Paper: High-Throughput Optical Thickness and Size Characterization of 2D Materials
We describe a method using simple optical microscopy and image processing that simultaneously characterizes thousands of nanosheets in a sample area on the order of 1 mm2. Including data acquisition and processing, both the number of atomic layers and the lateral sizes of all sheets can be obtained within a few hours—approximately 100 times faster than with previous methods, such as atomic force microscopy. We demonstrate the utility of this method by examining fractions made from a sample of graphene oxide (GO) made using an emulsion-based method. Beyond providing the morphological composition of the samples, the reported method is sensitive enough to provide information about the oxidation level of a population of GO sheets and, correspondingly, optical constants of the material.
|W. W. Dickinson, H. V. Kumar, D. H. Adamson, H. C. Schniepp*
“High-Throughput Optical Thickness and Size Characterization of 2D Materials”
Nanoscale X, XXX-XXX (2018)
|Publisher's Web Page:||http://pubs.rsc.org/en/content/articlelanding/2018/nr/c8nr01725e|