Which two events led to the expansion of the field of nanotechnology?
a. A lecture titled "There's Plenty of Room at the Bottom" and development of carbon nanotubes
b. Creation of the Project on Emerging Nanotechnologies and use of quantum dots
c. Development of the subdisciplines of nanofabrication and nanomedicine
d. Invention of the scanning tunneling microscope and the discovery of fullerenes
ANS: D
The invention of the scanning tunneling microscope and the discovery of fullerenes were the two events that led to the expansion of the field of nanotechnology.
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