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- Van der Zant, H.S.J. (author) doctoral thesis 1991
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Kervennic, Y.V. (author), Van der Zant, H.S.J. (author), Morpurgo, A.F. (author), Gurevich, L. (author), Kouwenhoven, L.P. (author)We have fabricated pairs of platinum electrodes with separation between 20 and 3.5 nm. Our technique combines electron beam lithography and chemical electrodeposition. We show that the measurement of the conductance between the two electrodes through the electrolyte provides an accurate and reproducible way to control their separation. We have...journal article 2002
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Kervenic, Y.V. (author), Van der Zant, S.J. (author), Morpurgo, A. (author), Gurevich, L. (author), Kouwenhoven, L.P. (author)A method of reducing the distance between electrodes, comprising the growth of electrodes by means of electrodeposition in a solution, wherein during the process of growth the conductance over the electrodes is measured and the method is terminated when the conductance has reached a predetermined value. The method according to the invention is...patent 2003
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Kervennic, Y.V. (author), Vanmaekelbergh, D. (author), Kouwenhoven, L.P. (author), Van der Zant, H.S.J. (author)We have developed a technology to reproducibly make gaps with distance control on the single-atom scale. The gold contacts are flat on the nanometer scale and are fabricated on an oxidized aluminum film that serves as a gate. We show that these contacts are clean and can be stabilized via chemical functionalization. Deposition of conjugated...journal article 2003
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Slot, E. (author), Holst, M.A. (author), Van der Zant, H.S.J. (author)We have investigated transport characteristics of charge-density wave nanowires with a few hundred parallel chains. At temperatures below50K, these samples show power-law behavior in temperature and voltage, characteristic for one-dimensional transport. In this regime, gate dependent transport has been observed.journal article 2005
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O´Neill, K. (author), Slot, E. (author), Thorne, R. (author), Van der Zant, H. (author)We have investigated the electrical transport properties of insulating and metallic constrictions of dimensions 100nm-10_m in the charge-density wave (CDW) conductor NbSe3. The constrictions are made in a variety of ways: focused ion beam, reactive ion etching through a resist mask, and in a mechanicallycontrolled break junction configuration....journal article 2005
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O'Neill, K. (author), Osorio, E.A. (author), Van der Zant, H.S.J. (author)The authors present results on electromigrated Au nanojunctions broken near the conductance quantum of 77.5??S. At room temperature it is found that wires, initially narrowed by an actively-controlled electromigration technique down to a few conductance quanta, continue to narrow after removing the applied voltage. Separate electrodes form as...journal article 2007
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Heersche, H.B. (author), Lientschnig, G. (author), O'Neill, K. (author), Van der Zant, H.S.J. (author), Zandbergen, H.W. (author)The authors imaged electromigration-induced nanogap formation in situ by transmission electron microscopy. Real-time video recordings show that edge voids form near the cathode side. The polycrystalline gold wires narrow down until a single-grain boundary intersects the constriction along which the breaking continues. During the last 50?ms of...journal article 2007
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Poot, M. (author), Van der Zant, H.S.J. (author)We have measured the mechanical properties of few-layer graphene and graphite flakes that are suspended over circular holes. The spatial profile of the flake’s spring constant is measured with an atomic force microscope. The bending rigidity of and the tension in the membranes are extracted by fitting a continuum model to the data. For flakes...journal article 2008
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Witkamp, B. (author), Poot, M. (author), Pathangi, H. (author), Hüttel, A.K. (author), Van der Zant, H.S.J. (author)We have fabricated suspended metal paddle resonators with carbon nanotubes functioning as self-detecting torsional springs. We observe gate-tunable resonances that either tune to higher or to lower frequencies when increasing the dc voltage on the back gate. We attribute the former modes to flexural vibrations of the paddle resonator, while the...journal article 2008
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Venstra, W.J. (author), Van der Zant, H.S.J. (author)We present a method for efficient spectral readout of mechanical resonator arrays in dissipative environments. Magnetomotive drive and detection are used to drive double clamped resonators in the nonlinear regime. Resonators with almost identical resonance frequencies can be tracked individually by sweeping the drive power. Measurements are...journal article 2008
