Now showing items 1-15 of 15

    • Angular Radiation Patterns of Nanoantennas: an Optical Yagi-Uda Antenna 

      González Curto, Alberto (Universitat Politècnica de Catalunya, 2009-09-09)
      Master thesis
      Open Access
      We address experimentally the radiation patterns of quantum dots coupled to optical nanoantennas at speci c positions. We show that the emission of the coupled system is determined by a variety of resonant and non-resonant ...
    • Characterization and implementation of resistance-to-time-to-digital readout system for novel photoresistor based on graphene 

      García Gutiérrez, Mario Marcos (Universitat Politècnica de Catalunya, 2017-09-07)
      Master thesis
      Restricted access - confidentiality agreement
    • Detection of graphene motion through light-matter interactions 

      Schädler, Kevin Gerd (Universitat Politècnica de Catalunya, 2012-09-06)
      Master thesis
      Open Access
      [ANGLÈS] In this thesis, we study both experimentally and theoretically the optical detection of the motion of graphene membranes based on fluorescence quenching of the emitters close to graphene. Fluorescence quenching ...
    • Fabrication and characterization of graphene nanostructures 

      Navickaite, Gabriele (Universitat Politècnica de Catalunya, 2012-09-06)
      Master thesis
      Open Access
      [ANGLÈS] We fabricate graphene nanostructures for experimental studies on graphene plasmonics and graphene-quantum dot interactions. We use a focused ion beam to mill structures in a substrate, and deposit graphene on top. ...
    • Infrared Solution‐Processed Quantum Dot Solar Cells Reaching External Quantum Efficiency of 80% at 1.35 µm and Jsc in Excess of 34 mA cm−2 

      Bi, Yu; Pradhan, Santanu; Gupta, Shuchi; Akgul, Mehmet Zafer; Stavrinadis, Alexandros (Wiley, 2018-01-08)
      Article
      Open Access
      Developing low‐cost photovoltaic absorbers that can harvest the short‐wave infrared (SWIR) part of the solar spectrum, which remains unharnessed by current Si‐based and perovskite photovoltaic technologies, is a prerequisite ...
    • Interface Engineering in Hybrid Quantum Dot–2D Phototransistors 

      Kufer, Dominik; Lasanta, Tania; Bernechea, Maria; Koppens, Frank H. L.; Konstantatos, Gerasimos (ACS, 2016-05-31)
      Article
      Open Access
      The hybridization of two-dimensional transition metal dichalcogenides (TMDCs) with colloidal quantum dots (QDs) has been demonstrated to be an ideal platform for low dark-current and highly sensitive photodetection due to ...
    • MoS2-HgTe Quantum Dot Hybrid Photodetectors beyond 2 µm 

      Huo, Nengjie; Gupta, Shuchi; Konstantatos, Gerasimos (Wiley, 2017-05-03)
      Article
      Open Access
      Mercury telluride (HgTe) colloidal quantum dots (CQDs) have been developed as promising materials for the short and mid‐wave infrared photodetection applications because of their low cost, solution processing, and size ...
    • MoS2-HgTe Quantum Dot Hybrid Photodetectors beyond 2 μm 

      Huo, Nengjie; Gupta, Shuchi; Konstantatos, Gerasimos (Wiley, 2017-02-01)
      Article
      Open Access
      Mercury telluride (HgTe) colloidal quantum dots (CQDs) have been developed as promising materials for the short and mid-wave infrared photodetection applications because of their low cost, solution processing and size ...
    • Nanomaterials based microarray platforms for biodetection 

      Morales Narváez, Eden (Universitat Politècnica de Catalunya, 2013-07-21)
      Doctoral thesis
      Open Access
      Analytical disciplines are an important field for the progress of healthcare and medicine. In fact the technologies related to analytical disciplines may reveal important information for early diagnosis, treatment of ...
    • On-chip magneto-immunoassay for Alzheimer's biomarker electrochemical detection by using quantum dots as labels 

      Medina Sánchez, Mariana; Miserere, Sandrine; Morales Narváez, Eden; Merkoçi, Arben (2014-04-15)
      Article
      Restricted access - publisher's policy
      Electrochemical detection of cadmium-selenide/zinc-sulfide (CdSe@ZnS) quantum dots (QDs) as labeling carriers in an assay for apolipoprotein E (ApoE) detection has been evaluated. The immunocomplex was performed by using ...
    • Plasmonically enhanced absorption in colloidal metal/semiconductor nanocomposites 

      García de Arquer, Francisco Pelayo (Universitat Politècnica de Catalunya, 2010-09-09)
      Master thesis
      Open Access
      Colloidal Quantum Dots (CQDs) are the route for low cost high eficiency photodetectors. Photoconductors are limited by the noise arising from high dark current densities, what is typically overcome reducing device's ...
    • Rapid and robust control of single quantum dots 

      Accanto, Nicolò; Roque, Pablo M de; Galvan-Sosa, Marcial; Christodoulou, Sotirios; Moreels, Iwan; Hulst, Niek F van (Nature, 2017-03-10)
      Article
      Open Access
      The combination of single particle detection and ultrafast laser pulses is an instrumental method to track dynamics at the femtosecond time scale in single molecules, quantum dots and plasmonic nanoparticles. Optimal control ...
    • Strategies for controlled electronic doping of colloidal quantum dots 

      Stavrinadis, Alexandros; Konstantatos, Gerasimos (Wiley, 2015-12-07)
      Article
      Open Access
      Over the last several years tremendous progress has been made in incorporating Colloidal Quantum Dots (CQDs) as photoactive components in optoelectronic devices. A significant part of that progress is associated with ...
    • Suppressing Deep Traps in PbS Colloidal Quantum Dots via Facile Iodide Substitutional Doping for Solar Cells with Efficiency >10% 

      Stavrinadis, Alexandros; Pradhan, Santanu; Papagiorgis, Paris; Itskos, Grigorios; Konstantatos, Konstantatos (ACS, 2017-02-28)
      Article
      Open Access
      Surface passivation of PbS colloidal quantum dots (QDs) with iodide has been used in highly efficient solar cells. Iodide passivation is typically achieved by ligand exchange processes on QD films. Complementary to this ...
    • ZnO/PbS quantum dot photovoltaics for heterojunction and bulk nano-heterojunction architectures 

      Chouhan, Ariana (Universitat Politècnica de Catalunya, 2012-09-06)
      Master thesis
      Open Access
      [ANGLÈS] Recent work based on photovoltaic heterojunction devices consisting of n-type ZnO and p-type PbS is developed. We demonstrate that the PbS/metal electrode interface does not necessarily form a Shottky barrier which ...