Now showing items 1-20 of 1505

    • The opposite effects of sodium and potassium cations on water dynamics 

      Zhang, Qiang; Chen, Hailong; Wu, Tianmin; Jin, Tan; Pan, Zhijun; Zheng, Junrong; Gao, Yiqin; Zhuang, Wei (2017)
      Water rotational dynamics in NaSCN and KSCN solutions at a series of concentrations are investigated using femtosecond infrared spectroscopy and theory. Femtosecond infrared measurements, consistent with previous NMR ...
    • Ultra-High Surface Area Activated Porous Asphalt for CO2 Capture through Competitive Adsorption at High Pressures 

      Jalilov, Almaz S.; Li, Yilun; Tian, Jian; Tour, James M. (2017)
      This study reports an improved method for activating asphalt to produce ultra-high surface area porous carbons. Pretreatment of asphalt (untreated Gilsonite, uGil) at 400 °C for 3 h removes the more volatile organic compounds ...
    • Non-Deprotonative Primary and Secondary Amination of (Hetero)Arylmetals 

      Zhou, Zhe; Ma, Zhiwei; Behnke, Nicole Erin; Gao, Hongyin; Kürti, László (2017)
      Herein we disclose a novel method for the facile transfer of primary (−NH2) and secondary amino groups (−NHR) to heteroaryl- as well as arylcuprates at low temperature without the need for precious metal catalysts, ligands, ...
    • Assessing Inhomogeneity in Sorted Samples of Single-Walled Carbon Nanotubes through Fluorescence and Variance Spectroscopy 

      Kadria-Vili, Yara; Sanchez, Stephen R.; Bachilo, Sergei M.; Weisman, R. Bruce (2017)
      Detailed spectroscopic analysis has been used to study the homogeneity of single-walled carbon nanotube fractions carefully prepared by nonlinear density gradient ultracentrifugation sorting. Two distinct colored bands ...
    • An alternative formula for approximate extended Born inversion 

      Hou, Jie; Symes, William W. (2017)
      Various modifications of reverse time migration (RTM) provide asymptotic inverses to the subsurface offset extended Born modeling operator for constant-density acoustics. These approximate inverses have the same quality ...
    • Giant Terahertz-Wave Absorption by Monolayer Graphene in a Total Internal Reflection Geometry 

      Harada, Yoichi; Ukhtary, Muhammad Shoufie; Wang, Minjie; Srinivasan, Sanjay K.; Hasdeo, Eddwi H.; Nugraha, Ahmad R.T.; Noe, G. Timothy II; Sakai, Yuji; Vajtai, Robert; Ajayan, Pulickel M.; Saito, Riichiro; Kono, Junichiro (2017)
      We experimentally demonstrated significant enhancement of terahertz-wave absorption in monolayer graphene by simply sandwiching monolayer graphene between two dielectric media in a total internal reflection geometry. In ...
    • High Performance Electrocatalytic Reaction of Hydrogen and Oxygen on Ruthenium Nanoclusters 

      Ye, Ruquan; Liu, Yuanyue; Peng, Zhiwei; Wang, Tuo; Jalilov, Almaz S.; Yakobson, Boris I.; Wei, Su-Huai; Tour, James M. (2017)
      The development of catalytic materials for the hydrogen oxidation, hydrogen evolution, oxygen reduction or oxygen evolution reactions with high reaction rates and low overpotentials are key goals for the development of ...
    • Artificial topological models based on a one-dimensional spin-dependent optical lattice 

      Zheng, Zhen; Pu, Han; Zou, Xubo; Guo, Guangcan (2017)
      Topological matter is a popular topic in both condensed matter and cold-atom research. In the past decades, a variety of models have been identified with fascinating topological features. Some, but not all, of the models ...
    • Assessment of the Tao-Mo nonempirical semilocal density functional in applications to solids and surfaces 

      Mo, Yuxiang; Car, Roberto; Staroverov, Viktor N.; Scuseria, Gustavo E.; Tao, Jianmin (2017)
      Recently, Tao and Mo developed a semilocal exchange-correlation density functional. The exchange part of this functional is derived from a density-matrix expansion corrected to reproduce the fourth-order gradient expansion ...
    • Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst 

      Fan, Xiujun; Liu, Yuanyue; Peng, Zhiwei; Zhang, Zhenhua; Zhou, Haiqing; Zhang, Xianming; Yakobson, Boris I.; Goddard, William A. III; Guo, Xia; Hauge, Robert H.; Tour, James M. (2017)
      Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C–GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The ...
    • Destabilization of Surfactant-Dispersed Carbon Nanotubes by Anions 

      Hirano, Atsushi; Gao, Weilu; He, Xiaowei; Kono, Junichiro (2017)
      The colloidal stability of surfactant-dispersed single-wall carbon nanotubes (SWCNTs) is determined by microscopic physicochemical processes, such as association, partitioning, and adsorption propensities. These processes ...
    • Evolutionary dynamics of tree invasions: complementing the unified framework for biological invasions 

      Zenni, Rafael D.; Dickie, Ian A.; Wingfield, Michael J.; Hirsch, Heidi; Crous, Casparus J.; Meyerson, Laura A.; Burgess, Treena I.; Zimmermann, Thalita G.; Klock, Metha M.; Siemann, Evan; Erfmeier, Alexandra; Aragon, Roxana; Montti, Lia; Le Roux, Johannes J. (2017)
      Evolutionary processes greatly impact the outcomes of biological invasions. An extensive body of research suggests that invasive populations often undergo phenotypic and ecological divergence from their native sources. ...
    • Perylene Diimide as a Precise Graphene-like Superoxide Dismutase Mimetic 

