Nanoparticle Self-assembly at Liquid-liquid Interface
| Authors | Akash Mishra1, Sunita Srivastava2 |
| Affiliations |
1 Centre for Research in Nanotechnology and Science, IIT Bombay, Powai, Mumbai, India 2 Department of Physics, IIT Bombay, Powai, Mumbai, India |
| Е-mail | sunita.srivastava@iitb.ac.in |
| Issue | Volume 13, Year 2021, Number 2 |
| Dates | Received 10 January 2021; revised manuscript received 25 March 2021; published online 09 April 2021 |
| Citation | Akash Mishra, Sunita Srivastava, J. Nano- Electron. Phys. 13 No 2, 02016 (2016) |
| DOI | https://doi.org/10.21272/jnep.13(2).02016 |
| PACS Number(s) | 87.64Dz, 52.70.Kz |
| Keywords | Langmuir-Blodgett technique, Lipid monolayer, Atomic force microscopy (9) , DMTAP, Liquid-liquid interface, UV-Vis spectroscopy, Zeta potential. |
| Annotation |
We present our experimental results based on the interfacial assembly of the nanoparticle biomolecule membrane hybrid at the liquid-liquid interface. The adsorption dynamics of positively charged lipid 1,2-dimyristoyl-3-trimethylammonium-propane (DMTAP), at the water-chloroform (W/Chl) interface is investigated via the in-situ measurement of the interfacial surface tension using the Langmuir Blodgett technique. The result based on measurements of the surface tension for various concentrations of the DMTAP lipid molecules reveals that the absorption of molecules at the W/Chl increases with an increase in DMTAP concentration. The citrate coated negatively charged gold nanoparticle (Au NPs) assembly at the positively charge lipid membrane were achieved via electrostatic attraction between the Au NPs and lipid bio-membrane. The surface morphology of the 2D lipid membrane and the Au NPs/lipid complex were characterized ex-situ using atomic force microscopy (AFM) by transferring the Au NPs/lipid complex at the interface, onto the solid substrate using the Langmuir-Blodgett (LB) technique. The ex-situ AFM and the in-situ surface tension data indicate that the adsorption of the lipid molecules improves with an increase in concentration. The AFM data reveals the formation of high-density Au NP film at the interface. |
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