Now showing items 1-20 of 48

    • Liquid metal nanodroplet dynamics inside nanocontainers 

      Jung, Hyun Young; Chun, Hyunkyung; Park, Sora; Kang, Seoung-Hun; Ahn, Chi Won; Kwon, Young-Kyun; Upmanyu, Moneesh; Ajayan, Pulickel M.; Jung, Yung Joon (9/5/2013)
      Here we report direct observations of spatial movements of nanodroplets of Pb metal trapped inside sealed carbon nanocontainers. We find drastic changes in the mobility of the liquid droplets as the particle size increases ...
    • Supercapacitor Operating At 200 Degrees Celsius 

      Borges, Raquel S.; Reddy, Arava Leela Mohana; Rodrigues, Marco-Tulio F.; Gullapalli, Hemtej; Balakrishnan, Kaushik; Silva, Glaura G.; Ajayan, Pulickel M. (9/3/2013)
      The operating temperatures of current electrochemical energy storage devices are limited due to electrolyte degradation and separator instability at higher temperatures. Here we demonstrate that a tailored mixture of ...
    • Roll up nanowire battery from silicon chips 

      Vlad, Alexandru; Reddy, Arava Leela Mohana; Ajayan, Anakha; Singh, Neelam; Gohy, Jean-François; Melinte, Sorin; Ajayan, Pulickel M. (9/18/2012)
      Here we report an approach to roll out Li-ion battery components from silicon chips by a continuous and repeatable etch-infiltratepeel cycle. Vertically aligned silicon nanowires etched from recycled silicon wafers are ...
    • Equilibrium at the edge and atomistic mechanisms of graphene growth 

      Artyukhov, Vasilii I.; Liu, Yuanyue; Yakobson, Boris I. (9/18/2012)
      The morphology of graphene is crucial for its applications, yet an adequate theory of its growth is lacking: It is either simplified to a phenomenological-continuum level or is overly detailed in atomistic simulations, ...
    • Compact solar autoclave based on steam generation using broadband light-harvesting nanoparticles 

      Neumann, Oara; Feronti, Curtis; Neumann, Albert D.; Dong, Anjie; Schell, Kevin; Lu, Benjamin; Kim, Eric; Quinn, Mary; Thompson, Shea; Grady, Nathaniel; Nordlander, Peter; Oden, Maria; Halas, Naomi J. (7/16/2013)
      The lack of readily available sterilization processes for medicine and dentistry practices in the developing world is a major risk factor for the propagation of disease. Modern medical facilities in the developed world ...
    • Paintable Battery 

      Singh, Neelam; Galande, Charudatta; Miranda, Andrea; Mathkar, Akshay; Gao, Wei; Reddy, Arava Leela Mohana; Vlad, Alexandru; Ajayan, Pulickel M. (6/28/2012)
      If the components of a battery, including electrodes, separator, electrolyte and the current collectors can be designed as paints and applied sequentially to build a complete battery, on any arbitrary surface, it would ...
    • Label-free as-grown double wall carbon nanotubes bundles for Salmonella typhimurium immunoassay 

      Punbusayakul, Niramol; Talapatra, Saikat; Ajayan, Pulickel M; Surareungchai, Werasak (6/14/2013)
      Background: A label-free immunosensor from as-grown double wall carbon nanotubes (DW) bundles was developed for detecting Salmonella typhimurium. The immunosensor was fabricated by using the as-grown DW bundles as an ...
    • Hybrid 2D Nanomaterials as Dual-mode Contrast Agents in Cellular Imaging 

      Narayanan, Tharangattu N.; Gupta, Bipin K.; Vithayathil, Sajna A.; Aburto, Rebeca R.; Mani, Sendurai A.; Taha-Tijerina, Jaime; Xie, Bin; Kaipparettu, Benny A.; Torti, Suzy V.; Ajayan, Pulickel M. (6/12/2012)
    • Electrical performance of monolayer MoS2 field-effect transistors prepared by chemical vapor deposition 

      Amani, Matin; Chin, Matthew L.; Birdwell, A. Glen; OメRegan, Terrance P.; Najmaei, Sina; Liu, Zheng; Ajayan, Pulickel M.; Lou, Jun; Dubey, Madan (5/16/2013)
      Molybdenum disulfide (MoS2) field effect transistors (FET) were fabricated on atomically smooth large-area single layers grown by chemical vapor deposition. The layer qualities and physical properties were characterized ...
    • Rapid fabrication of 3D terahertz split ring resonator arrays by novel single-shot direct write focused proximity field nanopatterning 

      Singer, Jonathan P.; Lee, Jae-Hwang; Kooi, Steven E.; Thomas, Edwin L. (4/30/2012)
      For the next generation of phoXonic, plasmonic, optomechanical and microfluidic devices, the capability to create 3D microstructures is highly desirable. Fabrication of such structures by conventional top-down techniques ...
    • Second harmonic microscopy of monolayer MoS2 

