Tunable bandgap in silicene and germanene zeyuan ni, qihang liu, kechao tang, jiaxinzheng, jing zhou, rui qin, zhengxianggao, dapeng yu, and jing lu state key laboratory of mesoscopic physics and department of physics, peking university, beijing 100871, p. Sequence of silicon monolayer structures grown on a ru. Despite tight binding models on silicene have been reported in the literature 34, to the best of our knowledge the strain effect on silicene. Application of silicene, germanene and stanene for na or li. Silicene structure, properties and applications michelle. Variation of the electronic properties of the silicene nanosheet passivated by hydrogen. A process for the growth, transfer and fabrication of silicene fieldeffect transistors enables devices that have mobility of about 100 cm2 v. According to deji akinwande, apart from introducing a new player in the playground of 2d materials, silicene, with its close chemical affinity to silicon, suggests an opportunity in the road map. Silicene, the ultimate scaling of a silicon atomic sheet in a buckled honeycomb lattice, represents a monoelemental class of twodimensional 2d materials similar to graphene but with unique potential for a host of exotic electronic properties. Silicene could help create an alternative to graphene, with. Pdf silicene, silicene derivatives, and their device applications.
Ciraci1,2, 1unaminstitute of materials science and nanotechnology, bilkent university, ankara 06800, turkey. Since bulk silicene is a semimetal, with the dirac cone at the fermi energy, one way to achieve the opening of the gap is to restrict the geometry into one dimension. However, so far, the evidence of dirac cones in silicene is highly controversial. How to convert pdf to word without software duration. In addition, carbon dioxide was able to bind onto all the adsorption sites for silicene, unlike aluminum nitride. Electronic properties of a freestanding and epitaxial silicene on a ru substrate. Adsorption behavior of co2 molecule on aln and silicene. Use nitros industryleading pdf to word converter to create better quality doc files than the alternatives. Possible structures for bilayer silicene germanene within silicene. Formation of silicene on a silver surface grey, start of the film. Silicene is the silicon counterpart of graphene, i.
Tunable bandgap in silicene and germanene zeyuan ni, qihang liu, kechao tang, jiaxinzheng, jing zhou, rui qin, zhengxianggao, dapeng yu, and jing lu state key laboratory of mesoscopic physics. It is a twodimensional 2d nanomaterial that is classified as a nanosheet, which has large lateral dimensions up to micrometres. The derived band structures further confirm the absence of dirac cones in any of the silicene phases due to the strong agsi hybridization. Various edge forms of sinrs including armchair edge, zigzag edge. Gated silicene as a tunable source of nearly 100% spin.
The difference could be attributed to the effects of silicenes buckled structure on its surface chemistry. Files are available under licenses specified on their description page. Nevertheless, until now, silicene could only be epitaxially grown on conductive. In the same way the bravais lattice is divided up into wignerseitz cells in the real. Apr 30, 2012 silicene pictured right is more exciting than graphene because, technically, it should be compatible with siliconbased electronics and the huge, existing semiconductor fabrication processes. On top of the silver, silicene islands gradually start to form black, halfway through the film. Despite tight binding models on silicene have been reported in the literature 34, to the best of our knowledge the strain effect on silicene has not been studied from device perspective. Silicene could help create an alternative to graphene. Quantitative determination of atomic buckling of silicene. The trick is to get oxygen molecules to intercalate between the underlayer of silicene, effectively isolating the upper layer of silicene from the metal substrate. Science news was founded in 1921 as an independent, nonprofit source of accurate information on the latest news of science, medicine and technology. Jun 01, 2015 this video shows you how to pronounce silicene.
Effect of strain on electronic transport in silicene. Two and onedimensional honeycomb structures of silicon and. Silicene is a monolayer allotrope of silicon atoms arranged in a honeycomb structure with massless dirac fermion characteristics similar to graphene. Two and onedimensional honeycomb structures of silicon and germanium s.
Silicene, germanene and stanene likely to graphene are atomic thick material with interesting properties. All structured data from the file and property namespaces is available under the creative commons cc0 license. Epitaxy on a transition metal tm substrate is a promising method to produce a variety of two. This free online pdf to doc converter allows you to convert a pdf document to microsoft word doc format, providing better quality than many other converters. Silicene is a twodimensional allotrope of silicon, with a hexagonal honeycomb structure similar to that of graphene. The adsorption of carbon dioxide onto silicene sheets was found to be negative, signifying a possible spontaneous adsorption. Pdf silicene is the silicon counterpart of graphene, i.
Thermal conductivity and spectral phonon properties of. Thermal conductivity and spectral phonon properties of freestanding and supported silicene zuyuan wang, tianli feng, and xiulin ruana school of mechanical engineering and the birck nanotechnology center, purdue university, west lafayette. To convert your pdf to word, drag and drop your pdf file onto the pdf to word converter. English translation of silice collins frenchenglish. Application of silicene, germanene and stanene for na or li ion storage. Contrary to graphene, silicene is not flat, but has a periodically buckled topology. It is a twodimensional 2d nanomaterial that is classified. The lowenergy dirac cone states in silicene lie at the heart of all novel quantum phenomena and potential applications. Silicene, silicene derivatives, and their device applications. Silence definition of silence by the free dictionary.
Nonetheless, there is a lack of experimental studies largely due to. Silicene is a newly discovered material that is one atomic layer think. It also serves as an introduction for researchers entering the field. Jul 29, 2014 researchers want to grow silicene on an insulator, which will interact only weakly, if at all, with the material. Silicene, twodimensional materials, heterostructure, band. We employed firstprinciples density functional theory dft calculations to investigate and compare. Just like graphene, it consists of a single layer of atoms arranged in a honeycomb pattern.
