1
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Cumpson PJ, Jaskiewicz M, Kim WK. Argon cluster‐ion sputter yield: Molecular dynamics simulations on silicon and equation for estimating total sputter yield. SURF INTERFACE ANAL 2021. [DOI: 10.1002/sia.6996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Peter J. Cumpson
- NEXUS laboratory, School of Engineering Newcastle University Newcastle upon Tyne UK
- Now at Mark Wainwright Analytical Centre University of New South Wales Sydney New South Wales Australia
| | - Mieszko Jaskiewicz
- NEXUS laboratory, School of Engineering Newcastle University Newcastle upon Tyne UK
| | - Woo Kyun Kim
- Department of Mechanical and Materials Engineering University of Cincinnati Cincinnati Ohio USA
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2
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Sheriff J, Fletcher IW, Cumpson PJ. Computer-readable Image Markers for Automated Registration in Correlative Microscopy - "autoCRIM". Ultramicroscopy 2021; 228:113322. [PMID: 34098347 DOI: 10.1016/j.ultramic.2021.113322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 03/24/2021] [Accepted: 05/18/2021] [Indexed: 11/28/2022]
Abstract
We present a newly developed methodology using computer-readable fiducial markers to allow images from multiple imaging modalities to be registered automatically. This methodology makes it possible to correlate images from many surface imaging techniques to provide an unprecedented level of surface detail on a nanometre scale that no one technique can provide alone. This methodology provides the capability to navigate to specific areas of interest when transferring samples from machine to machine seamlessly. Then taking data acquired from scanning electron microscope (SEM), secondary ion mass spectrometry (SIMS), x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and optical inspection tools and combining all the data acquired to then generate a 3D data representative model of a surface.
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Affiliation(s)
- J Sheriff
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
| | - I W Fletcher
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - P J Cumpson
- Mark Wainwright Analytical Centre, UNSW, Sydney NSW 2052, Australia
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3
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Neagu D, Papaioannou EI, Ramli WKW, Miller DN, Murdoch BJ, Ménard H, Umar A, Barlow AJ, Cumpson PJ, Irvine JTS, Metcalfe IS. Demonstration of chemistry at a point through restructuring and catalytic activation at anchored nanoparticles. Nat Commun 2017; 8:1855. [PMID: 29187751 PMCID: PMC5707356 DOI: 10.1038/s41467-017-01880-y] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/23/2017] [Indexed: 11/12/2022] Open
Abstract
Metal nanoparticles prepared by exsolution at the surface of perovskite oxides have been recently shown to enable new dimensions in catalysis and energy conversion and storage technologies owing to their socketed, well-anchored structure. Here we show that contrary to general belief, exsolved particles do not necessarily re-dissolve back into the underlying perovskite upon oxidation. Instead, they may remain pinned to their initial locations, allowing one to subject them to further chemical transformations to alter their composition, structure and functionality dramatically, while preserving their initial spatial arrangement. We refer to this concept as chemistry at a point and illustrate it by tracking individual nanoparticles throughout various chemical transformations. We demonstrate its remarkable practical utility by preparing a nanostructured earth abundant metal catalyst which rivals platinum on a weight basis over hundreds of hours of operation. Our concept enables the design of compositionally diverse confined oxide particles with superior stability and catalytic reactivity. Metal nanoparticles prepared by exsolution at the surface of perovskite oxides are key species in catalysis and energy fields. Here, the authors develop a chemistry at a point concept by tracking individual nanoparticles with excellent activity and stability throughout various chemical transformations.
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Affiliation(s)
- Dragos Neagu
- School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
| | | | - Wan K W Ramli
- School of Engineering, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, UK.,School of Bioprocess Engineering, University Malaysia Perlis, 02600, Perlis, Malaysia
| | - David N Miller
- School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Billy J Murdoch
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Ahmed Umar
- School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Anders J Barlow
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Peter J Cumpson
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - John T S Irvine
- School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
| | - Ian S Metcalfe
- School of Engineering, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, UK.
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4
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Affiliation(s)
- Sabrina Tardio
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne Tyne and Wear NE1 7RU UK
| | - Peter J. Cumpson
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne Tyne and Wear NE1 7RU UK
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Weston JO, Miyamura H, Yasukawa T, Sutarma D, Baker CA, Singh PK, Bravo-Sanchez M, Sano N, Cumpson PJ, Ryabenkova Y, Kobayashi S, Conte M. Water as a catalytic switch in the oxidation of aryl alcohols by polymer incarcerated rhodium nanoparticles. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01006k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh nanoparticles that were inactive in toluene, were converted into a powerful catalyst for aryl alcohol oxidation by the presence of water in the reaction media.
