Effective Collection and Detection of Airborne Species Using SERS‐Based Detection and Localized Electrodynamic Precipitation

Approaching Gas Phase Electrodeposition: Process and Optimization to Enable the Self‐Aligned Growth of 3D Nanobridge‐Based Interconnects

“…[ 16 ] Others have used this technique to fabricate metallic nanostructures for surface enhanced Raman spectroscopy (SERS). [ 20,21 ] In any event, charged material continues to deposit into locations where charge dissipation can occur, leading to a growth of extended structures much like what is observed in the liquid phase based electrodeposition/plating. This report evaluates the localized growth feature of gas phase electrodeposition as a method to form self-aligned free-standing nanowire interconnects.…”

SERS‐Enabled Lab‐on‐a‐Chip Systems

“…Reproduced with permission. [ 67,68 ] The ordered nanosphere array directly led to a high signal reproducibility of AgFON with an RSD as low as 6.5%. c) SEM image of a monolayer of Au/SiO 2 nanoparticles on a smooth Au surface.…”

Active Matrix‐Based Collection of Airborne Analytes: An Analyte Recording Chip Providing Exposure History and Finger Print

“…In other words, it becomes increasingly unlikely for an analyte molecule at low concentrations to “find” and interact with an ever increasingly small sensor, trading the gained sensitivity with a slow response time. The solution to this problem is to use a directed force to transport the analyte from a distance away to predetermined sensing points at a higher rate, which has recently been discussed elsewhere . This communication adds the ability to collect and store analytes in an active matrix array like fashion, at predetermined points on a surface, at different points in times.…”

“…The use of Coulomb forces has been chosen since localized collection of organic and inorganic nanoparticles has already been demonstrate with an unmatched sub 100 nm lateral resolution. While some sensors based on electrostatic precipitators are known, an active matrix type analyte collection chip has not yet been demonstrated. This communication reports the collection of analytes over a wide range of molecular weights including (i) microscopic particles (Kentucky blue grass pollen, 20 μm in diameter, ∼3 × 10 17 Da), (ii) inorganic nanoparticles (Cu nanoparticles, 40–60 nm in diameter, ∼3.5 × 10 8 Da; CdSeS/ZnS nanoparticles, 6 nm in diameter, ∼3.4 × 10 5 Da), all the way down to (iii) small organic molecules (MEH‐PPV, 1.5 × 10 5 –2.5 × 10 5 Da; Alq 3 , 459.43 Da; anthracene, 178.23 Da; 4‐fluorobenzenethiol 128.17 Da; benzenethiol, 110.19 Da).…”