A5012484573- 2D Materials and Applications
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Graphene research and applications
- Nanowire Synthesis and Applications
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Advanced Sensor and Energy Harvesting Materials
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Carbon Nanotubes in Composites
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Diamond and Carbon-based Materials Research
- Luminescence and Fluorescent Materials
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- Boron and Carbon Nanomaterials Research
- Semiconductor materials and devices
- Quantum and electron transport phenomena
- Energy Harvesting in Wireless Networks
- GaN-based semiconductor devices and materials
Australian National University
2016-2025
Centre for Quantum Computation and Communication Technology
2019-2025
Australian Research Council
2021-2024
University of Canberra
2023
UNSW Sydney
2022
Materials Science & Engineering
2022
Environmental Earth Sciences
2022
ARC Centre of Excellence in Future Low-Energy Electronics Technologies
2018-2021
Canberra (United Kingdom)
2018-2021
ACT Government
2018-2020
Phosphorene is a new family member of two-dimensional materials. We observed strong and highly layer-dependent photoluminescence in few-layer phosphorene (two to five layers). The results confirmed the theoretical prediction that has direct layer-sensitive band gap. also demonstrated more sensitive temperature modulation than graphene MoS2 Raman scattering. anisotropic response enabled us use an optical method quickly determine crystalline orientation without tunneling electron microscopy or...
Metallic and semiconducting carbon nanotubes generally coexist in as-grown materials. We present a gas-phase plasma hydrocarbonation reaction to selectively etch gasify metallic nanotubes, retaining the near-pristine form. With this process, 100% of purely were obtained connected parallel for high-current transistors. The diameter- metallicity-dependent "dry" chemical etching approach is scalable compatible with existing semiconductor processing future integrated circuits.
It has been a long-standing challenge to produce air-stable few- or monolayer samples of phosphorene because thin films degrade rapidly in ambient conditions. Here we demonstrate new highly controllable method for fabricating high quality, with designated number layers ranging from few down monolayer. Our approach involves the use oxygen plasma dry etching thick-exfoliated flakes, layer by atomic precision. Moreover, stabilized monolayer, were able precisely engineer defects first time,...
Hybrid organic-inorganic perovskite materials have received substantial research attention due to their impressively high performance in photovoltaic devices. As one of the oldest functional materials, it is intriguing explore optoelectronic properties after reducing into a few atomic layers which two-dimensional (2D) confinement may get involved. In this work, we report combined solution process and vapor-phase conversion method synthesize 2D hybrid (i.e., CH3NH3PbI3) nanocrystals as thin...
Monolayer phosphorene provides a unique two-dimensional (2D) platform to investigate the fundamental dynamics of excitons and trions (charged excitons) in reduced dimensions. However, owing its high instability, unambiguous identification monolayer has been elusive. Consequently, many important properties, such as exciton dynamics, remain underexplored. We report rapid, noninvasive, highly accurate approach based on optical interferometry determine layer number phosphorene, confirm results...
Abstract Crystalline porous metal–organic frameworks (MOFs) with nanometer‐sized void spaces, large surface areas and ordered reticular motifs have offered a platform for achieving disruptive successes in divisional fields. Great progress exploring the linear nonlinear optical features of MOFs has been achieved, yet third‐order nonlinearities two‐dimensional (2D) rarely studied. Here, broadband amplitude modification phase shift are demonstrated few‐layer nickel‐ p ‐benzenedicarboxylic acid...
The mechanisms, figures of merit, and systems for wearable power generation are reviewed in this article. Future perspectives lie breakthrough technologies fiber electronics, fully printable, flexible SoC, IoT-enabled self-awareness systems.
The presence of a direct band gap and high carrier mobility in few-layer black phosphorus (BP) offers opportunities for using this material infrared (IR) light detection. However, the poor air stability BP its large contact resistance with metals pose significant challenges to fabrication highly efficient IR photodetectors long lifetimes. In work, we demonstrate graphene-BP heterostructure photodetector ultrahigh responsivity long-term at wavelengths. our device architecture, top layer...
Two-dimensional transition-metal dichalcogenides (TMDCs) with intrinsically broken crystal inversion symmetry and large second-order nonlinear responses have shown great promise for future light sources. However, the sub-nanometer monolayer thickness of such materials limits length their interaction light. Here, we experimentally demonstrate enhancement second-harmonic generation from MoSe2 by its integration onto a 220-nm-thick silicon waveguide. Such on-chip allows marked increase in...
Harvesting energy from ubiquitous moisture is attracting growing interest for directly powering electronic devices. However, it still challenging to fabricate high-performing moisture-electric generators (MEGs) with high and stable electric output. Herein, we report a simple strategy modify the oxygen-based groups of graphene oxide using hydrochloric acid treatment, which boosts output based on device structure oxide/polyvinyl alcohol (GO/PVA) MEGs. The resulting MEG enables voltage 0.85 V...
