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Related Experiment Video

Updated: Mar 15, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

23.0K

Selective protein trapping within hybrid nanowells.

G M L Messina1, C Passiu, A Rossi

  • 1Laboratory of Molecular Surfaces and Nanotechnology (LAMSUN), Department of Chemical Sciences, University of Catania and CSGI, Viale A. Doria 6, 95125, Catania, Italy. grmessi@unict.it.

Nanoscale
|September 9, 2016
PubMed
Summary

Researchers developed polymer/gold nanowell arrays for controlling biological processes. These nanostructured surfaces selectively trap proteins like human serum albumin, demonstrating potential for subcellular-level biological control.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Nanotechnology

Background:

  • Nanostructured surfaces enable precise control over biological processes at the subcellular level.
  • Controlling protein interactions is crucial for various biological applications.

Purpose of the Study:

  • To investigate protein trapping mechanisms within novel polymer/gold nanowell arrays.
  • To explore the influence of nanoconfinement on protein orientation, biofunctionality, and trapping selectivity.

Main Methods:

  • Fabrication of large-scale, hexagonally close-packed arrays of polymer/gold nanowells with tunable dimensions (70-100 nm diameter, 15-40 nm depth).
  • Demonstration of nanowell volumes down to 0.3 attolitres and densities up to ~10^9 wells/cm^2.
  • Investigation of protein trapping using human serum albumin and lysozyme, with nanomorphology measurements and antibody linkage analysis.

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Main Results:

  • Selective protein trapping was observed, with human serum albumin efficiently trapped and lysozyme preferentially deposited outside the nanowells.
  • Nanoconfinement induced changes in protein orientation and biofunctionality.
  • Protein trapping selectivity was dependent on the matching/mismatching of biomolecule and nanocavity dimensions, and conformational changes due to nanoconfinement.

Conclusions:

  • The developed nanowell arrays facilitate selective protein trapping, influenced by molecular size, softness, and conformational changes induced by nanoconfinement.
  • Enhanced antibody response to confined proteins suggests modified epitope accessibility and conformational alterations.
  • These findings highlight the potential of nanostructured surfaces for precise control of biological interactions at the nanoscale.