Three-dimensional thermal noise imaging

C Tischer, S Altmann, S Fisinger, JKH Hoerber, EHK Stelzer, EL Florin

Research output: Contribution to journalArticle (Academic Journal)peer-review

68 Citations (Scopus)


We present a scanning probe microscope based on optical tweezers for three-dimensional imaging of the topology of transparent material in the nanometer range. A spherical nanoparticle serves as a probe. An optical trap moves it through the sample (e.g., a polymer network), while the position of the particle center is recorded by three-dimensional interferometry. Accessible volumes are reconstructed from the histogram of thermal position fluctuations of the particle. The resolution in determining the position of surfaces in three dimensions is about 20 nm.
Translated title of the contributionThree-dimensional thermal noise imaging
Original languageEnglish
Pages (from-to)3878 - 3880
Number of pages3
JournalApplied Physics Letters
Publication statusPublished - 2001

Bibliographical note

Publisher: Amer. Inst. Physics


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