Novel Porphyrin Functionalised Graphene Nanoribbons With Emergent Sensor and Nanoelectronics Applications
We have demonstrated the growth of novel one-dimensional nanostructures by direct integration of porphyrin (Py) molecules into graphene nanoribbons (GNR), via on-surface synthesis methods, using known and novel precursors. These nanostructures, termed porphyrin-functionalised graphene-nanoribbons (Py fGNRs), exhibit significantly different electronic, chemical, transport and optical properties than pure GNR or Py. Developing electronic devices using Py-GNRs has the potential for enhanced and emergent functionality in nanoscale devices In particular, the versatile chemical functionality of the different transition metals within the integrated-porphyrin macrocycle (TM-Py), will determine much of these electronic, optical, and useful chemical properties, as well as defining the exciting transport and spin-transport properties. This project addresses important problems in synthesizing Py- GNRs for use in sensing and electronic applications. Py-fGNRs will be investigated via both Py-fGNR network and individual PyfGNR device integration strategies. Py-fGNR formation by self-assembly from precursor materials through thermally activated reactions will be studied. The physical structure, chemical and electronic properties of Py-fGNRs will be characterised by surface probe microscopies, Raman, optical and synchrotron-based x-ray spectroscopies, by theory and by optical femtosecond pumpprobe experiments. These technically demanding tools will validate our approach, measuring characteristics of Py-fGNRs, allowing for future tailored design and synthesis strategies while exploring initial applications.
Prof. Cormac McGuinness, Trinity College Dublin
Dr. Alexi Preobrajenski, Lund University Sweden
Prof Mathias Senge, Trinity College Dublin