X-ray Microscopy

Jacobsen, Chris

doi:10.1017/9781139924542

Cited by 38 publications

(40 citation statements)

References 1,319 publications

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“…Confocal XRF (CXRF) microscopy allows spatial discrimination of XRF photons from a sample in all three dimensions. 71 CXRF employs overlapping focal regions of two X-ray optics-a condenser and collector-to directly probe a 3D volume in space. Although polycapillaries are the most common collection optics used for CXRF microscopy, they limit the technique to depth resolution of 10s of microns.…”

Section: Xrf Confocal Imagingmentioning

confidence: 99%

Plasmonic nanorod probes’ journey inside plant cells for in vivo SERS sensing and multimodal imaging

Garcia

Stephen³

et al. 2023

Nanoscale

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Section: Xrf Confocal Imagingmentioning

confidence: 99%

Plasmonic nanorod probes’ journey inside plant cells for in vivo SERS sensing and multimodal imaging

Garcia

Stephen³

et al. 2023

Nanoscale

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“…Regardless of whether we wish to use them in a full-field imaging microscope, to focus a beam to a small spot for a scanning microscope or to focus a short pulse to a small spot to achieve high intensities, the short focal-length lenses of these examples would bring several practical inconveniences. The field of view would be limited to a width that is comparable to the diameter of the lens [ 3 ] and the working distance limits the size of objects that can be examined in a tomographic setting. The lens must be positioned near the source or to an image of that source, where the beam size matches the diameter of the lens, placing high demands on the beamline design and optics.…”

Section: Introductionmentioning

confidence: 99%

“…Here, we examine achromat and apochromat designs to focus short-wavelength X-rays for imaging modalities such as scanning Compton X-ray microscopy [ 15 , 16 ], scanning fluorescence microscopy [ 3 ], ptychography [ 17 ] and projection imaging [ 18 ]. The achievable exposure times of these schemes are usually limited by the available flux that can be focused in a small spot, which could be significantly increased by the ability to accept a larger bandwidth from the source (such as the full width of a harmonic of an undulator device at a modern synchrotron radiation facility).…”

Section: Introductionmentioning

confidence: 99%

High-resolution achromatic X-ray optical systems for broad-band imaging and for focusing attosecond pulses

Chapman

Bajt

2021

Proc. R. Soc. A.

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Achromatic focusing systems for hard X-rays are examined which consist of a refractive lens paired with a diffractive lens. Compared with previous analyses, we take into account the behaviour of thick refractive lenses, such as compound refractive lenses and waveguide gradient index refractive lenses, in which both the focal length and the position of the principal planes vary with wavelength. Achromatic systems formed by the combination of such a thick refractive lens with a multilayer Laue lens are found that can operate at a focusing resolution of about 3 nm, over a relative bandwidth of about 1%. With the appropriate distance between the refractive and diffractive lenses, apochromatic systems can also be found, which operate over relative bandwidth greater than 10%. These systems can be used to focus short pulses without distorting them in time by more than several attoseconds. Such systems are suitable for high-flux scanning microscopy and for creating high intensities from attosecond X-ray pulses.

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“…In this work, we focus on sample preparation mainly used in X-ray microscopy (Jacobsen, 2019), especially nano-tomography in the multi-keV energy range. Many existing techniques, such as focused ion-beam milling Young & Moore, 2005), laser microdissection (Nelson et al, 2006) as well as mechanical cutting using an ultramicrotome (Wanner et al, 2015;Dykstra, 1992), can be used to reduce the dimensions of a sample.…”

Section: Introductionmentioning

confidence: 99%

A lathe system for micrometre-sized cylindrical sample preparation at room and cryogenic temperatures

Holler

Ihli

Tsai

et al. 2020

J Synchrotron Radiat

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A simple two‐spindle based lathe system for the preparation of cylindrical samples intended for X‐ray tomography is presented. The setup can operate at room temperature as well as under cryogenic conditions, allowing the preparation of samples down to 20 and 50 µm in diameter, respectively, within minutes. Case studies are presented involving the preparation of a brittle biomineral brachiopod shell and cryogenically fixed soft brain tissue, and their examination by means of ptychographic X‐ray computed tomography reveals the preparation method to be mainly free from causing artefacts. Since this lathe system easily yields near‐cylindrical samples ideal for tomography, a usage for a wide variety of otherwise challenging specimens is anticipated, in addition to potential use as a time‐ and cost‐saving tool prior to focused ion‐beam milling. Fast sample preparation becomes especially important in relation to shorter measurement times expected in next‐generation synchrotron sources.

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X-ray Microscopy

Cited by 38 publications

References 1,319 publications

Plasmonic nanorod probes’ journey inside plant cells for in vivo SERS sensing and multimodal imaging

Plasmonic nanorod probes’ journey inside plant cells for in vivo SERS sensing and multimodal imaging

High-resolution achromatic X-ray optical systems for broad-band imaging and for focusing attosecond pulses

A lathe system for micrometre-sized cylindrical sample preparation at room and cryogenic temperatures

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