In-situ TEM Investigations of Nanomaterials

1) E-Beam and 2D Nanomaterials

Monitor the structure and spectroscopy during growth and degradation of 2D nanomaterials

Publication: R. G. Mendes et al. ACS Nano, 13, 978–995 (2019)

• E-beam-driven growth and degradation of novel 2D materials
• E-beam/matter interactions
• Correlate Dynamics, Structure and Spectroscopic analysis

Publication: R. G. Mendes et al. Small, 16, 1907115 (2020)

Acceleration Voltage and Current Influence on g-C₃N₄

• Structural changes under acceleration voltages and currents exposures
• EELS analysis to determine local chemical composition changes
• Electron sensitive samples

Publication: R. G. Mendes et al. Phys. Chem. Chem. Phys., 23, 4747-4756 (2021)

2) Controllable In-situ Graphitization

E-Beam-Driven Graphene Formation on Iron Oxide Nanoparticles

• Electron-driven graphitization of organic molecules (oleic acid) on iron oxide NPs
• Easily controllable graphene coating thickness
• Scalable and environmental friendly

Publication: R. G. Mendes et al. J. Phys. Chem. C., 116, 23749-23756 (2012)

3) E-Beam Imaging of Soft Matter (Cells)

Iron Oxide NPs Tracking, Uptake and Cytotoxicity

• Biological sample preparation for TEM studies
• Tracking of iron oxide NPs inside cells
• NPs with larger diameter and larger cluster are preferentially internalized by the cells

Publication: R. G. Mendes et al. Biochem. Biophys. Acta, 1840, 160-169 (2014)

NGO NPs Tracking, Uptake and Cytotoxicity

NGO flakes with different morphologies are internalized at different rates
NGO induces cell differentiation

Publication:

R. G. Mendes et al. J. Mater. Chem. B, 3, 2522-2529 (2015)

R. G. Mendes et. al. Nano Research, 10,1980–1995(2017)