Haptic 3D micromanipulation with positioners
M. A. Srinivasan of MIT, USA and UCL, London, with support from TUM-IAS, Munich, has developed a micromanipulator with an haptic interface to enable manual exploration, manipulation, and assembly of micro-structures. In collaboration with A. Schmid of UCL, London, S. Thalhammer of Helmholtz Zentrum, Munich, and R. Yechangunja of Yantric, Inc., USA, he has demonstrated manual grasping and moving of 10 to 100 µm sized objects with direct haptic feedback of the gripping force in real-time, so that the objects can be placed in three dimensions with nanometer precision.
A force-sensing microgripper with 100 µm opening is mounted on an ANPxyz101/NUM stack of attocube’s closed loop positioners. Measured forces by the microgripper in the micro-Newton range are scaled up and exerted on the operator’s fingers through a haptic interface.
Performance Test of the ANPz30/LT at 35 mK and 15 Tesla
The precise performance of nanopositioning elements is of great importance in order to realize instrumental setups which work reliably under extreme environmental conditions. Although attocube systems’ positioners have been tested at low temperatures down to 10 mK and at high magnetic fields up to 28 Tesla, their successful performance has never been demonstrated when both environmental conditions were simultaneously applied. A real challenge, furthermore, is to carry out such a test in a 3He/4He environment due to the fact that 3He carries a magnetic spin which becomes polarized in magnetic fields. This influence on the positioner’s operation was investigated for the first time in this application.
This measurement was realized with the ANPz30/LT - linear z-nanopositioner.
Micromechanical Testing of Silver Nanowires
The small size of specimens often imposes significant challenges for preparation and testing. To overcome these difficulties, Prof. Horacio Espinosa’s group at the Mechanical Engineering Department in Northwestern University, USA, has developed a microelectromechanical system that allows mechanical testing of nanowires (see left figure). The system is capable of simultaneous four-point electrical measurements, therefore enabling piezoresistivity and -electricity measurements.
In order to mount the silver nanowires, they employed an attocube nanomanipulator, composed of three stacked ECS3030 positioners, one for each axis of movement. The nanomanipulator is ositioned inside an SEM chamber and interfaced to the ECC100 piezo-controller outside the chamber.
This measurement was realized with the ECSx3030/Al/RT.
R.A. Bernal, et al., Small 10, 725 (2014)