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Cumpson PJ, Fletcher IW, Burnett R, Sano N, Barlow AJ, Portoles JF, Li LW, Kiang ASH. Multispectral optical imaging combined in situwith XPS or ToFSIMS and principal component analysis. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Peter J. Cumpson
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Ian W. Fletcher
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Richard Burnett
- School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Naoko Sano
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Anders J. Barlow
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Jose F. Portoles
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Lisa W. Li
- School of Computer Science; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Andrew Shih-Hsiung Kiang
- School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
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Barlow AJ, Portoles JF, Sano N, Cumpson PJ. Removing Beam Current Artifacts in Helium Ion Microscopy: A Comparison of Image Processing Techniques. Microsc Microanal 2016; 22:939-947. [PMID: 27619633 DOI: 10.1017/s1431927616011673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The development of the helium ion microscope (HIM) enables the imaging of both hard, inorganic materials and soft, organic or biological materials. Advantages include outstanding topographical contrast, superior resolution down to <0.5 nm at high magnification, high depth of field, and no need for conductive coatings. The instrument relies on helium atom adsorption and ionization at a cryogenically cooled tip that is atomically sharp. Under ideal conditions this arrangement provides a beam of ions that is stable for days to weeks, with beam currents in the order of picoamperes. Over time, however, this stability is lost as gaseous contamination builds up in the source region, leading to adsorbed atoms of species other than helium, which ultimately results in beam current fluctuations. This manifests itself as horizontal stripe artifacts in HIM images. We investigate post-processing methods to remove these artifacts from HIM images, such as median filtering, Gaussian blurring, fast Fourier transforms, and principal component analysis. We arrive at a simple method for completely removing beam current fluctuation effects from HIM images while maintaining the full integrity of the information within the image.
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Affiliation(s)
- Anders J Barlow
- National EPSRC XPS Users' Service (NEXUS),School of Mechanical and Systems Engineering,Newcastle University,Newcastle upon Tyne,Tyne and Wear,NE1 7RU,UK
| | - Jose F Portoles
- National EPSRC XPS Users' Service (NEXUS),School of Mechanical and Systems Engineering,Newcastle University,Newcastle upon Tyne,Tyne and Wear,NE1 7RU,UK
| | - Naoko Sano
- National EPSRC XPS Users' Service (NEXUS),School of Mechanical and Systems Engineering,Newcastle University,Newcastle upon Tyne,Tyne and Wear,NE1 7RU,UK
| | - Peter J Cumpson
- National EPSRC XPS Users' Service (NEXUS),School of Mechanical and Systems Engineering,Newcastle University,Newcastle upon Tyne,Tyne and Wear,NE1 7RU,UK
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Cumpson PJ, Fletcher IW, Sano N, Barlow AJ. Rapid multivariate analysis of 3D ToF-SIMS data: graphical processor units (GPUs) and low-discrepancy subsampling for large-scale principal component analysis. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Peter J Cumpson
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Ian W Fletcher
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Naoko Sano
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Anders J Barlow
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
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Sano N, Barlow AJ, Tsakonas C, Cranton W, Cumpson PJ. Optimal conditions for gas cluster ion beams in studying inorganic interface species: improved chemical information at a ZnO interface. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.5949] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Naoko Sano
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Anders J. Barlow
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Costas Tsakonas
- College of Arts and Science, School of Science & Technology; Nottingham Trent University; Burton Street Nottingham NG1 4BU UK
| | - Wayne Cranton
- Faculty of Arts, Computing, Engineering and Sciences; Sheffield Hallam University; Howard Street Sheffield S1 1WB UK
| | - Peter J. Cumpson
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
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Cumpson PJ, Sano N, Fletcher IW, Portoles JF, Bravo-Sanchez M, Barlow AJ. Multivariate analysis of extremely large ToFSIMS imaging datasets by a rapid PCA method. SURF INTERFACE ANAL 2015. [DOI: 10.1002/sia.5800] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Peter J. Cumpson
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Naoko Sano
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Ian W. Fletcher
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Jose F. Portoles
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Mariela Bravo-Sanchez
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
| | - Anders J. Barlow
- National EPSRC XPS User's Service (NEXUS) Laboratory, School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU United Kingdom
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Barlow AJ, Scott O, Sano N, Cumpson PJ. Multivariate Auger Feature Imaging (MAFI) - a new approach towards chemical state identification of novel carbons in XPS imaging. SURF INTERFACE ANAL 2015. [DOI: 10.1002/sia.5738] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Anders J. Barlow
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU Tyne and Wear UK
| | - Oliver Scott
- School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU Tyne and Wear UK
| | - Naoko Sano
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU Tyne and Wear UK
| | - Peter J. Cumpson
- National EPSRC XPS Users' Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU Tyne and Wear UK
