Nanofluidics through a 30-nm aperture nanopipette by applying electrostatic field based on the QTF-AFM system

Author

An, Sangmin ; Kim, Gunn ; Moon, Geol ; Lee, Manhee ; Jahng, Junghoon ; Lee, Kunyoung ; Jhe, Wonho

Author_Institution

Seoul Nat. Univ., Seoul, South Korea

fYear

2010

fDate

17-20 Aug. 2010

Firstpage

1052

Lastpage

1055

Abstract

Nanofluidics of the liquid solution through a 30-nm aperture nanopipette was investgated using the QTF-AFM system. Used pulled nanopipette was attached on the edge of QTF to control the distance between the tip and substrate. Monitored QTF signal was changed by naturally formed water meniscus´s force as tip approached to the sample within 10nm. After forming of water, electric field was applied for the purpose of a filled solution´s extrusion onto the surface. Measured the fluid speed was 43.5 um/s and spread area was 136.6 um² after 5 seconds. During the experiment, temperature was 22 °C and humidity was 20.1 %. Checked thermal drift was 0.3 pm/s.

Keywords

atomic force microscopy; bioMEMS; humidity; nanobiotechnology; nanofluidics; wetting; QTF-AFM system; biotechnology; distance 10 nm; fluid speed; humidity; liquid filled nanopipette; liquid solution nanofluidics; nanopipette aperture; quartz tuning fork atomic force microscope system; size 30 nm; solution extrusion; spread area; temperature 22 degC; thermal drift; time 5 s; water meniscus force;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on

Conference_Location

Seoul

ISSN

1944-9399

Print_ISBN

978-1-4244-7033-4

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2010.5698026

Filename

5698026