Now showing items 1-12 of 12

    • Blueshift of the A-exciton peak in folded monolayer 1H-MoS2 

      Crowne, Frank J.; Amani, Matin; Birdwell, A. Glen; Chin, Matthew L.; OメRegan, Terrance P.; Najmaei, Sina; Liu, Zheng; Ajayan, Pulickel M.; Lou, Jun; Dubey, Madan (2013)
    • Defect-mediated transport and electronic irradiation effect in individual domains of CVD-grown monolayer MoS2 

      Durand, Corentin; Zhang, Xiaoguang; Fowlkes, Jason; Najmaei, Sina; Lou, Jun; Li, An-Ping (2015)
      The authors study the electrical transport properties of atomically thin individual crystalline grains of MoS2ᅠwith four-probeᅠscanning tunneling microscopy.ᅠTheᅠmonolayerᅠMoS2ᅠdomains are synthesized byᅠchemical vapor ...
    • 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 (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 ...
    • Enabling Ultrasensitive Photo-detection Through Control of Interface Properties in Molybdenum Disulfide Atomic Layers 

      Najmaei, Sina; Lei, Sidong; Burke, Robert A.; Nichols, Barbara M.; George, Antony; Ajayan, Pulickel M.; Franklin, Aaron D.; Lou, Jun; Dubey, Madan (2016)
      The interfaces in devices made of two-dimensional materials such as MoS2 can effectively control their optoelectronic performance. However, the extent and nature of these deterministic interactions are not fully understood. ...
    • Enhancing the photocurrent and photoluminescence of single crystal monolayer MoS2ᅠwith resonant plasmonic nanoshells 

      Sobhani, Ali; Lauchner, Adam; Najmaei, Sina; Ayala-Orozco, Ciceron; Wen, Fangfang; Lou, Jun; Halas, Naomi J. (2014)
      Monolayer molybdenum disulfide (MoS2) produced by controlled vapor-phase synthesis is a commercially promising new two-dimensional material for optoelectronics because of its direct bandgap and broad absorption in the ...
    • Growth-substrate induced performance degradation in chemically synthesized monolayer MoS2ᅠfield effect transistors 

      Amani, Matin; Chin, Matthew L.; Mazzoni, Alexander L.; Burke, Robert A.; Najmaei, Sina; Ajayan, Pulickel M.; Lou, Jun; Dubey, Madan (2014)
      We report on the electronic transport properties of single-layer thick chemical vapor deposition (CVD) grown molybdenum disulfide (MoS2) field-effect transistors (FETs) on Si/SiO2 substrates. MoS2 has been extensively ...
    • Metallic 1T phase source/drain electrodes for field effect transistors from chemical vapor deposited MoS2 

      Kappera, Rajesh; Voiry, Damien; Yalcin, Sibel Ebru; Jen, Wesley; Acerce, Muharrem; Torrel, Sol; Branch, Brittany; Lei, Sidong; Chen, Weibing; Najmaei, Sina; Lou, Jun; Ajayan, Pulickel M.; Gupta, Gautam; Mohite, Aditya D.; Chhowalla, Manish (2014)
      Two dimensional transitionmetal dichalcogenides (2D TMDs) offer promise as optoelectronic materials due to their direct band gap and reasonably good mobility values. However, most metals form high resistance contacts on ...
    • Nanoantenna-Enhanced Light-Matter Interaction in Atomically Thin WS2 

      Kern, Johannes; Trügler, Andreas; Niehues, Iris; Ewering, Johannes; Schmidt, Robert; Schneider, Robert; Najmaei, Sina; George, Antony; Zhang, Jing; Lou, Jun; Hohenester, Ulrich; de Vasconcellos, Steffen Michaelis; Bratschitsch, Rudolf (2015)
      Atomically thin transition metal dichalcogenides (TMDCs) are an emerging class of two-dimensional semiconductors. Recently, the first optoelectronic devices featuring photodetection as well as electroluminescence have been ...
    • Second harmonic microscopy of monolayer MoS2 

      Kumar, Nardeep; Najmaei, Sina; Cui, Qiannan; Ceballos, Frank; Ajayan, Pulickel M.; Lou, Jun; Zhao, Hui (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 ...
    • Surface enhanced resonant Raman scattering in hybrid MoSe2@Au nanostructures 

      Abid, Inès; Chen, Weibing; Yuan, Jiangtan; Najmaei, Sina; Peñafiel, Emil C.; Péchou, Renaud; Large, Nicolas; Lou, Jun; Mlayah, Adnen (2018)
      We report on the surface enhanced resonant Raman scattering (SERRS) in hybrid MoSe2@Au plasmonic-excitonic nanostructures, focusing on the situation where the localized surface plasmon resonance of Au nanodisks is finely ...
    • Ternary CuIn7Se11: Towards Ultra-Thin Layered Photodetectors and Photovoltaic Devices 

      Lei, Sidong; Sobhani, Ali; Wen, Fangfang; George, Antony; Wang, Qizhong; Huang, Yihan; Dong, Pei; Li, Bo; Najmaei, Sina; Bellah, James; Gupta, Gautam; Mohite, Aditya D.; Ge, Liehui; Lou, Jun; Halas, Naomi J.; Vajtai, Robert; Ajayan, Pulickel (2014)
      2D materials have been widely studied over the past decade for their potential applications in electronics and optoelectronics. In these materials, elemental composition plays a critical role in defining their physical ...
    • Ultrafast Optical Microscopy of Single Monolayer Molybdenum Disulfide Flakes 

      Seo, Minah; Yamaguchi, Hisato; Mohite, Aditya D.; Boubanga-Tombet, Stephane; Blancon, Jean-Christophe; Najmaei, Sina; Ajayan, Pulickel M.; Lou, Jun; Taylor, Antoinette J.; Prasankumar, Rohit P. (2016)
      We have performed ultrafast optical microscopy on single flakes of atomically thin CVD-grown molybdenum disulfide, using non-degenerate femtosecond pump-probe spectroscopy to excite and probe carriers above and below the ...