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In this paper a new approach for converting nano-scale mechanical energy into electric energy by piezoelectric zinc oxide nanowire arrays is discussed. The operation mechanism of the nanogenerator relies on the piezoelectric potential created by an external strain; a dynamic straining of the nanowire results in a transient flow of the electrons in the external load due to the driving force of the...
So far the most aggressive manufacturing forecast for 22nm technology node is in late 2011, and there still remains many arguments for its next generation, 15nm manufacturing technologies. The major obstacles in front of the manufacturing are (1) high cost fine patterning technology, (2) tradeoff of SRAM cell size and performance, (3) increasing variability, (4) short channel effect control, etc....
Compact modeling of a Si nanowire MOSFET is discussed. Framework and detailed expression of the compact model for a ballistic Si nanowire MOSFET are provided. The device characteristics of a thin Si nanowire MOSFET is shown as a model calculation, and some characteristic features of the device are explained. Then a new scattering model for a quasi- ballistic Si nanowire MOSFET is introduced, and the...
In this work, two kinds of thermal annealing methods were used to process the silicon wafer by Ge ion bombardment in two steps, dose of 7×1016/cm2 with 150KeV and dose of 2.72×1016/cm2 with 50KeV respectively. In order to control the defects density and Ge distribution in SiGe layer, furnace annealing (FA) and rapid thermal annealing (RTA) schedules were used. It has been found that the FA after ion...
The memory effect in floating nanodot gate field effect transistor (FET) was investigated by fabricating biomineralized inorganic nanodot embedded metal-oxide-semiconductor (MOS) devices. Artificially biomineralized Co oxide cores accommodated in ferritins were utilized as a charge storage node of floating gate memory. Two dimensional array of Co oxide core accommodated ferritin were, after selective...
In this paper we overview recent attempts at co-integrating silicon nano-electro-mechanical systems (NEMS) with nanoelectronic devices aiming to add more functionalities to conventional electronic devices in `More-than-Moore' domain and also explore novel operating principles in `Beyond CMOS' domain.
Nanotube electronics still faces significant challenges such as integration/assembly, co-existence of metallic and semiconducting nanotubes, and air-stable n-type nanotube transistor for complementary circuit operation. Here we report our solutions to these major obstacles, which may eventually lead to realistic and scalable nanotube integrated circuits. We report the wafer-scale synthesis, transfer...
In this paper, the impacts of diameter-dependent annealing (DDA) effect on nanowire S/D extension random dopant fluctuations (SDE-RDF) in silicon nanowire MOSFETs (SNWTs) are investigated, in terms of electrostatic properties, source/drain series resistance (RSD), and driving current. The SDE-RDF induced variations of threshold voltage (Vth) and DIBL in SNWTs with different diameters are found to...
Well-aligned ZnO nanorods were grown on the p-GaN substrate by a hydrothermal method and n-ZnO nanorods/p-GaN heterojunction LED structures were formed. The electroluminescence (EL) properties of this structure were studied under both forward and reverse bias. The nanorod LED device only has light output under reverse bias. The I-V characteristic results show that the nanosized junction can increase...
The effect of isotropic and anisotropic scattering within the drain region of diode with ballistic channel is investigated using the semiclassical Monte Carlo simulation, and the results are discussed. The results show that the isotropic scattering can severely degrade the steady-state current, the electrons mean velocity, and increase the electrons concentration in channel because some hot electrons...
Shaped nanomembranes offer huge potential for integration of novel devices and device concepts on a single chip. We show that strained nanomembranes can form into long-range-ordered wrinkled patterns on rigid and soft substrates, which is exploited to create nanofluidic channel systems and stretchable/flexible magnetoelectronic devices. Nanomembranes can also roll-up into tubular geometries, offering...
We propose the use of bilayer graphene as nanoelectrodes for solid-state nanopore-based DNA sequencing, and perform molecular dynamics simulations and electrical transport property calculations to explore the potential merits of this proposal. The results of our investigation show that compared to single-layer graphene nanoelectrodes, bilayer graphene drastically raises the conductance by 1~2 orders...
Strain has been introduced into the channel region of metal-oxide-semiconductor (MOS) field-effect transistor to improve its operating speed in modern integrated circuits (IC). In this work, we investigated the influence of uniaxial compressive and tensile strains on the nanoscale electrical characteristics of thin gate silicon dioxide (SiO2) films. Both the nanoscale I-V characteristics and cumulative...
Two numerical simulation techniques are presented to investigate the heating issues in nanoscale Si devices. The first one is the Monte Carlo simulation for both electron and phonon transport, and the transient electrothermal analysis is carrier out in n+-n-n+ device with the n-layer length of 10 nm. The second is the molecular dynamics approach for simulating the atomic thermal vibration in the nanoscale...
Quantum-transport simulations of current-voltage characteristics are performed in nanoscale metal-oxide-semiconductor field-effect-transistors. Effects of interface roughness, discrete impurity, and phonon scattering are studied. Band-structure effects in p-type nanowire transistors are also investigated.
The band structure of GNM is studied using TB method. It is found that some surface states appear in the vicinity of the Fermi levels. The electron might be trapped on these surface states due to very large effective mass. The increase of the effective bandgap of GNM as the increase of the radius of the nanohole, may be responsible for the increase of current on/off ratio for GNM devices observed...
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