A5023168816- Graphene research and applications
- Nanowire Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Molecular Junctions and Nanostructures
- 2D Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Metamaterials and Metasurfaces Applications
- ZnO doping and properties
- Thermal Radiation and Cooling Technologies
- Graphene and Nanomaterials Applications
- Advanced biosensing and bioanalysis techniques
- Boron and Carbon Nanomaterials Research
- Photonic Crystals and Applications
- Carbon Nanotubes in Composites
- Advanced Sensor and Energy Harvesting Materials
- Terahertz technology and applications
- Transition Metal Oxide Nanomaterials
- Advancements in Battery Materials
- Chemical and Physical Properties of Materials
- Supply Chain and Inventory Management
- Silicon Nanostructures and Photoluminescence
- Technology Assessment and Management
- Surface and Thin Film Phenomena
- Copper Interconnects and Reliability
- Multi-Criteria Decision Making
Chongqing Institute of Green and Intelligent Technology
2014-2024
Chinese Academy of Sciences
2016
Dalian University of Technology
2014
University of Science and Technology of China
2011-2013
Hefei National Center for Physical Sciences at Nanoscale
2011-2012
Graphene has attracted a lot of research interest owing to its exotic properties and wide spectrum potential applications. Chemical vapor deposition (CVD) from gaseous hydrocarbon sources shown great promises for large-scale graphene growth. However, high growth temperature, typically 1000 °C, is required such Here we demonstrate revised CVD route grow on Cu foils at low adopting solid liquid feedstocks. For PMMA polystyrene precursors, centimeter-scale monolayer films are synthesized...
Abstract Graphene plasmons with tightly confined fields and actively tunable resonant frequencies enable the selective detection of molecular vibrational fingerprints ultrahigh sensitivity, significantly promoting development surface‐enhanced infrared absorption spectroscopies (SEIRAS). However, current experimentally obtained enhancements are much smaller than theoretical prediction due to extremely low graphene plasmonic mode energy. In this paper, strategies improve energy theoretically...
Abstract Graphene plasmonic modulators can manipulate the mid‐infrared light in transmission mode, which is currently challenging for traditional liquid crystal and digital micromirror devices, opening up a new avenue infrared scene projection, optical communication, hyper spectra imaging. Nevertheless, their efficiencies are not high enough due to single‐layer atomic thickness low free carrier density of graphene. Here, it demonstrated that modulation efficiency be significantly improved by...
Graphene has attracted intense research interest due to its exotic properties and potential applications. Chemical vapor deposition (CVD) on Cu foils shown great promises for macroscopic growth of high-quality graphene. By delicate design control the CVD conditions, here we demonstrate that a nonequilibrium steady state can be achieved in gas phase along tube, is, active species from methane cracking increase quantity, which results thickness continually graphene grown independently at...
Abstract Ag nanoparticles (NPs) modified graphene nanoribbons (GNRs) are proposed to function as the high‐performance shared substrates for surface‐enhanced Raman and infrared absorption spectroscopy (SERS SEIRAS). This is realized by modulating localized plasmonic resonances of NPs in visible region GNRs mid‐infrared simultaneously, so selectively employ each resonance acquire SERS SEIRAS on a single substrate. As proof concept, prepared fabricating Fabry–Pérot like cavity, followed...
A macroscopic film (2.5 cm × 2.5 cm) made by layer-by-layer assembly of 100 single-layer polycrystalline graphene films is reported. The layers are transferred and stacked one using a wet process that leads to layer defects interstitial contamination. Heat-treatment the sample up 2800 °C results in removal contaminants healing defects. resulting freestanding with near-perfect in-plane crystallinity but mixed stacking order through thickness, which separates it from all existing carbon...
London dispersion force is ubiquitous in nature and increasingly recognized to be an important factor a variety of surface processes. Here we demonstrate unambiguously the decisive role non-equilibrium growth ordered nanostructures on metal substrates using aromatic source molecules. Our first-principles based multi-scale modeling shows that drastic reduction temperature, from ~1000°C ~300°C, can achieved graphene Cu(111) when typical carbon methane replaced by benzene or p-Terphenyl. The...
Highly sensitive short-wave infrared (SWIR) detectors, compatible with the silicon-based complementary metal oxide semiconductor (CMOS) process, are regarded as key enabling components in miniaturized system for weak signal detection. To date, high photogain devices greatly limited by a large bias voltage, low-temperature refrigeration, narrow response band, and complex fabrication processes. Here, we demonstrate detectors working SWIR region at room temperature, which use graphene charge...
Field-effect phototransistors feature gate voltage modulation, allowing dynamic performance control and significant signal amplification. A field-effect phototransistor can be designed to inherently either unipolar or ambipolar in its response. However, conventionally, once a has been fabricated, polarity cannot changed. Herein, polarity-tunable based on graphene/ultrathin Al2O3/Si structure is demonstrated. Light modulate the gating effect of device change transfer characteristic curve from...
