Highly Effective Conductance Modulation in Planar Silicene Field Effect Devices Due to Buckling

Nanoscale thermal systems that are associated with a pair of electron reservoirs have been previously studied. In particular, devices that adjust electron tunnels relatively to reservoirs’ chemical potentials enjoy the novelty and the potential. Since only two reservoirs and one tunnel exist, however, designers need external aids to complete a cycle, rendering their models non-spontaneous. Here we design thermal conversion devices that are operated among three electron reservoirs connected by energy-filtering tunnels and also referred to as thermal electron-tunneling devices. They are driven by one of electron reservoirs rather than the external power input, and are equivalent to those coupling systems consisting of forward and reverse Carnot cycles with energy selective electron functions. These previously-unreported electronic devices can be used as coolers and thermal amplifiers and may be called as thermal transistors. The electron and energy fluxes of devices are capable of being manipulated in the same or oppsite directions at our disposal. The proposed model can open a new field in the application of nano-devices.

show abstract

“…In Fig. 1(b) , the electron flux, n ij , traveling through the tunnel between two given reservoirs, can be computed by Landauer equation 16 17 as…”

Section: Resultsmentioning

confidence: 99%

Thermal electron-tunneling devices as coolers and amplifiers

Zhang

Chen

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The low current on/off ratio is an indication of the small bandgap of silicene (∼210 meV). 160 This form of silicene was used to fabricate a self-switching diode (SSD), 207 permitting modulation of conductance.…”

Section: Electronic and Optoelectronicmentioning

confidence: 99%

Semiconductor Nanomembrane Materials for High-Performance Soft Electronic Devices

et al. 2018

View full text Add to dashboard Cite

The development of methods to synthesize and physically manipulate extremely thin, single-crystalline inorganic semiconductor materials, so-called nanomembranes, has led to an almost explosive growth of research worldwide into uniquely enabled opportunities for their use in new "soft" and other unconventional form factors for high-performance electronics. The unique properties that nanomembranes afford, such as their flexibility and lightweight characteristics, allow them to be integrated into electronic and optoelectronic devices that, in turn, adopt these unique attributes. For example, nanomembrane devices are able to make conformal contact to curvilinear surfaces and manipulate strain to induce the self-assembly of various 3D nano/micro device architectures. Further, thin semiconductor materials (e.g., Si-nanomembranes, transition metal dichalcogenides, and phosphorene) are subject to the impacts of quantum and other size-dependent effects that in turn enable the manipulation of their bandgaps and the properties of electronic and optoelectronic devices fabricated from them. In this Perspective, nanomembrane synthesis techniques and exemplary applications of their use are examined. We specifically describe nanomembrane chemistry exploiting high-performance materials, along with precise/high-throughput techniques for their manipulation that exemplify their growing capacities to shape outcomes in technology. Prominent challenges in the chemistry of these materials are presented along with future directions that might guide the development of next generation nanomembrane-based devices.

show abstract

“…The same method was used and is described in previous work. 49,50,[62][63][64] Calculation of absolute change in conductance…”

Section: Calculation Of I-v Characteristicsmentioning

confidence: 99%

Tuneable graphene nanopores for single biomolecule detection

et al. 2016

Self Cite

View full text Add to dashboard Cite

Solid-state nanopores are promising candidates for next generation DNA and protein sequencing. However, once fabricated, such devices lack tuneability, which greatly restricts their biosensing capabilities. Here we propose a new class of solid-state graphene-based nanopore devices that exhibit a unique capability of self-tuneability, which is used to control their conductance, tuning it to levels comparable to the changes caused by the translocation of a single biomolecule, and hence, enabling high detection sensitivities. Our presented quantum simulation results suggest that the smallest amino acid, glycine, when present in water and in an aqueous saline solution can be detected with high sensitivity, up to a 90% change in conductance. Our results also suggest that passivating the device with nitrogen, making it an n-type device, greatly enhances its sensitivity, and makes it highly sensitive to not only the translocation of a single biomolecule, but more interestingly to intramolecular electrostatics within the biomolecule. Sensitive detection of the carboxyl group within the glycine molecule, which carries a charge equivalent to a single electron, is achieved with a conductance change that reaches as high as 99% when present in an aqueous saline solution. The presented findings suggest that tuneable graphene nanopores, with their capability of probing intramolecular electrostatics, could pave the way towards a new generation of single biomolecule detection devices.

show abstract

Highly Effective Conductance Modulation in Planar Silicene Field Effect Devices Due to Buckling

Cited by 13 publications

References 41 publications

Thermal electron-tunneling devices as coolers and amplifiers

Thermal electron-tunneling devices as coolers and amplifiers

Semiconductor Nanomembrane Materials for High-Performance Soft Electronic Devices

Tuneable graphene nanopores for single biomolecule detection

Contact Info

Product

Resources

About