      Kumar, Nardeep; Najmaei, Sina; Cui, Qiannan; Ceballos, Frank; Ajayan, Pulickel M.; Lou, Jun; Zhao, Hui (4/15/2013)
      We show that the lack of inversion symmetry in monolayer MoS2 allows strong optical second harmonic generation. The second harmonic of an 810-nm pulse is generated in a mechanically exfoliated monolayer, with a nonlinear ...
    • Hybrid supercapacitor-battery materials for fast electrochemical charge storage 

      Vlad, A.; Singh, N.; Rolland, J.; Melinte, S.; Ajayan, P.M.; Gohy, J.-F. (3/7/2014)
      High energy and high power electrochemical energy storage devices rely on different fundamental working principles - bulk vs. surface ion diffusion and electron conduction. Meeting both characteristics within a single or ...
    • Universal ac conduction in large area atomic layers of CVD-grown MoS2 

      Ghosh, S.; Najmaei, S.; Kar, S.; Vajtai, R.; Lou, J.; Pradhan, N.R.; Balicas, L.; Ajayan, P.M.; Talapatra, S. (3/19/2014)
      Here, we report on the ac conductivity [σ’(ω); 10 mHz < ω < 0.1 MHz] measurements performed on atomically thin, two-dimensional layers of MoS2 grown by chemical vapor deposition (CVD). Σ’(ω) is observed to display a ...
    • Experiments towards size and dopant control of germanium quantum dots for solar applications 

      Oliva-Chatelain, Brittany L.; Barron, Andrew R. (2016)
      While the literature for the doping of silicon quantum dots (QDs) and nanocrystals (NCs) is extensive, reports of doping their germanium analogs are sparse. We report a range of attempts to dope Ge QDs both during and ...
    • A New Imaging Platform for Visualizing Biological Effects of Non-Invasive Radiofrequency Electric-Field Cancer Hyperthermia 

      Corr, Stuart J.; Shamsudeen, Sabeel; Vergara, Leoncio A.; Ho, Jason Chak-Shing; Ware, Matthew J.; Keshishian, Vazrik; Yokoi, Kenji; Savage, David J.; Meraz, Ismail M.; Kaluarachchi, Warna; Cisneros, Brandon T.; Raoof, Mustafa; Nguyen, Duy Trac; Zhang, Yingchun; Wilson, Lon J.; Summers, Huw; Rees, Paul; Curley, Steven A.; Serda, Rita E. (2015)
      Herein, we present a novel imaging platform to study the biological effects of non-invasive radiofrequency (RF) electric field cancer hyperthermia. This system allows for real-time in vivointravital microscopy (IVM) imaging ...
    • A Comprehensive Probabilistic Framework to Learn Air Data from Surface Pressure Measurements 

      Srivastava, Ankur; Meade, Andrew J. (2015)
      Use of probabilistic techniques has been demonstrated to learn air data parameters from surface pressure measurements. Integration of numerical models with wind tunnel data and sequential experiment design of wind tunnel ...
    • Design of a parallel-group balanced controlled trial to test the effects of assist-as-needed robotic therapy 

      Sergi, Fabrizio; Pehlivan, Ali Utku; Fitle, Kyle; Nedley, Kathryn; Yozbatiran, Nuray; Francisco, Gerard E.; O’Malley, Marcia K. (2015)
      In this methods paper, we report on the design of a clinical study testing the efficacy of a newly developed control scheme for robot-aided rehabilitation. To measure the value added by a new control scheme, we pursued a ...
    • Characterization of a hand-wrist exoskeleton, READAPT, via kinematic analysis of redundant pointing tasks 

      Rose, Chad G.; Sergi, Fabrizio; Yun, Youngmok; Madden, Kaci; Deshpande, Ashish D.; O’Malley, Marcia K. (2015)
      Training coordinated hand and wrist movement is invaluable during post-neurological injury due to the anatomical, biomechanical, and functional couplings of these joints. This paper presents a novel rehabilitation device ...
    • Programmable bio-nano-chip system: a flexible point-of-care platform for bioscience and clinical measurements 

      McRae, Michael P.; Simmons, Glennon W.; Wong, Jorge; Shadfan, Basil; Gopalkrishnan, Sanjiv; Christodoulides, Nicolaos; McDevitt, John T. (2015)
      The development of integrated instrumentation for universal bioassay systems serves as a key goal for the lab-on-a-chip community. The programmable bio-nano-chip (p-BNC) system is a versatile multiplexed and multiclass ...
    • Practical high-fidelity frequency-domain force and location identification 

      Ghaderi, Pooya; Dick, Andrew J.; Foley, Jason R.; Falbo, Gregory (2015)
      Identifying the force information and location of an impact event is important for predicting and/or monitoring potential damage to the structures. Directly measuring the impact event and/or locating the impact force is ...