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Cumpson PJ. Recent Developments in the Study of the Surface-Stability of Platinum and Platinum-Iridium Mass Standards. johnson matthey technol rev 2014. [DOI: 10.1595/147106714x684551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Sano N, Cumpson PJ, Cwiertnia E, Perry JJ, Singer BW. Multivariate analysis studies of the ageing effect for artist's oil paints containing modern organic pigments. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Naoko Sano
- Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Peter J. Cumpson
- Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Elke Cwiertnia
- Chemical and Forensic Sciences; Northumbria University; Newcastle upon Tyne NE1 8ST UK
| | - Justin J. Perry
- Chemical and Forensic Sciences; Northumbria University; Newcastle upon Tyne NE1 8ST UK
| | - Brian W. Singer
- Chemical and Forensic Sciences; Northumbria University; Newcastle upon Tyne NE1 8ST UK
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Cumpson PJ, Portoles JF, Barlow AJ, Sano N, Birch M. Depth profiling organic/inorganic interfaces by argon gas cluster ion beams: sputter yield data for biomaterials, in-vitro
diagnostic and implant applications. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5333] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Peter J. Cumpson
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Jose F. Portoles
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Anders J. Barlow
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Naoko Sano
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle upon Tyne NE1 7RU UK
| | - Mark Birch
- Musculoskeletal Research Group, Institute of Cellular Medicine, Medical School; Newcastle University; Newcastle upon Tyne NE2 4HH UK
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Abstract
The invention of the atomic force microscope led directly to the possibility of carrying out nanomechanical tests with forces below the nanonewton and the ability to test nanomaterials and single molecules. As a result there is a pressing need for accurate and traceable force calibration of AFM measurements that is not satisfactorily met by existing calibration methods. Here we present a force reference device that makes it possible to calibrate the normal stiffness of typical AFM microcantilevers down to 90 pN nm(-1) with very high accuracy and repeatability and describe how it can be calibrated traceably to the International System of Units via the ampere and the metre, avoiding in that way the difficulties associated with traceability to the SI kilogram. We estimate the total uncertainty associated with cantilever calibration including traceability to be better than 3.5%, thus still offering room for future improvement.
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Affiliation(s)
- Jose F Portoles
- Advanced Metrology Laboratory (AML) and School of Mechanical and Systems Engineering, Newcastle University, NE17RU, Newcastle-Upon-Tyne, UK.
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Cumpson PJ, Portoles JF, Sano N. Observations on X-ray enhanced sputter rates in argon cluster ion sputter depth profiling of polymers. SURF INTERFACE ANAL 2012. [DOI: 10.1002/sia.5198] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Peter J. Cumpson
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle-upon-Tyne; NE1 7RU; United Kingdom
| | - Jose F. Portoles
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle-upon-Tyne; NE1 7RU; United Kingdom
| | - Naoko Sano
- National EPSRC XPS User's Service (NEXUS), School of Mechanical and Systems Engineering; Newcastle University; Newcastle-upon-Tyne; NE1 7RU; United Kingdom
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Cumpson PJ, Hedley J. Accurate analytical measurements in the atomic force microscope: a microfabricated spring constant standard potentially traceable to the SI. Nanotechnology 2003; 14:1279-1288. [PMID: 21444981 DOI: 10.1088/0957-4484/14/12/009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Calibration of atomic force microscope (AFM) cantilevers is necessary for the measurement of nanonewton and piconewton forces, which are critical to analytical applications of AFM in the analysis of polymer surfaces, biological structures and organic molecules at nanoscale lateral resolution. We have developed a compact and easy-to-use reference artefact for this calibration, using a method that allows traceability to the SI (Système International). Traceability is crucial to ensure that force measurements by AFM are comparable to those made by optical tweezers and other methods. The new non-contact calibration method measures the spring constant of these artefacts, by a combination of electrical measurements and Doppler velocimetry. The device was fabricated by silicon surface micromachining. The device allows AFM cantilevers to be calibrated quite easily by the 'cantilever-on-reference' method, with our reference device having a spring constant uncertainty of around ± 5% at one standard deviation. A simple substitution of the analogue velocimeter used in this work with a digital model should reduce this uncertainty to around ± 2%. Both are significant improvements on current practice, and allow traceability to the SI for the first time at these nanonewton levels.
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Affiliation(s)
- Peter J Cumpson
- Centre for Optical and Analytical Measurement (COAM), National Physical Laboratory, Teddington TW11 0LW, UK
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18
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Lea C, Cumpson PJ. Preface. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Perruchot C, Watts JF, Lowe C, White RG, Cumpson PJ. Angle-resolved XPS characterization of urea formaldehyde-epoxy systems. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1465] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cumpson PJ. Estimation of inelastic mean free paths for polymers and other organic materials: use of quantitative structure-property relationships. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.948] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Cumpson PJ. Elastic scattering corrections in AES and XPS: I. Two rapid Monte Carlo methods for calculating the depth distribution function. SURF INTERFACE ANAL 1993. [DOI: 10.1002/sia.740200818] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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