A5101580743- 2D Materials and Applications
- Graphene research and applications
- MXene and MAX Phase Materials
- Advanced Thermoelectric Materials and Devices
- Perovskite Materials and Applications
- Topological Materials and Phenomena
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Advanced Sensor and Energy Harvesting Materials
- Advanced biosensing and bioanalysis techniques
- Chalcogenide Semiconductor Thin Films
- Transition Metal Oxide Nanomaterials
- Respiratory viral infections research
- Animal Disease Management and Epidemiology
- Influenza Virus Research Studies
- Gas Sensing Nanomaterials and Sensors
- Advanced Memory and Neural Computing
- Photonic and Optical Devices
- Molecular Sensors and Ion Detection
- Nanowire Synthesis and Applications
- Nanoparticle-Based Drug Delivery
- Bone Tissue Engineering Materials
- Analytical Chemistry and Sensors
- Graphene and Nanomaterials Applications
- Silk-based biomaterials and applications
Cornell University
2023-2024
Liaocheng University
2022-2024
Yale University
2021-2023
University of California, Davis
2018-2021
University of Central Florida
2019-2021
John Brown University
2018
Providence College
2018
Brown University
2014-2018
Shenyang Pharmaceutical University
2016
University of Science and Technology of China
2012-2014
A highly-sensitive ammonia (NH3) gas sensor based on molybdenum trioxide nanoribbons was developed in this study. α-MoO3 (MoO3 NRs) were successfully synthesized via a hydrothermal method and systematically characterized using various advanced technologies. Following simple drop-cast process, high-performance chemiresistive NH3 fabricated through the deposition of MoO3 NR sensing film onto Au interdigitated electrodes. At an optimal operation temperature 450 °C, nanoribbon-based exhibited...
While various effects of physicochemical parameters (e.g., size, facet, composition, and internal structure) on the catalytic efficiency nanozymes (i.e., nanoscale enzyme mimics) have been studied, strain effect has never reported understood before. Herein, we demonstrate in by using Pd octahedra icosahedra with peroxidase-like activities as a model system. Strained were found to display 2-fold higher than unstrained octahedra. Theoretical analysis suggests that tensile is more beneficial OH...
Molybdenum trioxide (α-MoO3) is a 2D layered oxide with use in electrochromic and photochromic devices owing to its ability reversibly change color between transparent light blue electrochemical or hydrogen intercalation. Despite significant application potential, MoO3 performance largely limited by the destructiveness of these intercalation techniques, insignificant coloration, slow response. We demonstrate reversible chemochromic method, using zerovalent metals into α-MoO3 nanoribbons (Sn,...
Compared to 1H MRI, 19F MRI provides higher selectivity but lower sensitivity. Therefore, the need inject high doses of probe improve its sensitivity for in vivo diagnosis remains a challenge. A "smart" strategy is needed that could locally concentrate low-dose while avoiding fast transverse relaxation probes. Locally self-assembling and disassembling nanoparticles may be an optimal measure achieve this goal. Herein, we report dual-functional 1 glutathione (GSH)-controlled self-assembly...
The discovery of novel large band gap two-dimensional (2D) materials with good stability and high carrier mobility will innovate the next generation electronics optoelectronics. A new allotrope 2D violet phosphorus P11 was synthesized via a salt flux method in presence bismuth. Millimeter-sized crystals violet-P11 were collected after removing DI water. From single-crystal X-ray diffraction, crystal structure determined to be monoclinic space group C2/c (no. 15) unit cell parameters =...
We demonstrate the intercalation of multiple zero-valent atomic species into two-dimensional (2D) layered Bi2Se3 nanoribbons. Intercalation is performed chemically through a stepwise combination disproportionation redox reactions, hydrazine reduction, or carbonyl decomposition. Traditional electrochemical thus limiting intercalant guests to single species. show that atoms can be intercalated this chemical route host lattice 2D crystal. Intermetallic exhibit unique structural ordering...
Platinum diselenide (PtSe2) is an emerging class of two-dimensional (2D) transition-metal dichalcogenide (TMD) crystals recently gaining substantial interest, owing to its extraordinary properties absent in conventional 2D TMD layers. Most interestingly, it exhibits a thickness-dependent semiconducting-to-metallic transition, i.e., thick PtSe2 layers, which are intrinsically metallic, become semiconducting with their thickness reduced below certain point. Realizing both and metallic phases...
Platinum ditelluride (PtTe2) is an emerging semimetallic two-dimensional (2D) transition-metal dichalcogenide (TMDC) crystal with intriguing band structures and unusual topological properties. Despite much devoted efforts, scalable controllable synthesis of large-area 2D PtTe2 well-defined layer orientation has not been established, leaving its projected structure-property relationship largely unclarified. Herein, we report a low-temperature growth layers on area greater than few square...
Abstract The intercalation of layered compounds opens up a vast space new host–guest hybrids, providing routes for tuning the properties materials. Here, it is shown that uniform and continuous layers copper can be intercalated within van der Waals gap bulk MoS 2 resulting in unique Cu–MoS hybrid. hybrid, which remains semiconducting, possesses plasmon resonance at an energy ≈1eV, giving rise to enhanced optoelectronic activity. Compared with high‐performance photodetectors, copper‐enhanced...
The continued evolution and emergence of novel influenza viruses in wild domestic animals poses an increasing public health risk. Two human cases H3N8 avian virus infection China 2022 have caused concern regarding the risk transmission between birds humans. However, prevalence their natural reservoirs biological characteristics are largely unknown. To elucidate potential threat viruses, we analyzed five years surveillance data obtained from important wetland region eastern evaluated...
