The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Yihui Zhang - One of the best experts on this subject based on the ideXlab platform.

  • mechanics of ultra stretchable self similar serpentine Interconnects
    Acta Materialia, 2013
    Co-Authors: Yihui Zhang, Huanyu Cheng, Jonathan A Fan, Keh Chih Hwang, John A Rogers, Yonggang Huang
    Abstract:

    Electrical Interconnects that adopt self-similar, serpentine layouts offer exceptional levels of stretchability in systems that consist of collections of small, non-stretchable active devices in the so-called island–bridge design. This paper develops analytical models of flexibility and elastic stretchability for such structures, and establishes recursive formulae at different orders of self-similarity. The analytic solutions agree well with finite element analysis, with both demonstrating that the elastic stretchability more than doubles when the order of the self-similar structure increases by one. Design optimization yields 90% and 50% elastic stretchability for systems with surface filling ratios of 50% and 70% of active devices, respectively.

  • buckling in serpentine microstructures and applications in elastomer supported ultra stretchable electronics with high areal coverage
    Soft Matter, 2013
    Co-Authors: Yihui Zhang, Keh Chih Hwang, Juhwa Lee, Joh A Rogers, Yonggang Huang
    Abstract:

    Lithographically defined Electrical Interconnects with thin, filamentary serpentine layouts have been widely explored for use in stretchable electronics supported by elastomeric substrates. We present a systematic and thorough study of buckling physics in such stretchable serpentine microstructures, and a strategic design of the serpentine layout for an ultra-stretchable electrode, via analytical models, finite element method (FEM) computations, and quantitative experiments. Both the onset of buckling and the postbuckling behaviors are examined, to determine scaling laws for the critical buckling strain and the limits of elastic behavior. Two buckling modes, namely the symmetric and anti-symmetric modes, are identified and analyzed, with experimental images and numerical results that show remarkable levels of agreement for the associated postbuckling processes. Based on these studies and an optimization of the design layout, we demonstrate routes for application of serpentine Interconnects in an ultra-stretchable electrode that offer, simultaneously, an areal coverage as high as 81% and a biaxial stretchability as large as ∼170%.

Yung Joon Jung - One of the best experts on this subject based on the ideXlab platform.

  • Highly aligned scalable platinum- decorated single-wall carbon nanotube arrays for nanoscale Electrical Interconnects
    ACS Nano, 2009
    Co-Authors: Yu-seop Kim, Xiaohong An, Swastik Kar, Ahmed A. Busnaina, Morris Washington, Myung Gwan Hahm, S K Nayak, Pulickel Madhavapanicker Ajayan, Bo Li, Li Chen, Yung Joon Jung
    Abstract:

    We present the fabrication and characterization of nanoscale Electrical interconnect test structures constructed from aligned single-wall carbon nanotubes using a template-based fluidic assembly process. This CMOS-friendly process enables the formation of highly aligned parallel nanotube interconnect structures on SiO(2)/Si substrates of widths and lengths that are limited only by lithographical limits and, hence, can be easily integrated onto existing Si-based platforms. These structures can withstand current densities of approximately 10(7) A.cm(-2), comparable or better than copper at similar dimensions. Both the nanotube alignment and failure current density improve with decreasing structure width. In addition, we present a novel Pt nanocluster decoration method that drastically decreases the resistivity of the test structures. Ab initio density functional theory calculations indicate that the increase in conductivity of the nanotubes is caused by an increase in conduction channels close to their Fermi levels due to the platinum nanocluster decoration, with a possible conversion of the semiconducting single-wall carbon nanotubes into metallic ones. These results reflect a huge step toward the proposed replacement of copper-based Interconnects with carbon nanotubes at gigascale integration levels.

Yonggang Huang - One of the best experts on this subject based on the ideXlab platform.

  • mechanics of ultra stretchable self similar serpentine Interconnects
    Acta Materialia, 2013
    Co-Authors: Yihui Zhang, Huanyu Cheng, Jonathan A Fan, Keh Chih Hwang, John A Rogers, Yonggang Huang
    Abstract:

    Electrical Interconnects that adopt self-similar, serpentine layouts offer exceptional levels of stretchability in systems that consist of collections of small, non-stretchable active devices in the so-called island–bridge design. This paper develops analytical models of flexibility and elastic stretchability for such structures, and establishes recursive formulae at different orders of self-similarity. The analytic solutions agree well with finite element analysis, with both demonstrating that the elastic stretchability more than doubles when the order of the self-similar structure increases by one. Design optimization yields 90% and 50% elastic stretchability for systems with surface filling ratios of 50% and 70% of active devices, respectively.

