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XB-ART-44788
Curr Opin Chem Biol 2011 Oct 01;155:733-40. doi: 10.1016/j.cbpa.2011.05.016.
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Label free biochemical 2D and 3D imaging using secondary ion mass spectrometry.

Fletcher JS , Vickerman JC , Winograd N .


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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) provides a method for the detection of native and exogenous compounds in biological samples on a cellular scale. Through the development of novel ion beams the amount of molecular signal available from the sample surface has been increased. Through the introduction of polyatomic ion beams, particularly C(60), ToF-SIMS can now be used to monitor molecular signals as a function of depth as the sample is eroded thus proving the ability to generate 3D molecular images. Here we describe how this new capability has led to the development of novel instrumentation for 3D molecular imaging while also highlighting the importance of sample preparation and discuss the challenges that still need to be overcome to maximise the impact of the technique.

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References [+] :
Altelaar, Direct molecular imaging of Lymnaea stagnalis nervous tissue at subcellular spatial resolution by mass spectrometry. 2005, Pubmed