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Nanoscale Objects
Examples of Nanoscale Objects
By Anne Marie Helmenstine, Ph.D.
A strand of hair is about 80,000 to 100,000
nanometers wide.
You probably know that a nanometer is
1/1,000,000,000 of a meter or
10-9 meters, but do you have a feel for just how
small a nanometer is?
Here are some examples of nanoscale objects, plus the length of
common objects expressed in nanometers.
The Amazing Smallness of Our World
· Your fingernails grow at the rate of about 1 nanometer per
second.
· A single water molecule is about 1.5 nanometers.
· A strand of human DNA is 2.5 nanometers in diameter.
· A single hemoglobin molecule is 5 nanometers across.
· A single bacterium is about 1,000 nanometers long.
· A strand of hair is about 80,000 to 100,000 nanometers wide.
· A sheet of paper is 100,000 nanometers thick.
· An ant is 5 million nanometers long.
· The human hand is 100 million nanometers long.
· A 7-foot-tall basketball player is 2 billion nanometers tall.
Anne
Marie Helmenstine, Ph.D.
Chemistry
Expert
Education
Ph.D.,
Biomedical Sciences, University of Tennessee at Knoxville
B.A.,
Physics and Mathematics, Hastings College
Introduction
Ph.D.
in biomedical sciences from the University of Tennessee at Knoxville - Oak
Ridge National Laboratory.
Science
educator with experience teaching chemistry, biology, astronomy, and
physics at the high school, college, and graduate levels.
ThoughtCo
and About Education chemistry expert since 2001.
Widely-published
graphic artist, responsible for printable periodic tables and other
illustrations used in science.
Experience
Anne
Helmenstine, Ph.D. has covered chemistry for ThoughtCo and About Education
since 2001, and other sciences since 2013. She taught chemistry, biology,
astronomy, and physics at the high school, college, and graduate levels.
She has worked as a research scientist and also abstracting and indexing
diverse scientific literature for the Department of Energy.
In
addition to her work as a science writer, Dr. Helmenstine currently serves as a
scientific consultant, specializing in problems requiring an interdisciplinary
approach. Previously, she worked as a research scientist and college professor.
Education
Dr.
Helmenstine holds a Ph.D. in biomedical sciences from the University of
Tennessee at Knoxville and a B.A. in physics and mathematics with a minor
in chemistry from Hastings College. In her doctoral work, Dr. Helmenstine
developed ultra-sensitive chemical detection and medical diagnostic tests.
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and Dotdash
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