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Single molecular rotor is an important component for constructing bot-tom-up molecular mechanical machines and a window for shedding light on complex physical and chemical questions about motions of organic molecules on surfaces. Stability…

Mesoscale and Nanoscale Physics · Physics 2022-04-05 Kwan Ho Au Yeung , Tim Kühne , Frank Eisenhut , Francesca Moresco

We present an improved way for imaging the local density of states with a scanning tunneling microscope, which consists in mapping the surface topography while keeping the differential conductance (d$I$/d$V$) constant. When archetypical…

Mesoscale and Nanoscale Physics · Physics 2017-12-12 Gaël Reecht , Benjamin Heinrich , Hervé Bulou , Fabrice Scheurer , Laurent Limot , Guillaume Schull

Scanning tunneling microscopy using a CO-functionalized tip is combined with simulations to explore the impact of the CO tilt angle on topographies of a single Cu atom and CO molecule adsorbed on Cu(111). Images of the Cu atom acquired with…

Materials Science · Physics 2024-09-24 Ivan Abilio , Nicolas Néel , Jörg Kröger , Krisztián Palotás

A universal challenge facing the development of electrochemical materials is our lack of understanding of physical and chemical processes at local length scales in 10-100 nm regime, and acquiring this understanding requires a new generation…

Mesoscale and Nanoscale Physics · Physics 2017-10-31 Ehsan Nasr Esfahani , Ahmad Eshghinejad , Yun Ou , Jinjin Zhao , Stuart Adler , Jiangyu Li

A simple, reliable method for preparation of bulk Cr tips for Scanning Tunneling Microscopy (STM) is proposed and its potentialities in performing high-quality and high-resolution STM and Spin Polarized-STM (SP-STM) are investigated. Cr…

Scanning transmission electron microscopy (STEM) has become the technique of choice for quantitative characterization of atomic structure of materials, where the minute displacements of atomic columns from high-symmetry positions can be…

Materials Science · Physics 2021-10-05 Kevin M. Roccapriore , Nicole Creange , Maxim Ziatdinov , Sergei V. Kalinin

The electrostatic behavior of a prototypical three-dimensional topological insulator Bi$_2$Se$_3$(111) is investigated by a scanning tunneling microscopy (STM) study of the distribution of Rb atoms adsorbed on the surface. The positively…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 P. Löptien , L. Zhou , J. Wiebe , A. A. Khajetoorians , J. L. Mi , B. B. Iversen , Ph. Hofmann , R. Wiesendanger

Crystallographic image processing (CIP) techniques may be utilized in scanning probe microscopy (SPM) to glean information that has been obscured by signals from multiple probe tips. This may be of particular importance for scanning…

Materials Science · Physics 2020-07-07 Jack C. Straton , Peter Moeck , Bill Moon , Taylor T. Bilyeu

In conventional optical Stark-shift spectroscopy, molecules are exposed to spatially homogeneous static electric fields that shift the energies of their spectral lines. These shifts are attributed to the molecular electronic properties,…

A custom double-lamella method is presented for electrochemically etching tungsten wire for use as tips in scanning tunneling microscopy (STM). For comparison, tips were also manufactured in-house using numerous conventional methods and…

Mesoscale and Nanoscale Physics · Physics 2015-02-06 J. K. Schoelz , P. Xu , S. D. Barber , D. Qi , M. L. Ackerman , G. Basnet , C. T. Cook , P. M. Thibado

Recent work shows that inelastic electron scanning tunneling microscope (STM) probes the elementary spin excitations of a single and a few magnetic atoms in a thin insulating layer. Here I show that this new type of spectroscopy is…

Mesoscale and Nanoscale Physics · Physics 2009-12-10 J. Fernandez-Rossier

Scanning probe microscopy (SPM) is traditionally based on very sharp tips, where the small size of the apex is critical for resolution. This paradigm is about to shift, since a novel generation of planar probes (color centers in diamond,…

Instrumentation and Detectors · Physics 2021-06-24 Stefan Ernst , Dominik M. Irber , Andreas M. Waeber , Georg Braunbeck , Friedemann Reinhard

We investigate theoretically how single-molecule spectroscopy techniques can be used to perform fast and high resolution displacement detection and manipulation of nanomechanical oscillators, such as singly clamped carbon nanotubes. We…

Mesoscale and Nanoscale Physics · Physics 2015-10-21 Vadim Puller , Brahim Lounis , Fabio Pistolesi

Metasurfaces are an emerging platform for manipulating light on a two-dimensional plane. Existing metasurfaces comprise arrays of optical resonators such as plasmonic antennas or high-index nanorods. In this letter, we describe a new…

Optics · Physics 2017-08-30 Ming Zhou , Jingfeng Liu , Mikhail Kats , Zongfu Yu

The junction of a scanning tunneling microscope (STM) operating in the tunneling regime was irradiated with femtosecond laser pulses. A photo-excited hot electron in the STM tip resonantly tunnels into an excited state of a single molecule…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 Shiwei Wu , Wilson Ho

Scanning tunneling microscopy (STM) is a fundamental tool for determination of the surface atomic structure. However, the interpretation of high resolution microscopy images is not straightforward. In this paper we provide a physical…

Materials Science · Physics 2019-07-23 Ruslan Zhachuk , Jose Coutinho

We propose cotunneling as the microscopic mechanism that makes possible inelastic electron spectroscopy of magnetic atoms in surfaces for a wide range of systems, including single magnetic adatoms, molecules and molecular stacks. We…

Mesoscale and Nanoscale Physics · Physics 2011-08-26 F. Delgado , J. Fernández-Rossier

We describe an all-optical lithography process that can be used to make electrical contact to atomic-precision donor devices made in silicon using scanning tunneling microscopy (STM). This is accomplished by implementing a cleaning…

Scattering scanning near-field optical microscopy (s-SNOM) is a powerful technique for mid-infrared spectroscopy at nanometer length scales. By investigating objects in aqueous environments through ultrathin membranes, s-SNOM has recently…

We explore theoretically the scanning tunneling microscopy of single molecules on substrates using a framework of two local probes. This framework is appropriate for studying electron flow in tip/molecule/substrate systems where a thin…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 John Buker , George Kirczenow