An aerosol-based soft lithography to fabricate nanoscale silver dots and rings for spectroscopic applications

Abstract

Site-selective deposition of aerosol Pd nanoparticles on a substrate was employed to fabricate nanoscale Ag dots and rings through a subsequent electroless deposition. The fabricated nanoscale dot and ring arrays respectively showed properties in surface-enhanced Raman (SER, with a 1.8 × 10(5) enhancement factor) and Fourier transform near infrared (FT-NIR, at 6153 cm(-1) absorption band) spectra.

Green manufacturing of metallic nanoparticles: a facile and universal approach to scaling up

“…25,28,29 This technique have focused on fabricating NPs using spark ablation (at low frequencies) for a number of new applications (Table S1). 3,6,7,19,25,29,[33][34][35][36][37][38]31,[39][40][41][42][43][44] Note that carrier gases and electrodes determine the particle composition. 25 Although manufacturing electrodes may not be particularly green, the use of recycled metals allows the green manufacturing of NPs.…”

Combined In Situ Spectroscopies Reveal the Ligand Ordering-Modulated Photoluminescence of Upconverting Nanoparticles

“…The luminescent inorganic nanoparticles (NPs), such as trivalent lanthanide (Ln 3+ )-doped nanoparticles, quantum dots (QDs), and noble metal NPs, have become the research hotspot in the fields ranging from displays to biological imaging and sensing. − Albeit of the outstanding physical and chemical stability of their inorganic core as compared to organic chromophores, the optical properties of the NPs are sensitive to the complicated surface chemistries such as capping ligands and solvents. − Through vibrational coupling or altering the electronic states, the surface molecules heavily influence the photoluminescence (PL) performance of the nanoparticles. − As the role of chemical variations of the capping molecules in e.g ., anchoring groups and the chain length has been extensively studied, knowledge about the influence of the physical variations of the capping ligands, especially the effect of ligand conformation on the excitation energy dissipation scheme of the NPs, is still scarce and often controversial. − One main obstacle lies in the lack of a powerful tool for characterizing the ligand conformation when surveying the ligand–NP interactions . Previously, the capping ligands of the luminescent NPs were generally probed using the conventional spectroscopy techniques such as Fourier-transform infrared (FTIR) absorption and spontaneous Raman spectroscopy.…”

Self-Assembly of Silver Nanowire Ring Structures Driven by the Compressive Force of a Liquid Droplet

“…Applications of ring-shaped nanomaterials can be found in various other fields, such as superconducting structures, biosensors, , solar cells, and optical absorbers . In particular, silver nanowires (Ag NWs) have been suggested to be potential ring-shaped nanomaterials because of their outstanding electrical conductivity and high surface plasmon resonance. − Thus, some researchers have tried to fabricate the deformed Ag NWs with comprehensive theories and experiments, including a previous report on Ag-pTh (polythiophene) composite nanospiral structures . This was a very valuable study and provided evidence that Ag NWs could be deformed into perfect ring-shaped structure.…”