Could graphene, silicene, germanene be minigap semiconductors. The condition or quality of being or keeping still and silent. Silicene, a promising new 2d material sciencedirect. This interest has been motivated by its predicted physical and chemical. The first silicenebased devices, he estimates, are probably a decade away if research continues at its current pace. We report a direct observation of dirac cones in monolayer silicene grown on a ag111 substrate. Ordered chlorinated monolayer silicene structures wenbin li, 1shaoxiang sheng, jian chen, 1peng cheng, lan chen, and kehui wu,2 1institute of physics, chinese academy of science, beijing 100190, china 2collaborative innovation center of quantum matter, beijing 100871, china. Pdf silicene is a twodimensional material, which is composed of a single layer of silicon atoms with sp2sp3 mixed hybridization. Construction of 2d atomic crystals on transition metal. Direct evidence of interactioninduced dirac cones in a. Consecutive transitions between silicene surface phases can be observed by tuning the growth temperature in a quite limited window from 200 to 300c and the deposition flux. Efficiently, silicene stripe arrays could be prepared in large scale on thin silver 110 epitaxial films grown, e. In other words, the resistivity of the silicene decreases.
Quasifreestanding epitaxial silicene on ag111 by oxygen. Graphene is a twodimensional material with unique electronic properties qualitatively different from those of standard semiconductors such as silicon. Dec 20, 2016 silicene is a oneatomthick 2d crystal of silicon. English translation of silice the official collins frenchenglish dictionary online. Thermal conductivity and spectral phonon properties of freestanding and supported silicene zuyuan wang, tianli feng, and xiulin ruana school of mechanical engineering and the birck nanotechnology. With two of these electrons protected in the atomic inner shell, it leaves four electrons in the outer shell.
Silicene fieldeffect transistors operating at room. Researchers want to grow silicene on an insulator, which will interact only weakly, if at all, with the material. Foxits service will then convert your pdf to word and then download your converted file to your desktop. Over 100,000 english translations of french words and phrases. Once chosen, the files can be uploaded to a server using form submission, or manipulated using javascript code and the file api. Ayan datta preprint the binding energy per siatom is 1. In particular, while graphene is perfectly planar, silicene is predicted to be more stable when corrugated, or in another word buckled, in a way in which the two sublattices are displaced. Over the last decade, the existence and stability of silicene has been the subject of much debate. Indeed, field effect transistors fets with a graphenebased channel exhibit poor switching capabilities or, in other words, a low onoff current ratio, which in turn. Silicene is a oneatomthick twodimensional crystal of silicon with a hexagonal lattice structure that is related to that of graphene but with atomic bonds that are buckled rather than flat. Pdf chemical modification of silicene researchgate. New materials research could provide researchers with an alternate material to graphene thats more suited to semiconductor design if they can figure out how to keep silicene, the singleatom. Intrinsic magnetism and spontaneous band gap opening in. In mathematics and solid state physics, the first brillouin zone is a uniquely defined primitive cell in reciprocal space.
Epitaxy on a transition metal tm substrate is a promising method to produce a variety of two dimensional 2d atomic crystals which potentially can be used in next generation electronic devices. Structural stability of functionalized silicene nanoribbons. It merits development of siliconbased multifunctional nanoelectronic and spintronic devices operated at room temperature because of strong spinorbit coupling. It is a twodimensional 2d nanomaterial that is classified as a nanosheet, which has large lateral dimensions up to micrometres, but thicknesses of only nanometres or less. In this paper, we have theoretically investigated the structural stability of edgehydrogenated and edgefluorinated silicene nanoribbons sinrs via firstprinciples calculations.
Convert pdf to word free online pdf to word converter. Convert pdf to word in one click with convertpdftoword. Ciraci1,2, 1unaminstitute of materials science and. The crystal structure of the yet hypothetical, freestanding silicene is. Two and onedimensional honeycomb structures of silicon. Initial geometries, interaction mechanism and high stability of. Intrinsic magnetism and spontaneous band gap opening in bilayer silicene and germanene xinquan wang and zhigang wu a. Silicene structure, properties and applications michelle spencer. However, silicene has a differential value over graphite. Silicene, the ultimate scaling of a silicon atomic sheet in a buckled honeycomb lattice, represents a monoelemental class of twodimensional 2d materials similar to graphene but with unique potential. Pdf application of silicene, germanene and stanene for. Convert and create pdf from various types of files like word doc, excel xls, powerpoint ppt. Silicene is emerging as a twodimensional material with very attractive electronic properties for a wide range of applications. Dec 11, 2014 in particular, while graphene is perfectly planar, silicene is predicted to be more stable when corrugated, or in another word buckled, in a way in which the two sublattices are displaced from each other in the outofplane.
Derived from the latin word carbo or coal, carbon has a total of six electrons. Progress in the materials science of silicene ncbi. Grow it on an insulator and you can use it right away, kara says. This feature alleviates volume changes that occur during charging, approaching the margins offered by graphite, the material that is currently used. Silicene, a novel graphenelike material, has attracted a significant attention because of its potential applications for nanoelectronics. Similar to graphene, zero band gap limits the application of silicene in nanoelectronics despite of its high carrier mobility. Silicene is very strong, like graphene, and that makes for good performance in the anodes of lithiumion batteries. Over the last decade, the existence and stability of silicene. The difference could be attributed to the effects of silicene. Pdf silicene, the ultimate scaling of a silicon atomic sheet in a buckled honeycomb lattice. Silicene the silicon based counterpart of graphene has a two dimensional structure that is responsible for the variety of potentially useful chemical and physical properties.
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