Recent Submissions

  • Using Nonionic Surfactants for Production of Semiconductor-type Carbon Nanotubes by Gel-based Affinity Chromatography 

    Gangoli, Varun Shenoy; Azhang, Juyan; Willett, Taryn T.; Gelwick, Sean A.; Haroz, Erik H.; Kono, Junichiro; Hauge, Robert H.; Wong, Michael S. (2014)
    Single-wall carbon nanotubes (SWCNTs) have remarkable properties based on their electronic properties, i.e., metallic or semiconducting types, but as-grown SWCNTs contain a mixture of both types. Presented here is an ...
  • Circular Differential Scattering of Single Chiral Self-Assembled Gold Nanorod Dimers 

    Wang, Lin-Yung; Smith, Kyle W.; Dominiquez-Medina, Sergio; Moody, Nicole; Olson, Jana M.; Zhang, Huanan; Chang, Wei-Shun; Kotov, Nicholas; Link, Stephan (2015)
    Circular dichroism spectroscopy is essential for structural characterization of proteins and chiral nanomaterials. Chiral structures from plasmonic materials have extraordinary strong circular dichroism effects compared ...
  • High Chromaticity Aluminum Plasmonic Pixels for Active Liquid Crystal Displays 

    Olson, Jana; Manjavacas, Alejandro; Basu, Tiyash; Huang, Da; Schlather, Andrea E.; Zheng, Bob; Halas, Naomi; Nordlander, Peter; Link, Stephan (2016)
    Chromatic devices such as flat panel displays could, in principle, be substantially improved by incorporating aluminum plasmonic nanostructures instead of conventional chromophores that are susceptible to photobleaching. ...
  • From tunable core-shell nanoparticles to plasmonic drawbridges: Active control of nanoparticle optical properties 

    Byers, Chad P.; Zhang, Hui; Swearer, Dayne F.; Yorulmaz, Mustafa; Hoener, Benjamin S.; Huang, Da; Hoggard, Anneli; Chang, Wei-Shun; Mulvaney, Paul; Ringe, Emilie; Halas, Naomi J.; Nordlander, Peter; Link, Stephan; Landes, Christy F. (2015)
    The optical properties of metallic nanoparticles are highly sensitive to interparticle distance, giving rise to dramatic but frequently irreversible color changes. By electrochemical modification of individual nanoparticles ...
  • Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell 

    Dong, Lei; Yu, Yajun; Li, Chunguang; So, Stephen; Tittel, Frank K. (2015)
    A ppb-level formaldehyde (H2CO) sensor was developed using a thermoelectrically cooled (TEC), continuous-wave (CW) room temperature interband cascade laser (ICL) emitting at 3.59 μm and a miniature dense pattern multipass ...
  • Single-Molecule FRET Studies of HIV TAR–DNA Hairpin Unfolding Dynamics 

    Chen, Jixin; Poddar, Nitesh K.; Tauzin, Lawrence J.; Cooper, David; Kolomeisky, Anatoly B.; Landes, Christy F. (2014)
    We directly measure the dynamics of the HIV trans-activation response (TAR)-DNA hairpin with multiple loops using single-molecule Förster resonance energy transfer (smFRET) methods. Multiple FRET states are identified that ...
  • New approaches in quartz-enhanced photoacoustic sensing 

    Sampaolo, Angelo; Patimisco, Pietro; Pennetta, Riccardo; Scamarcio, Gaetano; Tittel, Frank K. (2015)
    We report on the design and realization of custom quartz tuning forks with different geometries and sizes aimed to improve the photoacoustic effect in quartz-enhanced photoacoustic (QEPAS) sensor systems. A detailed analysis ...
  • Distinguishing between plasmon-induced and photoexcited carriers in a device geometry 

    Zheng, Bob Y.; Zhao, Hangqi; Manjavacas, Alejandro; McClain, Michael; Nordlander, Peter; Halas, Naomi J. (2015)
    The use of surface plasmons, charge density oscillations of conduction electrons of metallic nanostructures, to boost the efficiency of light-harvesting devices through increased light-matter interactions could drastically ...
  • WrAP: Managing Byte-Addressable Persistent Memory 