  • buckling in serpentine microstructures and applications in elastomer supported ultra stretchable electronics with high areal coverage
    Soft Matter, 2013
    Co-Authors: Yihui Zhang, Keh Chih Hwang, Juhwa Lee, Joh A Rogers, Yonggang Huang
    Abstract:

    Lithographically defined Electrical Interconnects with thin, filamentary serpentine layouts have been widely explored for use in stretchable electronics supported by elastomeric substrates. We present a systematic and thorough study of buckling physics in such stretchable serpentine microstructures, and a strategic design of the serpentine layout for an ultra-stretchable electrode, via analytical models, finite element method (FEM) computations, and quantitative experiments. Both the onset of buckling and the postbuckling behaviors are examined, to determine scaling laws for the critical buckling strain and the limits of elastic behavior. Two buckling modes, namely the symmetric and anti-symmetric modes, are identified and analyzed, with experimental images and numerical results that show remarkable levels of agreement for the associated postbuckling processes. Based on these studies and an optimization of the design layout, we demonstrate routes for application of serpentine Interconnects in an ultra-stretchable electrode that offer, simultaneously, an areal coverage as high as 81% and a biaxial stretchability as large as ∼170%.

Yu-seop Kim - One of the best experts on this subject based on the ideXlab platform.

  • Highly aligned scalable platinum- decorated single-wall carbon nanotube arrays for nanoscale Electrical Interconnects
    ACS Nano, 2009
    Co-Authors: Yu-seop Kim, Xiaohong An, Swastik Kar, Ahmed A. Busnaina, Morris Washington, Myung Gwan Hahm, S K Nayak, Pulickel Madhavapanicker Ajayan, Bo Li, Li Chen, Yung Joon Jung
    Abstract:

    We present the fabrication and characterization of nanoscale Electrical interconnect test structures constructed from aligned single-wall carbon nanotubes using a template-based fluidic assembly process. This CMOS-friendly process enables the formation of highly aligned parallel nanotube interconnect structures on SiO(2)/Si substrates of widths and lengths that are limited only by lithographical limits and, hence, can be easily integrated onto existing Si-based platforms. These structures can withstand current densities of approximately 10(7) A.cm(-2), comparable or better than copper at similar dimensions. Both the nanotube alignment and failure current density improve with decreasing structure width. In addition, we present a novel Pt nanocluster decoration method that drastically decreases the resistivity of the test structures. Ab initio density functional theory calculations indicate that the increase in conductivity of the nanotubes is caused by an increase in conduction channels close to their Fermi levels due to the platinum nanocluster decoration, with a possible conversion of the semiconducting single-wall carbon nanotubes into metallic ones. These results reflect a huge step toward the proposed replacement of copper-based Interconnects with carbon nanotubes at gigascale integration levels.

C F Quate - One of the best experts on this subject based on the ideXlab platform.

  • characterization of a two dimensional cantilever array with through wafer Electrical Interconnects
    Applied Physics Letters, 2002
    Co-Authors: Eugene M Chow, G G Yaralioglu, C F Quate, Thomas W Kenny
    Abstract:

    The characterization of two-dimensional micromachined silicon cantilever arrays with integrated through-wafer Electrical Interconnects is presented. The approach addresses alignment and density issues associated with operating two-dimensional scanning probe arrays. The tungsten based interconnect (30 μm diameter, 1 Ω resistance) is shown not to degrade the sensitivity of the piezoresistive deflection sensor embedded on each cantilever. Operation of the array (up to 2×7) as a microscope for imaging large areas (3.8×0.45 mm2) and with vertical row stitching is demonstrated with images of samples orders of magnitude larger than images possible with standard atomic force microscope techniques.

  • synthesis of individual single walled carbon nanotubes on patterned silicon wafers
    Nature, 1998
    Co-Authors: Jing Kong, C F Quate, H T Soh, Alan M Cassell, Hongjie Dai
    Abstract:

    Recent progress1,2,3 in the synthesis of high-quality single-walled carbon nanotubes4 (SWNTs) has enabled the measurement of their physical and materials properties5,6,7,8. The idea that nanotubes might be integrated with conventional microstructures to obtain new types of nanoscale devices, however, requires an ability to synthesize, isolate, manipulate and connect individual nanotubes. Here we describe a strategy for making high-quality individual SWNTs on silicon wafers patterned with micrometre-scale islands of catalytic material. We synthesize SWNTs by chemical vapour deposition of methane on the patterned substrates. Many of the synthesized nanotubes are perfect, individual SWNTs with diameters of 1–3 nm and lengths of up to tens of micrometres. The nanotubes are rooted in the islands, and are easily located, characterized and manipulated with the scanning electron microscope and atomic force microscope. Some of the SWNTs bridge two metallic islands, offering the prospect of using this approach to develop ultrafine Electrical Interconnects and other devices.