Bending Nanotubes with Microbubbles by Claus-Dieter Ohl (Asst Prof) Abstract from the paper: Manipulation and microrheology of carbon nanotubes with laser-induced cavitation bubbles
نویسندگان
چکیده
from the paper: Manipulation and microrheology of carbon nanotubes with laser-induced cavitation bubbles P. A. Quinto-Su, X. H. Huang, R. Gonzalez, T. Wu, and C. D. Ohl Carbon nanotubes and nanorods are among the stiffest materials on Earth with diameters ranging from of a few to hundreds of nanometers and lengths on the order of tens of micrometers. These nanomaterials are prospective candidates for future composite materials with unprecedented elastic properties. However, measuring the stiffness of an individual nanorod or nanotube remained a challenge because it's hard to manipulate individual objects of such small size while exerting sufficiently high forces. A novel method based on bubbles has been developed by the Fluid Mechanics group at the Division of Physics from the Nanyang Technological University in Singapore. They generate a couple of microscopic bubbles very close to the submerged nanotubes using a laser pulse. The flow created by the microbubbles is so fast and localized that it induces a large deflection of the nanotube for a brief moment. A high-speed camera records the shape of the nanotube during this impulsive flow lasting for a few microseconds. The nanotube’s elasticity can then be measured by analyzing the bending deformation and the speed of shape recovery. The authors of the upcoming Physical Review Letter’s article foresee a promising future of this bubble technique to probe the elastic properties of many kinds of nanomaterials due to its ease of implementation.
منابع مشابه
Manipulation and microrheology of carbon nanotubes with laser-induced cavitation bubbles.
Multiwalled carbon nanotubes (MWCNT) are exposed to a transient and strong liquid jet flow created by a pair of differently sized laser-induced cavitation bubbles. The position and size of the bubbles are controlled with a spatial light modulator within a 15 microm thick liquid gap. Depending on the tube's position with respect to this jet flow, rotation, translation, and a bending deformation ...
متن کاملInteraction between two laser-induced cavitation bubbles in a quasi-two dimensional geometry
متن کامل
Fast temperature measurement following single laser-induced cavitation inside a microfluidic gap
Single transient laser-induced microbubbles have been used in microfluidic chips for fast actuation of the liquid (pumping and mixing), to interact with biological materials (selective cell destruction, membrane permeabilization and rheology) and more recenty for medical diagnosis. However, the expected heating following the collapse of a microbubble (maximum radius ~ 10-35 µm) has not been mea...
متن کاملNonspherical laser-induced cavitation bubbles.
The generation of arbitrarily shaped nonspherical laser-induced cavitation bubbles is demonstrated with a optical technique. The nonspherical bubbles are formed using laser intensity patterns shaped by a spatial light modulator using linear absorption inside a liquid gap with a thickness of 40 microm. In particular we demonstrate the dynamics of elliptic, toroidal, square, and V-shaped bubbles....
متن کاملDetachment and sonoporation of adherent HeLa-cells by shock wave-induced cavitation.
The interaction of lithotripter-generated shock waves with adherent cells is investigated using high-speed optical techniques. We show that shock waves permeabilize adherent cells in vitro through the action of cavitation bubbles. The bubbles are formed in the trailing tensile pulse of a lithotripter-generated shock wave where the pressure drops below the vapor pressure. Upon collapse of cavita...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009