November 7, 2019
This technical seminar on Atom Probe Tomography for 3D Atomic-Scale Characterization will be hosted by CAMECA Instruments. Atom Probe Tomography (APT) is the highest special resolution analytical characterization technique with high efficiency single atom detection for quantitative atom scale 3D compositional analysis and elemental mapping of chemical heterogeneities. This talk will cover APT operational theory, an introduction to sample prep and data reconstruction, and an overview of various applications. A commercial cryo-UHV solution for FIB-APT specimen transfer will also be presented which expands the application space for APT to biological materials, hydrogen containing materials, and surfaces prone to rapid oxidation.
Lunch will be provided
August 9, 2019
3D Imaging Methods and Quantitative Analysis for Advanced Material Science
Come grab a bowl of Howling Cow Ice Cream and join us for a talk in the AIF Seminar Series. Dr. Roland Brunner, group leader at the Materials Center Leoben, Forschung GmbH (MCL), will present 3D imaging methods and quantitative analysis for advanced material science. The AIF Seminar Series is designed to be informal, interactive, and fun. There will be plenty of opportunities to discuss science and network.
To learn more, visit the event website. The event is free but please RSVP here by August 5, 2019.
Come grab a bowl of Howling Cow Ice Cream and join us for the inaugural talk in the AIF Seminar Series. Dr. Josh Kacher, assistant professor in Georgia Tech’s Materials Science and Engineering department, will present advances in localized strain mapping (abstract below). The AIF Seminar Series is designed to be informal, interactive, and fun. There will be plenty of opportunities to discuss science and network.
Please RSVP here by July 28, 2017.
“Diffraction-Based Multimodal Image Acquisition and Strain Mapping in the Electron Microscope”
Advances in electron detector technology, including the advent of direct-electron detectors, and increases in computational processing capacity have transformed electron microscopy-based characterization into a big-data analytics tool capable of multimodal image acquisition and high-resolution property mapping. This includes the ability to post-experiment select desired imaging conditions and map out the three-dimensional elastic strain tensor, crystal rotations, and dislocation density at length scales ranging from nanometers to hundreds of microns. Increases in electron detection efficiency available from direct-electron detectors also allows multimodal image acquisition to be coupled with in situ electron microscopy experiments such as heating, straining, and exposure to aggressive environments. Central to these advances is the development and application of scanning nanobeam diffraction techniques in both scanning and transmission electron microscopy. This talk will review recent advances in multimodal image acquisition and property mapping with a focus on two materials applications: relating microstructure to strain localization in metal alloys and characterizing strain gradients in compositionally graded ferroelectric thin films.
Want to know more about the Kacher Lab. Visit the lab website.
The Research Triangle Nanotechnology Network is excited to announce an upcoming seminar by Professor Antonio Martínez-Collazo. Professor Martínez joins us from the Physics Department at the University of Puerto Rico. He will present his work using materials characterization techniques to study works of art and archaeological artifacts. Following the talk, the Analytical Instrumentation Facility (AIF) at NC State will host tours for interested attendees to learn more about available characterization techniques and instrumentation.
Click here to register for a tour. Questions can be directed to email@example.com.
Parking information: There are Centennial Campus pay-by-space parking spots available in the Poulton Deck and Partners Way Deck. More information about parking at NC State can be found here.
In recent years, materials science characterization techniques have been increasingly applied in the study of works of art and archaeological artifacts. These studies have been geared to inform the efforts of art historians and conservators in order to obtain a better understanding of the degradation processes that occur in art pieces, to establish the palette and practices of particular artists, and to aid in forensic efforts to identify forgeries and fakes. In archaeology, materials characterization techniques have been used in the interrogation of archaeological artifacts in order to derive information about the individuals who originally fabricated them and their communities. This talk will report on two such applications.
First, we will consider a study involving image acquisition techniques and x-ray fluorescence spectroscopy to a painting by José Campeche y Rivafrecha, one of the first and most important Puerto Rican painters of the18th century. The oil-over-wood- panel painting, known as “La Virgen de Belén” or Bethlehem’s Madonna, portrays a nursing Madonna and child scene. Campeche executed a large number of paintings with very similar compositions, i.e showing the female figure nursing a child with her breast exposed with the unique exception of the painting studied in this work. Puerto Rican art historians have speculated that this was a result of a posterior intervention. Grazing angle visible images, as well as, infrared reflectography taken with Si- (940 nm) and InGaAs- (< 1.7 μm) based cameras and x-ray images of the painting were obtained in order to establish this possibility. Images in the visible taken at a low grazing angle established the presence a paint overlayer in the suspect area. Reflectance infrared images and transmission x-ray images confirmed their presence. X-ray fluorescence analysis was performed in the intervened area and in similar chromatic fields elsewhere in the painting. The obtained spectra indicate that the pigments used in the intervened area are the same as those used elsewhere in the painting.
Second, we will report on the application of Raman and X-ray fluorescence spectroscopy to the identification of pigments in pre-Columbian (250 A.C. – 600 D.C.) Caribbean ceramics. The results shed light on a controversy among Caribbean archaeologists: one group argues that the pieces were produced by two different aborigine cultures (Huecoide and Saladoide) versus those who propose that they belong the same culture. Our results, particularly those derived from the study of white pigments in decorated ceramic sherds, supports the two-different-culture hypothesis as two distinct pigments is suggested: kaolinite and calcium carbonate.
We are excited to announce an upcoming seminar by Professor Antonio Martínez-Collazo. Professor Martínez will discuss his work using materials characterization techniques to study works of art and archaeological artifacts. Following the talk, the Analytical Instrumentation Facility (AIF) at NC State will host tours for interested attendees to learn more about available characterization techniques and instrumentation.
More information can be found on the event website.