SIMS-A precursor and partner to contemporary mass spectrometry (original) (raw)

Significant events driving the development of SIMS over the last 50 years are reviewed. The discussion includes recollections of dynamic and static SIMS from the 1970s, of the emergence of TOF-SIMS during the 1980s and of the incorporation of cluster ion bombardment during most recent times. Advances in theoretical understanding of the sputtering phenomenon and of the ionization process that accompanied these advances are also included. Many early discoveries were focused upon the stimulated desorption of organic and bioorganic molecules, first via static SIMS and next via fast atom bombardment, that were important precursor experiments to modern day mass spectrometry. Today, submicron moleculespecific imaging and molecular depth profiling represent unique aspects of SIMS experiments. Developments that led to the optimization of these modalities are also emphasized in the review. In general, the characteristics of SIMS that make it a contemporary partner to modern day mass spectrometry are highlighted. 2014 Elsevier B.V. All rights reserved.

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Instrumentation and software for mass spectrometry imaging—Making the most of what you've got

Journal of Proteomics, 2012

Whilst it might be desirable to be able to purchase an up to date mass spectrometry 19 platform and dedicate it to mass spectrometry imaging, this is not the situation initially for 20 many laboratories. There are a variety of methods by which existing mass spectrometers 21 can be upgraded/adapted to perform mass spectrometry imaging using MALDI, DESI or 22 LAESI as the means of generating ions. The focus of this article is on relatively low cost 23 adaptations of existing instrumentation with suggestions made for performance enhance-24 ments where appropriate. A brief description of attempts to perform SIMS imaging on 25 quadrupole time of flight mass spectrometers is also given. The required software is 26 described with particular emphasis on freeware packages which can be used to display/ 27 enhance data. Requirements for data pre-processing prior or statistical analysis are 28 discussed along with the use of MATLAB® for the analysis itself. This article is part of a 29 Special Issue entitled: Mass Spectrometry Imaging.

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Surface Analysis and Techniques in Biology, 2014

In principle, secondary ion mass spectrometry (SIMS) molecule-specific imaging has vast implications in biological research where submicrometer spatial resolution, uppermost surface layer sensitivity, and chemically unmodified sample preparation are essential. Yet SIMS imaging using atomic projectiles has been rather ineffective when applied to biological materials. The common pitfalls experienced during these analyses include low secondary ion yields, extensive fragmentation, restricted mass ranges, and the accumulation of significant physical and chemical damage after sample erosion beyond 1 % of the surface molecules. Collectively, these limitations considerably reduce the amount of material available for detection and result in inadequate sensitivity for most applications. In response, polyatomic (cluster) ions have been introduced as an alternate imaging projectile. Cluster ion bombardment has been observed to enhance secondary ion yields, extend the spectral mass range, and decrease the incidence of physical and chemical damage during sample erosion. The projectiles are expected to considerably increase the number of molecules available for analysis and to significantly improve the overall sensitivity. Hence, the objectives of this chapter are to describe the unique physical basis for the improvements observed during polyatomic bombardment and to identify the emerging biological applications made practical by the introduction of cluster projectiles to SIMS.

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Methods, 2012

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Reviews of Modern Physics, 2015

Mass spectrometry (MS) is widely regarded as the most sensitive and specific general purpose analytical technique. More than a century has passed for MS since the groundbreaking work of Nobel laureate Sir Joseph John Thomson in 1913. This Colloquium aims to (1) give an historical overview of the major instrumentation achievements that have driven mass spectrometry forward in the past century, including those leading up to the initial work of Thomson, (2) provide the nonspecialist with an introduction to MS, and (3) highlight some key applications of MS and explore the current and future trends. Because of the vastness of the subject area and quality of the manifold research efforts that have been undertaken over the last 100 years, which have contributed to the foundations and subsequent advances in mass spectrometry, it should be understood that not all of the key contributions may have been included in this Colloquium. Mass spectrometry has embraced a multitude of scientific disciplines and to recognize all of the achievements is an impossible task, such has been the diverse impact of this invaluable technique. Scientific progress is usually made via the cumulative effort of a large number of researchers; the achievements reported herein are only a representation of that effort.

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TrAC Trends in Analytical Chemistry, 2007

The practice of mass spectrometry is one of the methods of analytical chemistry that has undergone the greatest change during the past 25 years. There are many developments that could be highlighted in a short overview such as this. However, the present article will simply concentrate on mass analysis of non-volatiles.

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