Ferroelectric semiconductors have been predicted to exhibit strong zero-bias shift current, spurring the search for ferroelectric with band gaps in visible range as candidates so-called current photovoltaics efficiencies not constrained by Schockley–Queisser limit. Recent theoretical works that two-dimensional IV–VI monochalcogenides are multiferroic and capable of generating significant currents. Here we present experimental validation this prediction, observing ultrafast currents detecting...
We report the synthesis of high-quality single-crystal two-dimensional, layered nanostructures silicon telluride, Si2Te3, in multiple morphologies controlled by substrate temperature and Te seeding. Morphologies include nanoribbons formed VLS growth from droplets, vertical hexagonal nanoplates through vapor–solid crystallographically oriented on amorphous oxide substrates, flat large-area liquid pools. show potential for doping choice conditions. Vertical grown sapphire example, can...
Multiple polytypes of MoTe2 with distinct structures and intriguing electronic properties can be accessed by various physical chemical approaches. Here, we report electrochemical lithium (Li) intercalation into 1T′-MoTe2 nanoflakes, leading to the discovery two previously unreported lithiated phases. Distinguished their structural differences from pristine 1T′ phase, these phases were characterized using in situ polarization Raman spectroscopy single-crystal X-ray diffraction. The exhibit...
A major outstanding challenge in the field of intercalation chemistry has been insertion heavy metals into a 2D layered material. Heavy metal is promising route towards access chemically tailored materials or enhancement novel physics. We present new series wet chemical strategies to intercalate atomic and semimetal species (Bi, Cr, Ge, Mn, Mo, Ni, Os, Pb, Pd, Pt, Rh, Ru, Sb, W) chalcogenides. Bismuth selenide, Bi2Se3, niobium diselenide, NbSe2, are used demonstrate this chemistry. Atomic...
Advances in modern electronic technologies have been driven toward combining the continued miniaturization of device components and their deterministic integration onto unconventional platforms. This effort aims at achieving devices various form factors with exotic functionalities, which has foreseen to be impossible any traditional approaches. Amongst a variety futuristic technologies, mechanically reconfigurable can reversibly stretched, twisted, folded under severe mechanical deformation...
Silicon telluride (Si2Te3) is a two-dimensional, layered, p-type semiconductor that shows broad near-infrared photoluminescence. We show how, through various means of chemical modification, Si2Te3 can have its optoelectronic properties modified in several independent ways without fundamentally altering the host crystalline lattice. Substitutional doping with Ge strongly red-shifts photoluminescence while substantially lowering direct and indirect band gaps optical phonon modes. Intercalation...
The surface functionalization of two-dimensional (2D) materials with organic electron donors (OEDs) is a powerful tool to modulate the electronic properties material. Here we report novel molecular dopant, Me-OED, that demonstrates record-breaking doping MoS2, achieving carrier density 1.10 ± 0.37 × 1014 cm-2 at optimal conditions; achieved much higher than those by other OEDs such as benzyl viologen and an OED based on 4,4'-bipyridine. This impressive power attributed compact size which...
A general solution-based approach to deintercalate zero-valent tin and copper from two-dimensional layered chalcogenides is presented using a one-step comproportionation reduction–oxidation reaction. The reaction performed between the intercalated metal high oxidation state cations (Sn4+ Cu2+) dissolved in acetone. This chemistry shown work for variety of with differing morphologies crystallinity. Copper are deintercalated powders MoS2, MoSe2, NbSe2, WS2 crystalline nanoribbons Bi2Se3,...
Two-dimensional (2D) transition metal dichalcogenide (TMD) layers have gained increasing attention for a variety of emerging electrical, thermal, and optical applications. Recently developed metallic 2D TMD been projected to exhibit unique attributes unattainable in their semiconducting counterparts; e.g., much higher electrical thermal conductivities coupled with mechanical flexibility. In this work, we explored platinum ditelluride (2D PtTe2) - relatively new class TMDs by studying...
A new polytype of WTe2 with a bandgap has been recently discovered through the intercalation lithium into van der Waals gaps Td-WTe2. Here, we report effects reduced thicknesses and heterointerfaces on intercalation-induced phase transition in WTe2. Using situ Raman spectroscopy during electrochemical lithiation flakes as function flake thickness, observe that additional energy is required for from Td to lithiated Td′ phase, going 0.8 V applied voltage thick 0.5 0.3 7- 5-layered samples,...
Intercalation of alkali metals is widely studied to introduce a structural phase transition from 2H 1T′ in 2D group VI metal dichalcogenides (TMDCs). This highly efficient method has enabled an access library phases with novel physical and chemical properties attractive for functional devices electrochemical catalysis. However, despite numerous studies that have predicted charge doping mainly contributes the intercalation process, mechanistic understanding at atomic level not been fully...
Abstract Synthesis of transition metal dichalcogenides (TMDCs) has been achieved through the direct conversion and metal‐oxide films, demonstrating ability to grow large area thin films with uniform thickness on a variety substrates control over growth orientation (horizontal vs vertical) TMDC layers. However, synthesized often exhibit small grains are more defective than their bulk counterparts. This is especially true for 2D telluride due low reactivity between tellurium metals such as W...
A new 2D nanomaterial testing prioritization framework based on media specific chemical behavior.