Charging phenomena in PEEM imaging and spectroscopy

Gilbert, Benjamin; Andres, Roger Y.; Perfetti, P.; Margaritondo, G.; Rempfer, Gertrude F.; Stasió, Gelsomina De

doi:10.1016/s0304-3991(99)00196-5

Cited by 57 publications

(39 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…figure 1(c)). The tribofilms, composed of polyphosphate glasses, are non-conducting, and thus are subject to charging and suppression of secondary electron emission [57]. Furthermore, shadowing also creates artifacts, which also contributes to certain regions of the image appearing darker [37].…”

Section: Physical Interpretation Of Wear Mechanismsmentioning

confidence: 98%

Chemical characterization and nanomechanical properties of antiwear films fabricated from ZDDP on a near hypereutectic Al–Si alloy

et al. 2005

View full text Add to dashboard Cite

X-ray absorption near edge structure (XANES) spectroscopy was used to monitor the products formed during the breakdown of the engine additive ZDDP during its action as a protective tribochemical agent. This investigation examines the film formed under various physical conditions on a near hypereutectic Al-Si alloy. For the first time, tribochemical films (tribofilms) formed on a high silicon weight content alloy, with virtually no ferrous component have been studied. Phosphorus K-and L-edge spectroscopies show that under typical engine operating conditions, the tribofilms have similar chemical composition over a range of different test conditions. X-ray photoelectron emission microscopy (X-PEEM) reveals that the polyphosphate glasses formed vary in chain length within localized regions. The mechanical properties of the substrate and the tribofilms were acquired using a Triboscope Ò from Hysitron Inc. The elastic moduli can be extracted from the indentation curves and show that the tribofilms' mechanical properties are similar to those of the tribofilms which form on steel under similar conditions.

show abstract

Section: Physical Interpretation Of Wear Mechanismsmentioning

confidence: 98%

Chemical characterization and nanomechanical properties of antiwear films fabricated from ZDDP on a near hypereutectic Al–Si alloy

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The differential-thickness resulting from two rounds of Pt coating makes it possible to perform photoemission experiments on shells, minerals, rocks, or any other insulators, and was introduced by our group DeVol et al, 2014). It also prevents any charging phenomena or artifacts (Gilbert et al, 2000). Figure S7e shows a polished, trimmed, and coated sample, ready for PEEM analysis.…”

Section: Sample Preparationmentioning

confidence: 99%

Nacre tablet thickness records formation temperature in modern and fossil shells

Gilbert

Bergmann

Myers

et al. 2017

Earth and Planetary Science Letters

View full text Add to dashboard Cite

“…Thus, we estimate that the interaction between two pulses, when separated in time, is strongest near the sample. In a simple model considering the first stage of the PEEM and the sample described as a cathode/anode lens [50,51], the observed effect can be understood as a result of the field from the photoelectrons released by the XUV pulse effectively spreading out the photoelectrons from the IR pulse as indicated in Figure 10.18, acting as an additional electrostatic element in the system. As is also observed, this effect would exist no matter which pulse comes first as the photoelectron bunches would affect each other while moving through the lens system.…”

Section: Experimental Setup and Requirementsmentioning

confidence: 99%

Imaging Localized Surface Plasmons by Femtosecond to Attosecond Time‐Resolved Photoelectron Emission Microscopy – “ATTO‐PEEM”

Chew

Pearce

Scheffold

et al. 2014

Attosecond Nanophysics

View full text Add to dashboard Cite

The direct detection of the spatiotemporal dynamics of nanolocalized optical near-fields on nanostructured metal surfaces, for example, imaging of localized surface plasmons (cf. Chapter 1) on rough or nanostructured metal films or the imaging of propagating surface plasmon polaritons at a vacuum-metal or metal-dielectric interface is a prerequisite to further control and optimize surface-plasmon based ultrafast nanooptics for future device development and applications [1][2][3][4].While free electrons in metals collectively respond to excitation from a light pulse, which is resonant to the surface plasmon frequency of the system, and squeeze and amplify the field intensity of the incoming plane light field into a subwavelength spatial volume, the typically broad frequency bandwidth of surface plasmon resonances supports an ultrafast response of these fields with rapid field changes on sub-femtosecond time scales [5].The sub-wavelength nanoscaled localization of optical fields in the vicinity of metal nanostructures and the ultrafast temporal evolution of such fields on a 0.1-100 fs time scale require the invention and development of new experimental methodologies, which combine nanometer (sub-optical) spatial resolution, sub-femtosecond temporal resolution, and optionally further nanospectroscopic information.Resolving the spatial distribution of such fields requires a microscopic technique with sub-optical spatial resolution, for example, in the 10-100 nm range. Scanning near-field optical microscopy (SNOM) techniques have been successfully applied with spatial resolutions of about ∼100 nm; however, the combination with ultrashort light pulses is still very difficult. Photoemission electron microscopy (PEEM) is a technique capable of resolving the spatial emission distribution of photoelectrons with an ultimate resolution of ∼10 nm.

show abstract

Charging phenomena in PEEM imaging and spectroscopy

Cited by 57 publications

References 20 publications

Chemical characterization and nanomechanical properties of antiwear films fabricated from ZDDP on a near hypereutectic Al–Si alloy

Chemical characterization and nanomechanical properties of antiwear films fabricated from ZDDP on a near hypereutectic Al–Si alloy

Nacre tablet thickness records formation temperature in modern and fossil shells

Imaging Localized Surface Plasmons by Femtosecond to Attosecond Time‐Resolved Photoelectron Emission Microscopy – “ATTO‐PEEM”

Contact Info

Product

Resources

About