atomic force microscopy  - 2024 ACF Fall

Question

The motion of the tip when producing images with this technique determines whether it is described as contact or tapping mode. For 10 points each:

[10h] Name this technique used to produce extremely high resolution images. The deflection of a laser beam is used to measure how much the tip of a cantilever moves in this technique.

ANSWER: atomic force microscopy [or AFM; accept scanning force microscopy or SFM; prompt on microscopy; prompt on scanning probe microscopy; reject “electron microscopy”]

[10m] The scanners in atomic force microscopes have this property. Occurring only in crystals with no inversion symmetry, materials with this property produce a potential difference when subject to mechanical stress.

ANSWER: piezoelectric [accept piezoelectricity; accept piezoelectric effect]

[10e] Cantilevers made of this mineral can be used in piezoelectric detection. This mineral is used in watches and is composed of silicon dioxide.

ANSWER: quartz

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Summary


2024 ACF Fall at Claremont Colleges	fall	Y	5	22.00	100%	80%	40%
2024 ACF Fall at Cornell	fall	Y	8	15.00	100%	38%	13%
2024 ACF Fall at Illinois	fall	Y	8	20.00	100%	63%	38%
2024 ACF Fall at Rutgers	fall	Y	7	17.14	100%	43%	29%
2024 ACF Fall at Rutgers	fall	Y	1	20.00	0%	100%	100%
2024 ACF Fall at Ohio State	fall	Y	7	12.86	100%	29%	0%
2024 ACF Fall at Washington	fall	Y	6	18.33	100%	67%	17%
2024 ACF Fall at Georgia	fall	Y	10	13.00	100%	30%	0%
2024 ACF Fall at North Carolina	fall	Y	8	16.25	100%	38%	25%

Data


Claremont A	Claremont C	0	10	10	20
UCLA B	Claremont B	0	0	10	10
UCSD	UCLA A	10	10	10	30
UCLA E	UCLA C	10	10	10	30
UCLA D	USC	0	10	10	20
Cornell A	Binghamton A	0	0	10	10
Binghamton B	RIT A	0	0	10	10
Cornell D	ESF	10	10	10	30
Cornell G	RIT C	0	0	10	10
Penn State	Binghamton C	0	0	10	10
Cornell E	Syracuse	0	0	10	10
Cornell C	U of Rochester B	0	10	10	20
RIT B	Cornell F	0	10	10	20
WashU B	Chicago B	0	10	10	20
Illinois C	Notre Dame B	0	0	10	10
Iowa A	Purdue C	0	10	10	20
Northwestern B	Chicago A	10	10	10	30
Purdue B	Notre Dame C	10	10	10	30
Illinois D	SIUE	0	0	10	10
Purdue A	WashU A	10	0	10	20
Indiana	Illinois A	0	10	10	20
Maryland B	Fordham A	10	0	10	20
Maryland B	Fordham A	10	0	0	10
Maryland B	Columbia A	0	0	10	10
Columbia B	Penn A	0	0	10	10
Columbia J	Rowan A	10	10	10	30
Princeton A	Bard A	0	10	10	20
Fordham A	Penn B	0	0	10	10
Rutgers B	Maryland A	10	10	10	30
Lehigh A	NYU B	0	0	10	10
Maryland B	Fordham A	10	10	10	30
Maryland B	Fordham A	10	10	0	20
Maryland B	Columbia A	0	10	10	20
Maryland B	Columbia A	0	10	0	10
Maryland B	Columbia A	0	0	0	0
Michigan State B	CWRU A	0	0	10	10
CWRU C	Michigan B	0	0	10	10
Michigan D	Miami A	0	0	10	10
Miami B	Miami C	0	10	10	20
CWRU B	Michigan A	0	10	10	20
Ohio State A	Ohio State C	0	0	10	10
Ohio State B	West Virginia A	0	0	10	10
Alberta	UBC A	0	10	10	20
UW Lust	UBC B	0	10	10	20
UW Chastity	UW Greed	0	10	10	20
Boise State	UW Envy	10	10	10	30
UW Gluttony	UW Wrath	0	0	10	10
UW Pride	UW Sloth	0	0	10	10
UNC B	Appalachian State B	0	0	10	10
VCU	Duke A	0	10	10	20
UNC C	James Madison A	10	10	10	30
Liberty A	Liberty C	0	0	10	10
NC State	Duke B	0	0	10	10
UNC D	Appalachian State A	0	0	10	10
Virginia Tech B	Liberty B	0	10	10	20
Virginia Tech A	Virginia	10	0	10	20
Emory Oxford	Auburn A	0	10	10	20
Tennessee A	Auburn B	0	0	10	10
Furman	Auburn C	0	0	10	10
Belmont	Tennessee B	0	0	10	10
Clemson A	Georgia A	0	10	10	20
Clemson B	Georgia Tech C	0	0	10	10
Georgia Tech E	Georgia Tech A	0	0	10	10
Alabama A	Southern	0	0	10	10
South Carolina B	Vanderbilt A	0	10	10	20
Emory A	South Carolina A	0	0	10	10