Discipline: Chemistry and Chemical Sciences
Subcategory: Materials Science
Lauren Stanton - The Pennsylvania State University
Co-Author(s): Saiphaneendra Bachu, The Pennsylvania State University, University Park, PA; Nasim Alem, The Pennsylvania State University, University Park, PA
The growth of MoS2 via low pressure powder vapor deposition (PVD) was studied to observe the effects that synthesis parameters have on MoS2 nucleation and growth behavior. The focus of this study was to increase grain size of MoS2 by reducing the amount of nucleation sites. Raman spectroscopy confirmed the presence of thin MoS2 layers on the samples, and optical microscopy (OM), coupled with scanning electron microscopy (SEM), provided quantitative measurements of grain size. Optimizing synthesis conditions, including a substrate change from Si/SiO2 to sapphire, led to the growth of micron-scale triangles. Knowledge of the parameter effects on nucleation of MoS2 will provide guidance for creating more complex systems, such as doping MoS2 or experimenting with 2-D alloys.
Funder Acknowledgement(s): We would like to thank the National Science Foundation EFRI REM (EFMA-1433378) for funding this research project.
Faculty Advisor: Nasim Alem, email@example.com
Role: The research I did included growing the MoS2 samples and using characterization to analyze the results.