CHEM 3493

Contact Mode and Tapping Mode

CdSe/ZnS QDs 10x Diluted (org. conc.=5mg/mL)

Topo

grap

hyLa

tera

l For

ce

3 µm2 2 µm2 1 µm2

CdSe/ZnS QDs 10x Diluted (org. conc.=5mg/mL; new area)

Topo

grap

hyLa

tera

l For

ce

2 µm2 500 nm2 Height Profile

http://www.spectro.jussieu.fr/Optquant/Semi_conducteurs/Nanocristaux/index_nanocrystals.html

Particle Size=6.3 nm

PEG-silane Rings (prepared by particle lithography combined with vapor depostion)

Topography

Amplitude

Phase

2[METHOXY(POLYETHYLENEOXY)PROPYL]TRICHLOROSILANE

PEG-silane

3 µm

3 µm

3 µm

1.5 µm 1 µm

1.5 µm

1.5 µm

1 µm

1 µm

PEG-silane Rings (prepared by particle lithography combined with vapor depostion)

250 nm

80 nm

250 nm

80 nm

Topography Phase

Topography Lateral Force

Nanografting (C12 SAM)

Topography Height Profile

Nanografting (C12 SAM)