1. The Ultrafast electron Imaging Laboratory (UeIL), Department of Chemistry and Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave. W, N2L 3G1, Waterloo, Ontario, Canada
2. The Canadian Centre for Electron Microscopy, McMaster University, A.N. Bourns Science Building, 1280 Main St. W, L8S 4M1, Hamilton, Ontario, Canada
3. Department of Chemistry and Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave. W, N2L 3G1, Waterloo, Ontario, Canada