Synthetic moth antennae fabricated as preconcentrator for odor collection

Spencer, Thomas L.; Lavrik, Nickolay V.; Hu, David L.

doi:10.1109/isoen.2017.7968911

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…We made several attempts to conduct experiments at the scale of moth antennae, associated with low Péclet numbers. We created a 1 : 1 mimic of the moth antenna geometry using a NanoScribe three-dimensional printer (Spencer, Lavrik & Hu 2017), but were not able to measure the deposition of particles onto this antenna. We next used fluorescent nano-particles (Chatterjee, Gnanasammandhan & Zhang 2010) which were injected into filtered air using a nebulizer (Greenspan et al 1996).…”

Section: Discussionmentioning

confidence: 99%

Moth-inspired methods for particle capture on a cylinder

Spencer

Mohebbi

Forister³

et al. 2019

J. Fluid Mech.

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Section: Discussionmentioning

confidence: 99%

Moth-inspired methods for particle capture on a cylinder

Spencer

Mohebbi

Forister³

et al. 2019

J. Fluid Mech.

Self Cite

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“…In such a way, it acts as a physical amplifier [106], which could be a great source of inspiration for sensor design. Spencer et al [107] mirrored the structure of moth antennae thanks to an additive fabrication process. This system developed for fundamental understanding purposes could inspire technological devices, as pointed in the review of Jaffar-Bandjee et al [108] (Figure 7d).…”

Section: Increase Of the Sensitivitymentioning

confidence: 99%

Bio-Inspired Strategies for Improving the Selectivity and Sensitivity of Artificial Noses: A Review

Hurot

Scaramozzino

Buhot

et al. 2020

Sensors

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Artificial noses are broad-spectrum multisensors dedicated to the detection of volatile organic compounds (VOCs). Despite great recent progress, they still suffer from a lack of sensitivity and selectivity. We will review, in a systemic way, the biomimetic strategies for improving these performance criteria, including the design of sensing materials, their immobilization on the sensing surface, the sampling of VOCs, the choice of a transduction method, and the data processing. This reflection could help address new applications in domains where high-performance artificial noses are required such as public security and safety, environment, industry, or healthcare.

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“…This will be investigated in a subsequent publication, once a study of the lower level with the sensilla and their sensors is carried out with equivalent depth. Moreover, given their size (micrometric sensilla on a millimetric ramus), the study of the lower level is challenging [31] but progress along those lines has been made very recently [32].…”

Section: Validity Of the Assumptionsmentioning

confidence: 99%

Leakiness and flow capture ratio of insect pectinate antennae

Jaffar-Bandjee

Steinmann

Krijnen

et al. 2020

J. R. Soc. Interface.

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The assumption that insect pectinate antennae, which are multi-scale organs spanning over four orders of magnitude in size among their different elements, are efficient at capturing sexual pheromones is commonly made but rarely thoroughly tested. Leakiness, i.e. the proportion of air that flows within the antenna and not around it, is a key parameter which depends on both the macro- and the microstructure of the antenna as well as on the flow velocity. The effectiveness of a structure to capture flow and hence molecules is a trade-off between promoting large leakiness in order to have a large portion of the flow going through it and a large effective surface area to capture as much from the flow as possible, therefore leading to reduced leakiness. The aim of this work is to measure leakiness in 3D-printed structures representing the higher order structure of an antenna, i.e. the flagellum and the rami, with varying densities of rami and under different flow conditions. The male antennae of the moth Samia cynthia (Lepidoptera: Saturniidae) were used as templates. Particle image velocimetry in water and oil using 3D-printed scaled-up surrogates enabled us to measure leakiness over a wide range of equivalent air velocities, from 0.01 m s −1 to 5 m s −1 , corresponding to those experienced by the moth. We observed the presence of a separated vortex ring behind our surrogate structures at some velocities. Variations in the densities of rami enabled us to explore the role of the effective surface area, which we assume to permit equivalent changes in the number of sensilla that host the chemical sensors. Leakiness increased with flow velocity in a sigmoidal fashion and decreased with rami density. The flow capture ratio, i.e. the leakiness multiplied by the effective surface area divided by the total surface area, embodies the above trade-off. For each velocity, a specific structure leads to a maximum flow capture ratio. There is thus not a single pectinate architecture which is optimal at all flow velocities. By contrast, the natural design seems to be robustly functioning for the velocity range likely to be encountered in nature.

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Synthetic moth antennae fabricated as preconcentrator for odor collection

Cited by 6 publications

References 15 publications

Moth-inspired methods for particle capture on a cylinder

Moth-inspired methods for particle capture on a cylinder

Bio-Inspired Strategies for Improving the Selectivity and Sensitivity of Artificial Noses: A Review

Leakiness and flow capture ratio of insect pectinate antennae

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