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A new technique for the fabrication of highly sensitive qPlus sensor for atomic force microscopy (AFM) is described. Focused ion beam was used to cut then weld onto a bare quartz tuning fork a sharp micro-tip from an electrochemically…

Mesoscale and Nanoscale Physics · Physics 2015-07-21 Hatem Labidi , Martin Kupsta , Taleana Huff , Mark Salomons , Douglas Vick , Marco Taucer , Jason Pitters , Robert A. Wolkow

For a successful point-contact spectroscopy (PCS) measurement, metallic tips of proper shape and smoothness are essential to ensure the ballistic nature of a point-contact junction. Until recently, the fabrication of Au tips suitable for…

Instrumentation and Detectors · Physics 2015-05-04 S. Narasiwodeyar , M. Dwyer , M. Liu , W. K. Park , L. H. Greene

Quartz tuning fork-based atomic force microscopy (QTF-AFM) has become a powerful tool for high-resolution imaging of both conductive and insulating samples, including semiconductor structures and metal-coated surfaces as well as soft matter…

Mesoscale and Nanoscale Physics · Physics 2026-01-26 Hankyul Koh , Joon-Hyuk Ko , Wonho Jhe

To obtain maximal resolution in STM and AFM, the size of the protruding tip orbital has to be minimized. Beryllium as tip material is a promising candidate for enhanced resolution because a beryllium atom has just four electrons, leading to…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 Thomas Hofmann , Joachim Welker , Franz J. Giessibl

We report on the fabrication and performance of a new kind of tip for scanning tunneling microscopy. By fully incorporating a metallic tip on a silicon chip using modern micromachining and nanofabrication techniques, we realize so-called…

With recent advances in dynamic scanning probe microscopy techniques, it is now a routine to image the sub-molecular structure of molecules with atomically-engineered tips which are prepared via controlled modification of the tip…

Applied Physics · Physics 2019-03-06 Omur E. Dagdeviren

An atomic force microscope~(AFM) tip, with a few nm-thick noble metal coating, gives rise to strong electric-field at the near-field of tip apex, i.e. hot spot, when illuminated with a beam of light linearly polarized in the axial…

Mesoscale and Nanoscale Physics · Physics 2019-12-10 Ramazan Sahin , Mehmet Gunay , Alpan Bek , Mehmet Emre Tasgin

We report a reproducible technique for the fabrication of sharp superconducting Nb tips for scanning tunneling microscopy (STM) and scanning tunneling spectroscopy. Sections of Nb wire with 250 $\mu$m diameter are dry etched in an SF$_6$…

Mesoscale and Nanoscale Physics · Physics 2015-06-19 A. Roychowdhury , R. Dana , M. Dreyer , J. R. Anderson , C. J. Lobb , F. C. Wellstood

We investigate the modification of photoluminescence (PL) from single semiconductor nanocrystal quantum dots (NCs) in proximity of metal and semiconducting Atomic Force Microscope (AFM) tips. The presence of the tip alters the radiative…

Chemical Physics · Physics 2016-09-28 Yuval Ebenstein , Eyal Yoskovitz , Ronny Costi , Asaf Aharoni , Uri Banin

We demonstrate the fabrication of sharp nanopillars of high aspect ratio onto specialized atomic force microscopy (AFM) microcantilevers and their use for high-speed AFM of DNA and nucleoproteins in liquid. The fabrication technique uses…

Biomolecules · Quantitative Biology 2023-11-07 Frances I. Allen , José María De Teresa , Bibiana Onoa

Hard point-contact spectroscopy and scanning probe microscopy/spectroscopy are powerful techniques for investigating materials with strong expandability. To support these studies, tips with various physical and chemical properties are…

Materials Science · Physics 2021-02-01 Jiawei Zhang , Pinyuan Wang , Xuao Zhang , Haoran Ji , Jiawei Luo , He Wang , Jian Wang

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

Atomic-resolution imaging on molten metal/solid interfaces at temperatures above 200 {\deg}C was achieved using a high-temperature, high-speed atomic force microscope (AFM) equipped with a qPlus sensor. A tip-scanning high-speed Quadpod…

Instrumentation and Detectors · Physics 2026-04-08 Yuto Nishiwaki , Toru Utsunomiya , Takashi Ichii

A reproducible procedure for creating STM tips with nanometrically defined apices out of 0.25mm iron wire is presented.

Mesoscale and Nanoscale Physics · Physics 2024-11-15 Jędrzej Tepper , Jan M. van Ruitenbeek

We developed THz-resonant scanning probe tips, yielding strongly enhanced and nanoscale confined THz near fields at their tip apex. The tips with length in the order of the THz wavelength ({\lambda} = 96.5 {\mu}m) were fabricated by focused…

We demonstrate a new focused ion beam sample preparation method for atom probe tomography. The key aspect of the new method is that we use a neon ion beam for the final tip-shaping after conventional annulus milling using gallium ions. This…

The Field Ion Microscope (FIM) can be used to characterize the atomic configuration of the apex of sharp tips. These tips are well suited for Scanning Probe Microscopy (SPM) since they predetermine SPM resolution and electronic structure…

Mesoscale and Nanoscale Physics · Physics 2012-08-07 William Paul , Yoichi Miyahara , Peter Grütter

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

AFM-based technique of nanolithography is proposed. The method enables rapid point by point indentation with a sharp tip. When used in tandem with single-crystal diamond tips, this technique allows the creation of high aspect ratio grooves…

Mesoscale and Nanoscale Physics · Physics 2013-12-04 Alexei Temiryazev

Reduction of the inter-probe distance in multi-probe and double-tip STM down to the nanometer scale has been a longstanding and technically difficult challenge. Recent multi-probe systems have allowed for significant progress by achieving…

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