nanofibers of embedded inside polycaprolactone (PCL). The glycine-PCL nanofiber film exhibits stable...
We demonstrate an oxide-stabilized III–V photoelectrode architecture for solar fuel production from water in neutral pH.
The presence of oxygen vacancy sites fundamentally affects physical and chemical properties materials. In this study, a dipole-containing interaction between poly(diallyldimethylammonium chloride) PDDA α-MoO3 is found to enable high-concentrations surface vacancies. Thermal annealing under Ar resulted in negligible reduction MoO3 MoO3- x with = 0.03 at 600 °C. contrast, we show that the thermochemical reaction polyelectrolyte can significantly reduce 0.36 (MoO2.64) H2 gas enhanced...
In this work, we synthesized chiral CsPbBr 3 nanoplatelets using anionic binaphthyl-based ligands. The showed a distinct circular dichroism signal due to the interaction between and ligands on their surface.
There are several examples of double network gels prepared from cellulose nanocrystals (CNC) conjugated with water-soluble polymers. However, soft but tough composed mostly CNCs have been challenging to design due aggregation or precipitation at higher concentrations in solvated and gelled systems. We report a general strategy introduce covalent non-covalent interactions within (CNCs) develop tough, processable, liquid crystalline (LC) gels. A 12-methylene spacer cyanobiphenyl (CB12OH), is...
We observed an unprecedentedly narrow amide I vibrational band from a bacterial biofilm protein at the air/water interface.
Isotopes of an element have the same electron number but differ in neutron and atomic mass. However, due to thickness-dependent properties MX2 (M = Mo, W; X S, Se, Te) transition metal dichalcogenides (TMDs), isotopic effect atomically thin TMDs still remains unclear especially for phonon-assisted indirect excitonic transitions. Here, we report first observation isotope on electronic vibrational a TMD material, using naturally abundant NAWNASe2 isotopically pure 186W80Se2 bilayer single...
Advancements in nanotechnology require the development of nanofabrication methods for a wide range materials, length scales, and elemental distributions. Today’s are typically missing at least one demanded characteristic. Hence, general method enabling versatile remains elusive. Here, we show that, when revealing using underlying mechanisms thermomechanical nanomolding, highly toolbox is result. Specifically, reveal interface diffusion dislocation slip as controlling use their transition to...
Combining functional oxides with conventional semiconductors provides the potential for transformational advancement of microelectronic devices. Harnessing full spectrum oxide functionalities requires current transport between and semiconductor. This aspect is addressed by controlling electronic barrier at an interface a ferroelectric oxide, BaTiO 3 , germanium. For aligned conduction bands germanium as measured spectroscopy, controlled top metal electrode . Capacitance–voltage analysis...
The impact of ferroelectric polarization on the chemical and electronic properties atomically thin layers non-polar chromium oxide deposited positively negatively poled LiNbO3(0001) was studied. Chromium(III) readily forms LiNbO3; however, annealing at high temperatures required to maintain well-ordered films as thickness increased. Prolonged heating these caused Cr diffusion into LiNbO3 substrate. Comparing 2p X-ray photoelectron spectroscopy (XPS) peak positions a function temperature...
SnTe is a topological crystalline insulator that exhibits crystal symmetry protected surface states (SS), which are useful for the development of novel devices, such as low-dissipation transistors. However, major obstacles remain to probe SS and realize application other insulators. Due unintentional doping by Sn vacancies, bulk conduction may overwhelm transport through in SnTe. Synthesis films thin enough suppress has proven difficult due formation discontinuous domain structures. By...
2D electron gases (2DEGs) that form at oxide interfaces provide a rich testbed of phenomena for condensed matter research, with emerging implementations in devices. Integrating such systems semiconductors advances these interesting toward technological applications. This approach further opens prospects new functionalities arising from the potential to couple 2DEG carriers semiconductor. In this work, we demonstrate first integration 2DEGs direct bandgap III-V The growth and structural...
The growth and geometric electronic structures of ${\mathrm{Cr}}_{2}{\mathrm{O}}_{3}$ layers on the polar ZnO surfaces were characterized to determine how substrates can influence properties nonpolar films. X-ray photoelectron spectroscopy, ultraviolet spectroscopy (UPS), high resolution transmission electron microscopy (HRTEM), reflection energy diffraction, low x-ray diffraction (XRD), reflectivity (XRR) employed characterize mode, film quality, interfacial properties. Chromium oxide...
Topological crystalline insulators (TCIs) are new materials with metallic surface states protected by crystal symmetry. The properties of molecular beam epitaxy grown SnTe TCI on SrTiO 3 (001) investigated using scanning tunneling microscopy (STM), noncontact atomic force microscopy, low‐energy and reflection high‐energy electron diffraction, X‐ray Auger spectroscopy, density functional theory. Initially, (111) surfaces observed; however, the dominates increasing film thickness. films grow...
Cubic SnSexTe1-x is expected to be a topological crystalline insulator whose surface states are protected by crystal symmetry. nanoplates with 0 ≤ x 1 synthesized in the cubic and orthorhombic phase show systematic decrease of bulk carrier density increasing x. Metal-to-insulator transition also observed these nanoplates. As service our authors readers, this journal provides supporting information supplied authors. Such materials peer reviewed may re-organized for online delivery, but not...
Adsorptive desulfurization is a promising alternative to hydrodesulfurization for minimizing harmful sulfur emissions from hydrocarbon fuels. Cu in Y zeolite (CuY) has shown effective adsorption, especially when paired with Ce (CuCeY). This study explores other rare earths (REs), including La, Sm, and Nd, RE CuRE mesoporous (SAY) zeolites the adsorption of benzothiophene (BT) dibenzothiophene (DBT). Metal loadings on were quantified by using inductively coupled plasma optic emission...
Organic-inorganic hybrid films were synthesized by a modified sol-gel process. PMMA-SiO2 prepared using methylmethacrylate (MMA), tetraethil-orthosilicate (TEOS) as silicon dioxide source, and 3-trimetoxi-silil-propil-methacrylate (TMSPM) coupling agent. FTIR measurements performed on the to confirm presence of bonding. In addition, metal-insulator-metal (MIM) devices fabricated study dielectric constant function frequency (1 KHz 1 MHz). Electrical results show weak trend with MMA molar...