Camphor is used to transfer centimeter-scale ultrathin films onto custom-designed substrates for mechanical (tensile) testing. Compared traditional methods using dissolving/peeling remove the support-layers, camphor sublimed away in air at low temperature, thereby avoiding additional stress on as-transferred films. Large-area can be transferred hollow without damage by this method. Tensile measurements are made 300 nm-thick graphene oxide film specimens, much thinner than ≈2 μm minimum...
Abstract A folding technique is reported to incorporate large‐area monolayer graphene films in polymer composites for mechanical reinforcement. Compared with the classic stacking method, strategy results further stiffening, strengthening, and toughening of composite. By using a water–air‐interface‐facilitated procedure, an A5‐size 400 nm thin polycarbonate (PC) film folded half 10 times ≈0.4 mm thick material (1024 layers). large PC/graphene also by same process, resulting composite...
Fast inline characterization of the electrical properties graphene on polymeric substrates is an essential requirement for quality control in industrial production. Here we show that it possible to measure sheet conductivity polymer films by terahertz time-domain spectroscopy (THz-TDS) when all internally reflected echoes substrate are taken into consideration. The measured THz-TDS comparable values obtained from four point probe measurements. maps 25x30 cm2 area were recorded and DC carrier...
Abstract Twin crystals, the formation energy of which is much smaller than that ordinary grain boundaries, widely exist in annealed copper and are hard to eliminate. The study effects twin boundaries on graphene growth great significance understanding epitaxy. However, there few studies process. Here, this article experimentally demonstrates islands subjected different compressive strains from opposite crystal plane after growing across boundary. Further results reveal can grow such as atom...
Abstract Batch production of continuous and uniform graphene films is critical for the application graphene. Chemical vapor deposition (CVD) has shown great promise mass producing high-quality films. However, factors affected uniformity during batch need to be further studied. Herein, we propose a method by controlling gaseous carbon source uniformly distributed near substrate surface. By designing growth space into rectangular channel structure, adjusted velocity feedstock gas flow in...
The graphene/Si heterojunction is attractive for high gain and broadband photodetection through photogating effect. However, the photoresponsivity in these devices are still limited to under 1 A W-1 if no narrowband absorption-enhanced nanostructures were used. In this paper, effects of barriers on photoresponse systematically studied at 1550 nm wavelength. Different barrier heights obtained selection substrates, graphene doping electrical tuning. Lower height side higher silicon found be...
We demonstrate the successful fabrication of various well-ordered 3D gold nanostructure arrays using nanosphere lithography method, and further reveal strong dependence optical responses on their in-plane symmetry. For concentrically stacked ring-cap array, its absorption behavior is similar to that a ring array with same dimension because they have However, for nonconcentrically hole-cap broken symmetry results in appearance crescent-shaped nanogaps at interfaces thus leads novel plasmon...
Single-crystal Cu not only has high electrical and thermal conductivity, but can also be used as a promising platform for the epitaxial growth of two-dimensional materials. Preparing large-area single-crystal foils from polycrystalline emerged most technique in terms its simplicity effectiveness. However, studies on transforming foil into mainly focus influence annealing temperature strain energy recrystallization process copper foil, while effect atmosphere abnormal grain behavior are...
Bernal-stacked (AB-stacked) bilayer graphene has been receiving significant attention because it a tunable band-gap under an applied vertical electric field. Herein, we designed sandwiched structure simply by embedding one piece of Cu sheet into pocket to establish environment that suppresses evaporation and ensures both surfaces are smooth grow large-size (BLG) multilayer (MLG). Single-diffusion double-diffusion mechanisms help explain growth on the sheet, respectively. On basis mechanism,...
<title>Abstract</title> The growth of graphene on Cu via chemical vapor deposition has been well established for producing large-area high-quality films, with transfer to other substrate as an essential step its applications. Various techniques have studied, but real industrial automation operations seldom developed. We report a mesh-reinforced Vaseline-assisted method, which utilizes mesh embedded Vaseline structure, similar reinforced concrete, carrier film transfer. acts adhesive layer...
Flexible photovoltaics with a lightweight and adaptable nature that allows for deployment on curved surfaces in building facades have always been goal vigorously pursued by researchers thin-film solar cell technology. The recent strides made improving the sunlight-to-electricity conversion efficiency of kesterite Cu$_{2}$ZnSn(S, Se)$_{4}$ (CZTSSe) suggest it to be perfect candidate. However, making use rare Mo foil CZTSSe cells causes severe problems thermal expansion matching, uneven grain...
A rapid, nondestructive and high-through quality characterization of large-area graphene films is presented based on the Terahertz (THz) time-domain spectroscopy technology. Sheet conductance was obtained from THz transmission measurement data analysis Fresnel coefficient Tinkham film equation. In comparison to traditional four-point probes method, result showed a quite good consistency. Conductance imaging by method performed used estimate Si substrate.
Graphene is an emerging transparent conductor that plays a potential role in organic optoelectronic device. Here we report the fabrication of polymer light emitting diode employing graphene as anode by solution process. The hydrophobic on PET substrate modified through interface engineering to obtain good poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) wettability, which yields composite electrode with low sheet resistance, high optical transmittance and work function....