      Jalilov, Almaz S.; Nilewski, Lizanne G.; Berka, Vladimir; Zhang, Chenhao; Yakovenko, Andrey A.; Wu, Gang; Kent, Thomas A.; Tsai, Ah-Lim; Tour, James M. (2017)
      Here we show that the active portion of a graphitic nanoparticle can be mimicked by a perylene diimide (PDI) to explain the otherwise elusive biological and electrocatalytic activity of the nanoparticle construct. Development ...
    • Fundamental domains and generators for lattice Veech groups 

      Mukamel, Ronen E. (2017)
      The moduli space QMg of non-zero genus g quadratic differentials has a natural action of G=GL+2(R) / ⟨±(1001) ⟩. The Veech group PSL(X,q) is the stabilizer of (X,q)∈QMg in G. We describe a new algorithm for finding elements ...
    • Evidence that a mitochondrial death spiral underlies antagonistic pleiotropy 

      Stern, Michael (2017)
      The antagonistic pleiotropy (AP) theory posits that aging occurs because alleles that are detrimental in older organisms are beneficial to growth early in life and thus are maintained in populations. Although genes of the ...
    • Phylogenetic analysis of eukaryotic NEET proteins uncovers a link between a key gene duplication event and the evolution of vertebrates 

      Inupakutika, Madhuri A.; Sengupta, Soham; Nechushtai, Rachel; Jennings, Patricia A.; Onuchic, José N.; Azad, Rajeev K.; Padilla, Pamela; Mittler, Ron (2017)
      NEET proteins belong to a unique family of iron-sulfur proteins in which the 2Fe-2S cluster is coordinated by a CDGSH domain that is followed by the “NEET” motif. They are involved in the regulation of iron and reactive ...
    • Tales from the crypt: a parasitoid manipulates the behaviour of its parasite host 

      Weinersmith, Kelly L.; Liu, Sean M.; Forbes, Andrew A.; Egan, Scott P. (2017)
      There are many examples of apparent manipulation of host phenotype by parasites, yet few examples of hypermanipulation—where a phenotype-manipulating parasite is itself manipulated by a parasite. Moreover, few studies ...
    • Diverse Applications of Nanomedicine 

      Pelaz, Beatriz; Alexiou, Christoph; Alvarez-Puebla, Ramon A.; Alves, Frauke; Andrews, Anne M.; Ashraf, Sumaira; Balogh, Lajos P.; Ballerini, Laura; Bestetti, Alessandra; Brendel, Cornelia; Bosi, Susanna; Carril, Monica; Chan, Warren C.W.; Chen, Chunying; Chen, Xiaodong; Chen, Xiaoyuan; Cheng, Zhen; Cui, Daxiang; Du, Jianzhong; Dullin, Christian; Escudero, Alberto; Feliu, Neus; Gao, Mingyuan; George, Michael; Gogotsi, Yury; Grünweller, Arnold; Gu, Zhongwei; Halas, Naomi J.; Hampp, Norbert; Hartmann, Roland K.; Hersam, Mark C.; Hunziker, Patrick; Jian, Ji; Jiang, Xingyu; Jungebluth, Philipp; Kadhiresan, Pranav; Kataoka, Kazunori; Khademhosseini, Ali; Kopeček, Jindřich; Kotov, Nicholas A.; Krug, Harald F.; Lee, Dong Soo; Lehr, Claus-Michael; Leong, Kam W.; Liang, Xing-Jie; Lim, Mei Ling; Liz-Marzán, Luis M.; Ma, Xiaowei; Macchiarini, Paolo; Meng, Huan; Möhwald, Helmuth; Mulvaney, Paul; Nel, Andre E.; Nie, Shuming; Nordlander, Peter; Okano, Teruo; Oliveira, Jose; Park, Tai Hyun; Penner, Reginald M.; Prato, Maurizio; Puntes, Victor; Rotello, Vincent M.; Samarakoon, Amila; Schaak, Raymond E.; Shen, Youqing; Sjöqvist, Sebastian; Skirtach, Andre G.; Soliman, Mahmoud G.; Stevens, Molly M.; Sung, Hsing-Wen; Tang, Ben Zhong; Tietze, Rainer; Udugama, Buddhisha N.; VanEpps, J. Scott; Weil, Tanja; Weiss, Paul S.; Willner, Itamar; Wu, Yuzhou; Yang, Lily; Yue, Zhao; Zhang, Qian; Zhang, Qiang; Zhang, Xian-En; Zhao, Yuliang; Zhou, Xin; Parak, Wolfgang J. (2017)
      The design and use of materials in the nanoscale size range for addressing medical and health-related issues continues to receive increasing interest. Research in nanomedicine spans a multitude of areas, including drug ...
    • Resonant Coupling between Molecular Vibrations and Localized Surface Plasmon Resonance of Faceted Metal Oxide Nanocrystals 

      Agrawal, Ankit; Singh, Ajay; Yazdi, Sadegh; Singh, Amita; Ong, Gary K.; Bustillo, Karen; Johns, Robert W.; Ringe, Emilie; Milliron, Delia J. (2017)
      Doped metal oxides are plasmonic materials that boast both synthetic and postsynthetic spectral tunability. They have already enabled promising smart window and optoelectronic technologies and have been proposed for use ...
    • Shot noise detection in hBN-based tunnel junctions 

      Zhou, Panpan; Hardy, Will J.; Watanabe, Kenji; Taniguchi, Takashi; Natelson, Douglas (2017)
      High quality Au/hBN/Au tunnel devices are fabricated using transferred atomically thin hexagonal boron nitride as the tunneling barrier. All tunnel junctions show tunneling resistance on the order of several kΩ/μm2. Ohmic ...