J. Phys. Chem.. Vol. 99, No. I . 1995 469
Additions and Corrections
ADDITIONS AND CORRECTIONS
1994, Volume 98 J. A. M. Sondag-Huethorst,* C. Schonenberger, and L. G. J. Fokkink : Formation of Holes in Alkanethiol Monolayers on Gold Pages 6827-6833. Due to an error in the printing process, the STM images in Figures 1-8 were not clearly reproduced. The figures are reprinted below.
i
Figure 2. STM image (80
x XI) nm’) of an Auil
I I ) surface with an adsorbed monolayer of dodecanethiol. Image (b) shows the profile of the
dashed line in (a). Tunnel parameters: Vh = I V and I, = 1.5 pA.
Additions and Corrections
470 J. Phys. Chem., Vol. 99, No. I , 1995
...... .....
............ .......... .... ,
.
,
..
Figure 3. Successive scans (70 x 80 nm') of an Au( I I I ) sutidce with an adsorbed monolayer a i dodecanethiol. Tunnel parameters: V , = 0.1 V and I , = 0.1 nA. Under these tunnel conditions the tip disrupts the monolayer: the holes become larger and new holes and step edges appear.
. I Phys. . Cliem., Vol. 99, No. I . 1995
Additions and Corrections
F
Figure 4. STM images (323 x 323 nm2) of the dodecanethiol monolayer before and after measuring Figure 3a-d. The area outlined in (a) represents the scanning area of Figure 3 before imaging. Image (h) is measured directly after measuring Figure 3. Image (c) is measured 60 min (without scanning) after (h). Tunnel parameters: V, = 0.1 V and I, = 0.1 nA.
471
472 J. Phys. Chem.. Vol. 99. No. I , 1995
Additions and Corrections
Figure 5. STM images of an Au( I I I)iuriacc with ,in adwrhrd dndccanethiol monolayer alter rvapination of a m i i l l a i i i i ~ u n l0 1 gold (+I nm). Image ( a ) (80 x 80 nm3 is measured directly after evaporation. The black arrow points IO the evaporated clustered gold. and the white m o w points IO the gold that has already penetrated the thiol layer. Image (h) (60 x 60 nm?)is measured 3 days after evaporation: the evaporated gold has penetrated the thiol layer. Tunnel parameters: Vb = 0.2 V and I, = 2 PA.
J. Phys. Chem., Vol. 99. No. I , 1995 473
Additions and Corrections
I
(a)
I
6ol 50
.I
1 lrni"l
Figure 6. Charactenstics of a dodecanethiol layer after t mi" adsorption from a 3.5 mM thiol solution in methanal. (a) Advancing (filled symbols) and receding (open symbols) contact angles measured with water (circles) and hexadecane (squares). (hi Amount of gold (mAJ dissolved in the thiol solution (surface Au area in contact with the thiol solution was 5 an2). (c) and id) STM images (60 x 60 nm') measured after I min and after more than 10 mi". respectively. The black mows in (c) point to the small holes appeaing between individual areas of ordered CJ3xJ3)R3Oo molecules. Tunnel conditions: V, = 1 V and I, = 1.5 PA.
Additions and Corrections
I
10
. 1
I
20
0
I
8
12
16
20
Figure 7. Charactemtics of an alkanerhiol (C,,H~,+ISH) layer after 25-h adsorption from a 3.5 mM thiol solution in methanol. (a) Advancing (filled symbols) and receding (open symbols) contact angles measured with water (circles) and hexadecane (squares). (b) Amount of gold (mAu)dissolved in the thiol solution (surface area of gold 5 cm2). (c) STM image (100 x 100 nm') of a propanethiol monolayer on gold. Tunnel conditions: V, = 0.1 V and I, = 0.1 nA.