    Varman, Peter J.; Doshi, Kshitij (2012-10)
    Advances in memory technology are promising the availability of byte-addressable persistent memory as an integral component of future computing platforms. This change has significant implications for software that has ...
  • Bridging the Programming Gap between Persistent and Volatile Memory using WrAP 

    Giles, Ellis; Doshi, Kshitij; Varman, Peter J. (2013-05)
    Advances in memory technology are promising the availability of byte-addressable persistent memory as an integral component of future computing platforms. This change has significant implications for software that has ...
  • Defragmenting the Cloud Using Demand-based Resource Allocation 

    Gulati, Ajay; Varman, Peter J. (2013-06)
    Current public cloud offerings sell capacity in the form of pre-defined virtual machine (VM) configurations to their tenants. Typically this means that tenants must purchase individual VM configurations based on the peak ...
  • Software Support for Atomicity and Persistence in Non-volatile Memory 

    Giles, Ellis; Doshi, Kshitij; Varman, Peter (2013-10)
    Advances in memory technology are promising the availability of byte-addressable persistent memory as an integral component of future computing platforms. This change has significant implications for software that has ...
  • Balancing Fairness and Efficiency in Tiered Storage Systems using Bottleneck-Aware Allocation 

    Varman, Peter J.; Wang, Hui (2014-02)
    Multi-tiered storage made up of heterogeneous devices are raising new challenges in allocating throughput fairly among concurrent clients. The fundamental problem is finding an appropriate balance between fairness to the ...
  • Non-intrusive Persistence with a Backend NVM Controller 

    Pu, Libei; Doshi, Kshitij; Giles, Ellis; Varman, Peter (2015)
    By providing instruction-grained access to vast amounts of persistent data with ordinary loads and stores, byte-addressable storage class memory (SCM) has the potential to revolutionize system architecture. We describe a ...
  • Transaction local aliasing in storage class memory 

    Giles, Ellis; Doshi, Kshitij; Varman, Peter (2015)
    This paper describes a lightweight software library to solve the challenges [6], [3], [1], [5], [2] of programming storage class memory (SCM). It provides primitives to demarcate failure-atomic code regions. SCM loads and ...
  • Photoluminescence of a Plasmonic Molecule 

    Huang, Da; Byers, Chad P.; Wang, Lin-Yung; Hoggard, Anneli; Hoener, Ben; Chang, Wei-Shun; Landes, Christy F.; Link, Stephan (2015)
    Photoluminescent Au nanoparticles are appealing for biosensing and bioimaging applications because of their non-photobleaching and non-photoblinking emission. The mechanism of one-photon photoluminescence from plasmonic ...
  • Direct Plasmon-Driven Photoelectrocatalysis 

    Robatjazi, Hossein; Bahauddin, Shah Mohammad; Doiron, Chloe; Thomann, Isabell (2015)
    Harnessing the energy from hot charge carriers is an emerging research area with the potential to improve energy conversion technologies. Here we present a novel plasmonic photoelectrode architecture carefully designed to ...
  • Distinguishing between plasmon-induced and photoexcited carriers in a device geometry 

    Zheng, Bob Y.; Zhao, Hangqi; Manjavacas, Alejandro; McClain, Michael; Nordlander, Peter (2015)
    The use of surface plasmons, charge density oscillations of conduction electrons of metallic nanostructures, to boost the efficiency of light-harvesting devices through increased light-matter interactions could drastically ...
  • Optimal Matrix Multiplication on Fault Tolerant VLSI Arrays 

    Varman, Peter J.; Ramakrishnan, I.V. (1989-02)
    A fault-tolerant array for matrix multiplication that explicitly incorporates mechanisms for easy testability and reconfigurability is described. All signals in the array travel only a constant distance (independent of ...
  • Efficient Archivable Time Index: A Dynamic Indexing Scheme for Temporal Data 

    Verma, Rakesh M.; Varman, Peter J. (1994)
    We present a practical and asymptotically optimal indexing structure for a versioned timestamped database with step-wise constant data. Three version operations, insertions, updates, and deletes are allowed for the present ...

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