Rohrer, Heinrich

▪ Swiss physicist
born June 6, 1933, Switzerland

      Swiss physicist who, with Gerd Binnig (Binnig, Gerd), received half of the 1986 Nobel Prize for Physics for their joint invention of the scanning tunneling microscope. (Ernst Ruska (Ruska, Ernst) received the other half of the prize.)

      Rohrer was educated at the Swiss Federal Institute of Technology in Zürich and received his Ph.D. there in 1960. In 1963 he joined the IBM Research Laboratory in Zürich, where he remained. Binnig also joined the laboratory, and it was there that the two men designed and built the first scanning tunneling microscope. This instrument is equipped with a tiny tungsten probe whose tip, only about one or two atoms wide, is brought to within five or ten atoms' distance of the surface of a conducting or semiconducting material. (An atom is equal to about one angstrom, or one ten-billionth of a metre.) When the electric potential of the tip is made to differ by a few volts from that of the surface, quantum mechanical effects cause a measurable electric current to cross the gap. The strength of this current is extremely sensitive to the distance between the probe and the surface, and as the probe's tip scans the surface, it can be kept a fixed distance away by raising and lowering it so as to hold the current constant. A record of the elevation of the probe is a topographical map of the surface under study, on which the contour intervals are so small that the individual atoms making up the surface are clearly recognizable.

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Universalium. 2010.

Look at other dictionaries:

  • Rohrer, Heinrich — Rohrer , Heinrich …   Scientists

  • Rohrer , Heinrich — (1933–) Swiss physicist Born at Buchs in Switzerland, Rohrer was educated at the Federal Institute of Technology, Zurich, where he obtained his PhD in 1960. After two years postdoctoral work at Rutgers, New Jersey, he returned to Zurich in 1963… …   Scientists

  • Rohrer,Heinrich — Roh·rer (rōʹrər), Heinrich. Born 1933. Swiss physicist. He shared a 1986 Nobel Prize for designing an electron microscope able to scan individual atoms. * * * …   Universalium

  • Rohrer, Heinrich — ► (n. 1933) Físico suizo. Fue premio Nobel de Física en 1986, compartido con G. Binning y E. Ruska, por sus trabajos en óptica electrónica y por la construcción del primer microscopio electrónico y del microscopio de efecto túnel …   Enciclopedia Universal

  • Rohrer — Heinrich …   Scientists

  • Rohrer — Rohrer, Heinrich …   Enciclopedia Universal

  • Heinrich Rohrer — (* 6. Juni 1933 in Buchs SG) ist ein Schweizer Physiker. Er erhielt neben Ernst Ruska 1986 gemeinsam mit Gerd Binnig für die Entwicklung des Rastertunnelmikroskops den Nobelpreis für Physik. Nach seiner Schulzeit schrieb sich Rohrer im… …   Deutsch Wikipedia

  • Rohrer — Rohrer,   Heinrich, schweizerischer Physiker, * Buchs (SG) 6. 6. 1933; seit 1963 Mitarbeiter am IBM Forschungslaboratorium in Rüschlikon. Rohrer entwickelte, ausgehend von Ideen R. Youngs, zusammen mit G. Binnig das Rastertunnelmikroskop, mit dem …   Universal-Lexikon

  • Heinrich Rohrer — Portrait d Heinrich Rohrer. Heinrich Rohrer (6 juin 1933 à Buchs, Suisse) est un physicien suisse. Il est colauréat avec Gerd Binnig d une moitié du prix Nobel de physique de 1986[1] …   Wikipédia en Français

  • Heinrich Rohrer — Heinrich Rohrer …   Wikipedia Español

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