Abstract: An example apparatus comprises includes a first reservoir to store a biologic sample containing a cell, a microfluidic channel fluidically coupled to the first reservoir, and circuitry. The microfluidic channel includes a constriction region including a first circumference that is attenuated from remaining portions of the microfluidic channel, and a fluidic pump disposed within the microfluidic channel. The circuitry is to activate the fluidic pump to direct flow of the cell from the first reservoir to the microfluidic channel and through the constriction region.

Abstract: A surface enhanced luminescence (SELS) sensor may include a substrate and nano fingers projecting from the substrate. Each of the nano fingers may include a polymer pillar having a sidewall and a top, a coating layer covering the sidewall and a metal cap supported by and in contact with the top of the pillar.

Abstract: Blood being circulated to mimic the environment it naturally inhabits increases growth of cultures including bacteria for analysis. The present disclosure presents examples of a device, method, computer-readable medium, and other techniques for simulating a natural environment for blood. The techniques may include a channel with a hydrophobic interior surface and a fluid mover to encourage continuous fluid flow through the channel. The techniques may further include a gas exchange opening of the channel that exposes a fluid to gas outside of the channel.

Abstract: A surface enhanced Raman spectroscopy (SERS) sensor may include a nano structured surface and a nonstoichiometric oxide layer. The nano structured surfers may include a first peak, a second peak and a valley between the first peak and the second peak. The non-stoichiometric oxide layer may include a first portion on the first peak and a second portion on the second peak.

Abstract: A surface enhanced luminescence analyte interrogation stage may include a substrate and an array of pillars projecting from the substrate. Each of the pillars may include a polymeric post formed from a first material and a cap on the polymeric post. The cap has a plasmonic surface and is formed from a second material different than the first. A sacrificial coating covers the cap of each of the pillars.

Abstract: A surfaced enhanced luminescence analyte interrogation stage shipping and storage package may include a sealed chamber, a liquid contained within the sealed chamber and nano pillars within the sealed chamber and submersed within the liquid. The nano pillars comprise polymer posts and metallic caps forming tips of the nano pillars.

Abstract: An example of an apparatus includes a plurality of wells, wherein each well is to receive a cell culture and a cell culture liquid. The apparatus also includes a collector to contact the cell culture liquid in a well selected from the plurality of wells. The collector is to draw a microfluidic sample of the cell culture liquid from the well. In addition, the apparatus includes a sensor substrate to receive the microfluidic sample, wherein the sensor substrate is to be used to measure a characteristic of the cell culture liquid. Also, the apparatus includes a microfluidic channel to transport the microfluidic sample from the collector to the sensor substrate.

Abstract: A plasmonic analyte interrogation stage may include a plasmonically active surface and a transition metal photocatalytic layer on the plasmonically active surface.

Abstract: A surface enhanced luminescence (SELS) sensor may include a substrate and nano fingers projecting from the substrate. Each of the nano fingers may include a polymer pillar having a sidewall and a top, a coating layer covering the sidewall and a metal cap supported by and in contact with the top of the pillar.

Abstract: A surfaced enhanced luminescence analyte interrogation stage shipping and storage package may include a sealed chamber, a liquid contained within the sealed chamber and nano pillars within the sealed chamber and submersed within the liquid. The nano pillars comprise polymer posts and metallic caps forming tips of the nano pillars.

Abstract: A surface enhanced luminescence analyte interrogation stage may include a substrate and an array of pillars projecting from the substrate. Each of the pillars may include a polymeric post formed from a first material and a cap on the polymeric post. The cap has a plasmonic surface and is formed from a second material different than the first. A sacrificial coating covers the cap of each of the pillars.

Abstract: An example of an apparatus includes an inlet to receive a plurality of cells suspended in a solution. The apparatus also includes a microfluidic channel to transport the plurality of cells suspended in the solution. In addition, the apparatus includes a trap disposed along the microfluidic channel, wherein the trap is to isolate the plurality of cells suspended in the solution. Also, the apparatus includes a buffer supply to dispense a buffer to wash the plurality of cells and to remove the solution from the microfluidic channel. The apparatus further includes a sensor to measure a characteristic of the plurality of cells after isolated from the solution.

Abstract: A chromatography-surface enhanced luminescence (SEL) sensing system may include a chromatography subsystem to separate a sample into eluate fractions having different elution times, an SEL stage and an eluate fraction dispenser. The eluate fraction dispenser is to direct different eluate fractions onto distinct regions of the SEL stage based upon the different elution times.

Abstract: A microfluidic chip may include a substrate, chamber supported by the substrate, a sacrificial material in the chamber, a spectroscopically active nano particle assembly anchored within the chamber by the sacrificial material and a fluid supply port connected to the chamber. Each spectroscopically active nano particle assembly may include a cluster of nanoparticles.

Abstract: A spectroscopically active nano-particle assembly is provided. The nano-particle assembly includes a cluster of metallic nano-particles. A first protective coating is formed over a first side of the cluster, and a second protective coating is formed over a second side of the cluster, wherein the second side of the cluster is opposite the first side.

Abstract: A surface enhanced Raman spectroscopy (SERS) sensor may include a nano structured surface and a nonstoichiometric oxide layer. The nano structured surfers may include a first peak, a second peak and a valley between the first peak and the second peak. The non-stoichiometric oxide layer may include a first portion on the first peak and a second portion on the second peak.

Abstract: A microfluidic chip may include a substrate, chamber supported by the substrate, a sacrificial material in the chamber, a spectroscopically active nano particle assembly anchored within the chamber by the sacrificial material and a fluid supply port connected to the chamber. Each spectroscopically active nano particle assembly may include a cluster of nanoparticles.