Ferradas, Ruben R. Marques-Gonzalez, Santiago Osorio, Henrry M. Ferrer, Jaime Cea, Pilar Milan, David C. Vezzoli, Andrea Higgins, Simon J. Nichols, Richard J. Low, Paul J. Garcia-Suarez, Victor M. Martin, Santiago Low variability of single-molecule conductance assisted by bulky metal–molecule contacts RSC ADVANCES 10.1039/c6ra15477h 2016 2016