Influence of surface properties on the electrical conductivity of silicon nanomembranes

Xiang-Fu, Zhao; Scott, Shelley A.; Huang, Minghuang; Peng, Weina; Kiefer, Arnold; Flack, F.; Savage, D. E.; Lagally, M. G.

doi:10.1186/1556-276x-6-402

Cited by 17 publications

(18 citation statements)

References 22 publications

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“…6(a), 8(b) and 8(d)). The conductivity of semiconductor nanomembranes will be sensitive to surface and/or interface properties as the large surface to volume ratio in the nanomembrane reduces the sheet density of dopants, 37 and hence, the influence of dopants on the electrical properties of the nanomembrane. Enhanced electron mobilities have been associated with semiconductor thin films with excellent quality interfaces and surfaces.…”

Section: Resultsmentioning

confidence: 99%

Cathodoluminescence characterization of suspended GaN nanomembranes

Stevens‐Kalceff

Tiginyanu

Popa

et al. 2013

Journal of Applied Physics

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Continuous suspended ∼15 nm thick gallium nitride (GaN) nano-membranes have been investigated using cathodoluminescence microanalysis. The GaN nanomembranes are fabricated by focused ion beam (FIB) pre-treatment of GaN epilayer surfaces followed by photoelectrochemical (PEC) etching. CL microanalysis enables high sensitivity, nanoscale spatial resolution detection of impurities, and defects, and is associated with key features of the suspended GaN nano-membranes. CL spectra and images of the suspended nano-membranes reveal the broad emission band at ∼2.2 eV which is associated with deep acceptor states and the near edge emission at ∼3.4 eV which is associated with free exciton transitions at 295 K. The near edge emission can be resolved into two components, one associated with emission from the nanomembrane and the other associated with CL from underlying GaN transmitted through the nanomembrane. CL spectroscopy gives insight into the physical properties and optical quality of the suspended GaN nano-membranes. Blue shift of the CL near band edge emission indicates that the suspended GaN nanomembranes exhibit the combined effects of quantum confinement and strain.

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Section: Resultsmentioning

confidence: 99%

Cathodoluminescence characterization of suspended GaN nanomembranes

Stevens‐Kalceff

Tiginyanu

Popa

et al. 2013

Journal of Applied Physics

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“…Indeed extensive investigations of the surface of bulk Si after treatment in HF have been conducted in the past decades, revealing that the Si surface is primarily terminated by hydrogen, with some fluorine also detected . As‐released NMs have an identical surface termination as bulk Si treated in HF . Once the NM/PDMS is immersed in solvent, the PMDS starts swelling.…”

Section: Resultsmentioning

confidence: 99%

Facile Fabrication of Ordered Crystalline‐Semiconductor Microstructures on Compliant Substrates

Cavallo

Turner

Lagally

2013

Adv Funct Materials

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Buckling and wrinkling of thin films on a compliant material has proved to be a resource in several applications, such as flexible electronics, thin‐film metrology and fabrication of tunable optical components. A versatile approach for the fabrication of two‐dimensional and linear arrays of buckled structures is demonstrated here using a stiff material, in the form of a nanomembrane, on a compliant substrate. The novelty of the fabrication process is that the substrates are strained by isotropic volume expansion in solvents. This work illustrates in detail the potential of our technology to fabricate ordered arrays of 3D structures on large‐area compliant substrates, with important implications for a large number of fields. Furthermore, this paper discusses the interesting interface chemistry and mechanics leading to controllable and reproducible fabrication of our 3D structures.

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“…More experimental works have recently been done by the same group 63–65. It was found that a 2 × 1 reconstruction is experimentally difficult to obtain.…”

Section: Ultra‐thin Nanomembranesmentioning

confidence: 99%

Cyclization of Synthetic seco‐Proansamitocins to Ansamitocin Macrolactams by Actinosynnema pretiosum as Biocatalyst

et al. 2010

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Conventional solid films on certain substrates play a crucial role in various applications, for example in flat panel displays, silicon technology, and protective coatings. Recently, tremendous attention has been directed toward the thinning and shaping of solids into so‐called nanomembranes, offering a unique and fantastic platform for research in nanoscience and nanotechnology. In this Review, a conceptual description of nanomembranes is introduced and a series of examples demonstrate their great potential for future applications. The thinning of nanomembranes indeed offers another strategy to fabricate nanomaterials, which can be integrated onto a chip and exhibit valuable properties (e.g. giant persistent photoconductivity and thermoelectric property). Furthermore, the stretching of nanomembranes enables a macroscale route for tuning the physical properties of the membranes at the nanoscale. The process by which nanomembranes release from a substrate presents several approaches to shaping nanomembranes into three‐dimensional architectures, such as rolled‐up tubes, wrinkles, and the resulting channels, which can provide fascinating applications in electronics, mechanics, fluidics, and photonics. Nanomembranes as a new type of nanomaterial promise to be an attractive direction for nanoresearch.

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Influence of surface properties on the electrical conductivity of silicon nanomembranes

Cited by 17 publications

References 22 publications

Cathodoluminescence characterization of suspended GaN nanomembranes

Cathodoluminescence characterization of suspended GaN nanomembranes

Facile Fabrication of Ordered Crystalline‐Semiconductor Microstructures on Compliant Substrates

Cyclization of Synthetic seco‐Proansamitocins to Ansamitocin Macrolactams by Actinosynnema pretiosum as Biocatalyst

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