title: Tunable Band Alignment with Unperturbed Carrier Mobility of On-Surface Synthesized Organic Semiconducting Wires.
abstract: The tunable properties of molecular materials place them among the favorites for a variety of future generation devices. In addition, to maintain the current trend of miniaturization of those devices, a departure from the present top-down production methods may soon be required and self-assembly appears among the most promising alternatives. On-surface synthesis unites the promises of molecular materials and of self-assembly, with the sturdiness of covalently bonded structures: an ideal scenario for future applications. Following this idea, we report the synthesis of functional extended nanowires by self-assembly. In particular, the products correspond to one-dimensional organic semiconductors. The uniaxial alignment provided by our substrate templates allows us to access with exquisite detail their electronic properties, including the full valence band dispersion, by combining local probes with spatial averaging techniques. We show how, by selectively doping the molecular precursors, the product's energy level alignment can be tuned without compromising the charge carrier's mobility.
authors: Dipartimento di Scienze Chimiche, Università Degli Studi di Padova , Padova 35131, Italy.
authors: Andrea
authors: A
authors: Basagni
authors: Donostia International Physics Center (DIPC) , Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain.|Centro de Física de Materiales (CSIC/UPV-EHU), Materials Physics Center , Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain.
authors: Guillaume
authors: G
authors: Vasseur
authors: NCCR MARVEL, Empa, Swiss Federal Laboratories for Materials Science and Technology , Dübendorf CH-8600, Switzerland.
authors: Carlo A
authors: CA
authors: Pignedoli
authors: Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain.
authors: Manuel
authors: M
authors: Vilas-Varela
authors: Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain.
authors: Diego
authors: D
authors: Peña
authors: Dipartimento di Scienze Chimiche, Università Degli Studi di Padova , Padova 35131, Italy.|École Normale Supérieure de Cachan , Cachan 94230, France.
authors: Louis
authors: L
authors: Nicolas
authors: Centro de Física de Materiales (CSIC/UPV-EHU), Materials Physics Center , Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors: Lucia
authors: L
authors: Vitali
authors: Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza , E-50009 Zaragoza, Spain.|Departamento de Física de la Materia Condensada, Universidad de Zaragoza , E-50009 Zaragoza, Spain.
authors: Jorge
authors: J
authors: Lobo-Checa
authors: Donostia International Physics Center (DIPC) , Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain.|Centro de Física de Materiales (CSIC/UPV-EHU), Materials Physics Center , Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain.|Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain.
authors: Dimas G
authors: DG
authors: de Oteyza
authors: Dipartimento di Scienze Chimiche, Università Degli Studi di Padova , Padova 35131, Italy.
authors: Francesco
authors: F
authors: Sedona
authors: Dipartimento di Scienze Chimiche, Università Degli Studi di Padova , Padova 35131, Italy.
authors: Maurizio
authors: M
authors: Casarin
authors: Donostia International Physics Center (DIPC) , Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain.|Centro de Física de Materiales (CSIC/UPV-EHU), Materials Physics Center , Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain.|Departamento de Fisica Aplicada I, Universidad del Pais Vasco , E-20018 San Sebastián, Spain.
authors: J Enrique
authors: JE
authors: Ortega
authors: Dipartimento di Scienze Chimiche, Università Degli Studi di Padova , Padova 35131, Italy.|Consorzio INSTM, Unità di Ricerca di Padova , I-35131 Padova, Italy.
authors: Mauro
authors: M
authors: Sambi
keywords: band structure; doping; on-surface synthesis; poly(para-phenylene); pyridinic functionalization