October+19-20

October 19th: -started new hours -3:30 to 5:30 Wed/Thurs instead of 3:30 to 6:00 Wed/Thurs -this is due to Chris now coming Thurs/Fri- we both shortened our hours

-Scanning Au(III) exposed to beta source -fully exposed, not half-exposed

-I cut a new tip before starting the scans -approached in about 5 minutes

10-19-11AA -setpoint: 3 nA -p-gain: 8000 -i-gain: 800 -tip voltage: 0.1 V -good area, decided to zoom in on plateau in the middle with circular craters

10-19-11AB -setpoint: 1 nA -p-gain: 8000 -i-gain: 800 -tip voltage: 50 mV -the image kept going to black so i retracted the tip and cut a new tip -it finally approached with the above settings -the final image was pretty indistinct -little definition and few features -moved scan area to the right for next image because of possible mound i saw on the right towards the middle

10-19-11AC -setpoint: 3 nA -p-gain: 8000 -i-gain: 800 -tip voltage: 50 mV -very noisy scan, lots of interference, especially towards the top

10-19-11AD -setpoint: 1 nA -p-gain: 5000 -i-gain: 500 -tip voltage: .05 V -same area as above but with less sensitive settings -will

10-19-11AE -setpoint: 1 nA -p-gain: 9000 -i-gain: 800 -tip voltage: .05 V -rotated image 90 degrees, y-slope 4 degrees -the ridges were in fact real and not noise as shown by rotating the image 90 degrees

October 20th:

-same sample as yesterday -Scanning Au(III) exposed to beta source- fully exposed, not half-exposed -the tip approached quickly with good image quality

10-20-11AA -setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV - x-slope: 2 -good image quality -significant flaking, relatively flat

10-20-11AB -setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV -x-slope: 1 --possible double tip, will try another image and see if it clears up



10-20-11AC -setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV -x-slope: 2 -used this scan to check if there is a double tip -definitely a double tip

10-20-11AD -cut a new tip which corrected double tip problem

-setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV -x-slope: 2

10-20-11AE -more noise present, may shave tip again -setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV -x-slope: 2

10-20-11AF -setpoint: 1 nA -p-gain: 10000 -i-gain: 1000 -tip voltage: 50 mV -x-slope: 1

10-20-11AG -setpoint: 1 nA -p-gain: 9000 -i-gain: 900 -tip voltage: 50 mV -x-slope: 0

10-20-11AH -setpoint: 1 nA -p-gain: 9000 -i-gain: 900 -tip voltage: 50 mV -x-slope: 0 -relatively flat image, save a dip at the bottom -more large flakes towards the top