TY  - EJOU
AU  - Zhang, Cheng 
AU  - Wu, Mingge 

TI  - An Analysis of the Stretching Mechanism of a Liquid Bridge in Typical Problems of Dip-Pen Nanolithography By Using Computational Fluid Dynamics
T2  - Fluid Dynamics \& Materials Processing

PY  - 2019
VL  - 15
IS  - 4
SN  - 1555-2578

AB  -  A computational study of the stretching mechanism of a liquid bridge and the effect of the liquid properties on the DPN (dip-pen nanolithography) process is presented. The  results  show  that  the  viscosity  and  contact  angle  can  have  an  appreciable  influence  on  these  processes.  The  greater  the  viscosity,  the  harder  the  liquid  bridge  is  to  break,  which  allows  more  molecular  transfer  during  the  DPN  spotting  process.  Besides,  when  the  contact  angle  between  the  liquid  and  substrate  is  less  than  60  degrees,  the  time  required  to  stretch  the  bridge  and  break  it  grows  with  the  contact  angle.  During  the  stretching  process,  the  pressure  in  the  midsection  (along  the  vertical  direction)  of  the  liquid  bridge  is  relatively  unstable,  with  frequent  changes  in  its  value.  Furthermore,  this  pressure increases sharply when the liquid bridge breaks.
KW  - DPN
KW  -  liquid bridge
KW  -  CFD
KW  -  nanotehnology

DO  - 10.32604/fdmp.2019.08477