Chemiresistive/SERS dual sensor based on densely packed gold nanoparticles

• Sanda Boca,
• Cosmin Leordean,
• Simion Astilean and
• Cosmin Farcau

Beilstein J. Nanotechnol. 2015, 6, 2498–2503, doi:10.3762/bjnano.6.259

• demonstrated by the detection of a biologically relevant model analyte, 4-mercaptophenyl boronic acid. Keywords: colloidal nanoparticles; convective self-assembly; interparticle gaps; surface enhanced Raman scattering; chemiresistor; Introduction The development of optical sensors is still following an

• stability of the folic acid-capped AuNPs in the aqueous system [8]. Assembly of gold nanoparticles on IDE In the conventional way, convective self-assembly (CSA) was used for growing thin colloidal films on planar substrates, by particle deposition from a colloidal suspension along the substrate–liquid–air

• triple contact line (called also meniscus) [9][10]. Further, the technique was refined in order to allow for the fabrication of parallel strips of nanoparticle films on various substrates [11]. One such variant was named stop&go convective self-assembly (SG-CSA) [12]. If up to now SG-CSA was employed

Topology assisted self-organization of colloidal nanoparticles: application to 2D large-scale nanomastering

• Hind Kadiri,
• Serguei Kostcheev,
• Daniel Turover,
• Rafael Salas-Montiel,
• Komla Nomenyo,
• Anisha Gokarna and
• Gilles Lerondel

Beilstein J. Nanotechnol. 2014, 5, 1203–1209, doi:10.3762/bjnano.5.132

• pitch varied between 5 to 20 times the diameters of the beads (Figure 1). Self-organization of PS beads on patterned silicon substrate PS beads were deposited on the silicon patterned substrates by a convective self-assembly technique. Figure 1 shows a schematic of the entire process. The ultrasonic