By Mircea Dragoman, Daniela Dragoman
This e-book is devoted to the hot two-dimensional one-atomic-layer-thick fabrics corresponding to graphene, steel chalcogenides, silicene and different 2nd fabrics. The booklet describes their major actual homes and functions in nanoelctronics, photonics, sensing and computing. a wide a part of the e-book offers with graphene and its outstanding actual properties. one other vital a part of the publication bargains with semiconductor monolayers akin to MoS2 with striking functions in photonics, and electronics. Silicene and germanene are the atom-thick opposite numbers of silicon and germanium with notable purposes in electronics and photonics that are nonetheless unexplored. Consideration of two-dimensional electron fuel devices conclude the remedy. The physics of 2DEG is defined intimately and the purposes in THz and IR zone are discussed.
Both authors are operating presently on those 2nd fabrics constructing idea and applications.
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Extra info for 2D Nanoelectronics: Physics and Devices of Atomically Thin Materials (NanoScience and Technology)
31 The graphene FET with a fork-like gate S G D Graphene area S 32 1 2D Carbon-Based Nanoelectronics S Dielectric G D Graphene S Fig. 32 Coplanar graphene FET electrodes S S D G Fig. 33 SEM image of graphene FET with fork-like gate (from Deligeorgis et al. 2010) In Fig. 35 we have represented with dashed line the mobility of a coplanar graphene FET as a function of the drain voltage, when the top gate voltage is zero. From this ﬁgure it follows that the peak mobility is of 9000 cm2/V s at a drain voltage of 3 V while at VD = 4 V there is a drop in mobility, which corresponds to the position of the Dirac point.
The development of graphene FETs on flexible substrates is encouraged by the exceptional mechanical properties of graphene (Lee et al. 2008). In particular, the Young elastic modulus of monolayer graphene is 1 Tpa, conferring to this material a large bending ability, while the breaking strength is 42 N/m, graphene being stronger than steel. In this respect, it was recently demonstrated that multilayer graphene could be used as body armor against bullets (Lee et al. 2014). In addition, stretching of graphene is impressive.
The dependence of the amplitude of the demodulated RF signal on frequency is illustrated in Fig. 65 for various DC current Iav values: 1 mA (gray thin line), 2 mA (black line) and 3 mA (gray thick line). 5 GHz. 2 Nanoelectronics on 2D Carbon-Based Materials 53 Fig. 63 Current-voltage dependence of the coplanar line patterned over graphene monolayer (from Dragoman et al. 2012a, b) Bias tee 2 Current source (from Keithley 4200 SCS) AM microwave generator I + V Bias tee 1 CPW on graphene Amplifier (LNA) Fig.