Nanostructured silicon thin film solar cells are promising, due to the strongly enhanced light trapping, high carrier collection efficiency, and potential low cost. Ordered nanostructure arrays, with large-area controllable spacing, orientation, size, critical for reliable light-trapping high-efficiency cells. Available top-down lithography approaches fabricate ordered arrays challenging requirement of both resolution throughput. Here, a novel nano-conical-frustum array structure, exhibiting...
For single-walled carbon nanotube (SWNT) field effect transistors, vertical scaling of high κ dielectrics by atomic layer deposition (ALD) currently stands at ∼8 nm with a subthreshold swing S ≈ 70−90 mV/decade room temperature. ALD on as-grown pristine SWNTs is incapable producing uniform and conformal dielectric due to the lack functional groups nanotubes because nucleation an oxide in process hinges upon covalent chemisorption reactive surfaces. Here, we show that noncovalent...
Molybdenum telluride (MoTe2) has emerged as a special member in the family of two-dimensional transition metal dichalcogenide semiconductors, owing to strong spin-orbit coupling and relatively small energy gap, which offers new applications valleytronic excitonic devices. Here we successfully demonstrated electrical modulation negatively charged (X(-)), neutral (X(0)), positively (X(+)) excitons monolayer MoTe2 via photoluminescence spectroscopy. The binding energies X(+) X(-) were measured...
This paper presents a review on our recent work carbon nanotube field effect transistors, including the development of ohmic contacts, high-κ gate dielectric integration, chemical functionalization for conformal deposition and pushing performance limit FETs by channel length scaling. Due to importance high current operations electronic devices, we also electrical transport properties nanotubes substrates in freely suspended forms. Owing their unique originating from crystalline 1D structure...
We present a systematic experimental investigation of the reactions between hydrogen plasma and single-walled carbon nanotubes (SWNTs) at various temperatures. Microscopy, infrared (IR) Raman spectroscopy, electrical transport measurements are carried out to investigate properties SWNTs after hydrogenation. Structural deformations, drastically reduced conductance, an increased semiconducting nature upon sidewall hydrogenation observed. These changes reversible thermal annealing 500 degrees C...
Single-walled carbon nanotubes (SWNTs) are typically long (greater than or approximately equal 100 nm) and have been well established as novel quasi one-dimensional systems with interesting electrical, mechanical, optical properties. Here, zero-dimensional SWNTs finite lengths down to the molecular scale (7.5 nm in average) were obtained by length separation using a density gradient ultracentrifugation method. Different sedimentation rates of different taken advantage sort according length....
This paper reports the effects of high strains on optoelectronic properties 2D crystals. By realizing micro- and nano-domes made single layer transition-metal dichalcogenides, authors demonstrate possibility to induce a clear-cut crossover from direct indirect bandgap in strained monolayers. The excitons can be harvested potentially stored for long times, which is relevant flexible photovoltaics devices inducing bosonic condensation.
Color centers in solid state crystals have become a frequently used system for single-photon generation, advancing the development of integrated photonic devices quantum optics and communication applications. In particular, defects hosted by two-dimensional (2D) hexagonal boron nitride (hBN) are promising candidate next-generation sources, due to its chemical thermal robustness high brightness at room temperature. The 2D crystal lattice hBN allows extraction efficiency easy integration into...
We introduce Plasmene— in analogy to graphene—as free-standing, one-particle-thick, superlattice sheets of nanoparticles ("meta-atoms") from the "plasmonic periodic table", which has implications many important research disciplines. Here, we report on a general bottom-up self-assembly approach fabricate giant plasmene nanosheets (i.e., with nanoscale thickness but macroscopic lateral dimensions) as thin ∼40 nm and wide ∼3 mm, corresponding an aspect ratio ∼75 000. In conjunction top–down...
Abstract Characteristic for devices based on two-dimensional materials are their low size, weight and power requirements. This makes them advantageous use in space instrumentation, including photovoltaics, batteries, electronics, sensors light sources long-distance quantum communication. Here we present a comprehensive study combined radiation effects Earth’s atmosphere various these nanomaterials. Using theoretical modeling packages, estimate relevant levels then expose field-effect...
Two-dimensional (2D) materials have emerged as promising candidates for miniaturized optoelectronic devices due to their strong inelastic interactions with light. On the other hand, a optical system also requires elastic light-matter control flow of Here we report that single-layer molybdenum disulfide (MoS2) has giant path length (OPL), around one order magnitude larger than from graphene. Using such OPL engineer phase front beams demonstrated, best our knowledge, world's thinnest lens...
Sources of pure and indistinguishable single-photons are critical for near-future optical quantum technologies. Recently, color centers hosted by two-dimensional hexagonal boron nitride (hBN) have emerged as a promising platform high luminosity room temperature single-photon sources. Despite the brightness emitters, spectrum is rather broad purity not sufficient practical information processing. Here, we report integration such emitter hBN into tunable microcavity. A small mode volume order...