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Babaei Gavan, K. (author), Van der Drift, E.W.J.M. (author), Venstra, W.J. (author), Zuiddam, M.R. (author), Van der Zant, H.S.J. (author)We present a systematic investigation of the dynamic properties of silicon nitride cantilevers in air. The thermal noise spectra of cantilevers have been measured using a home-made optical deflection setup. Torsional and flexural resonances up to the seventh mode are observed. The dependence of resonance frequencies on the dimensions and mode...journal article 2009
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Prins, F. (author), Hayashi, T. (author), De Vos van Steenwijk, B.J.A. (author), Gao, B. (author), Osorio, E.A. (author), Muraki, K. (author), Van der Zant, H.S.J. (author)We present a method to make Pt nanometer-spaced electrodes that are free of metallic particles and stable at ambient conditions. The nanogaps are fabricated using feedback-controlled electromigration to form few-atom contacts. When performing this procedure at elevated temperatures (>420?K), the Pt contacts undergo self-breaking so that...journal article 2009
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Hüttel, A.K. (author), Witkamp, B. (author), Leijnse, M. (author), Wegewijs, M.R. (author), Van der Zant, H.S.J. (author)Low-temperature transport spectroscopy measurements on a suspended few-hole carbon nanotube quantum dot are presented, showing a gate-dependent harmonic excitation spectrum which, strikingly, occurs in the Coulomb-blockade regime. The quantized excitation energy corresponds to the scale expected for longitudinal vibrations of the nanotube. The...journal article 2009
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Babaei Gavan, K. (author), Westra, H.J.R. (author), Van der Drift, E.W.J.M. (author), Venstra, W.J. (author), Van der Zant, H.S.J. (author)The effective Young’s modulus of silicon nitride cantilevers is determined for thicknesses in the range of 20–684 nm by measuring resonance frequencies from thermal noise spectra. A significant deviation from the bulk value is observed for cantilevers thinner than 150 nm. To explain the observations we have compared the thickness dependence of...journal article 2009
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Gao, B. (author), Osorio, E.A. (author), Babaei Gaven, K. (author), Van der Zant, H.S.J. (author)We have fabricated nanometer-spaced electrodes on electron-transparent silicon nitride membranes. A thin Cr/Au layer is evaporated on the backside of the membrane which serves as a gate electrode. Using these devices, we have performed three-terminal electron transport measurements on gold nano-particles at liquid helium temperature. Coulomb...journal article 2009
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Ventra, W.J. (author), Westra, H.J.R. (author), Babaei Gavan, K. (author), Van der Zant, H.S.J. (author)We demonstrate magnetomotive drive and detection of doubly clamped string resonators in water. A compact 1.9 T permanent magnet is used to detect the fundamental and higher flexural modes of 200??m long resonators. Good agreement is found between the magnetomotive measurements and optical measurements performed on the same resonator. The...journal article 2009
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Seldenthuis, J.S. (author), Van der Zant, H.S.J. (author), Ratner, M.A. (author), Thijssen, J.M. (author)We have combined ab initio quantum chemistry calculations with a rate-equation formalism to analyze electroluminescence spectra in single-molecule junctions, measured recently by several groups in scanning tunneling microscope setups. In our method, the entire vibrational spectrum is taken into account. Our method leads to good quantitative...journal article 2010
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Martin, C.A. (author), Van Ruitenbeek, J.M. (author), Van der Zant, H.S.J. (author)We introduce a new device architecture for the independent mechanical and electrostatic tuning of nanoscale charge transport. In contrast to previous gated mechanical break junctions with suspended source–drain electrodes, the devices presented here prevent an electromechanical tuning of the electrode gap by the gate. This significant...journal article 2010
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Jhang, S.H. (author), Marganska, M. (author), Skourski, Y. (author), Preusche, D. (author), Witkamp, B. (author), Grifoni, M. (author), Van der Zant, H. (author), Wosnitza, J. (author), Strunk, C. (author)The magnetoconductance of an open carbon nanotube (CNT)-quantum wire was measured in pulsed magnetic fields. At low temperatures, we find a peculiar split magnetoconductance peak close to the chargeneutrality point. Our analysis of the data reveals that this splitting is intimately connected to the spin-orbit interaction and the tube chirality....journal article 2010