Absorption of Nanoparticles onto Curved Surfaces

Details

• Personal Author:
  Jao C-Y ; Kandas ILN ; Liu B ; Robinson HD ; Xu Y ; Yi J
• Description:
  We study the adsorption of gold nanospheres onto cylindrical and spherical glass surfaces from stagnant aqueous particle suspensions. The curved surfaces were obtained as tapers and microspheres fabricated from optical fibers and were coated with a nm-thick layer of the polycation polyallylamine hydrochloride, causing irreversible adsorption of the negatively charged spheres. Our results fit well with theory, which predicts that the rates of particle adsorption will depend strongly on the surface geometry. In particular, adsorption is significantly faster on curved than on planar surfaces at times long enough that the particle diffusion length is large compared to the surface curvature. This is of particular importance for plasmonic sensors and other devices where particles are deposited from a suspension onto surfaces which may have non-trivial geometries. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Keywords:
  Adsorption Nanoparticles Nanosphere Sensors Surface Properties
• Publisher:
  American Physical Society (APS)
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Abstract or Summary
• Place as Subject:
  Maryland ; Massachusetts ; OSHA Region 1 ; OSHA Region 3 ; Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20061956
• Citation:
  American Physical Society (APS) March Meeting, February 27-March 2, 2012, Boston, Massachusetts. College Park, MD: American Physical Society (APS), 2012 Feb; :221
• CAS Registry Number:
  Gold (CAS RN 7440-57-5)
• Federal Fiscal Year:
  2012
• NORA Priority Area:
  Construction
• Performing Organization:
  Virginia Polytechnic Institute and State University
• Peer Reviewed:
  False
• Start Date:
  20090901
• Source Full Name:
  American Physical Society (APS) March Meeting, February 27-March 2, 2012, Boston, Massachusetts
• End Date:
  20150131
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:fd47474fc8361e63deed61974ef1e177956203f5abdd273df6208f6e611ca38fe737496bbd6fdb9f957d8a262c6e491f521d74d41796d3d50396bb37b942a88d
• Download URL:
  https://stacks.cdc.gov/view/cdc/225290/cdc_225290_DS1.pdf
• File Type:
  [PDF - 161.21 KB ]