Figure 16.

(A) 3D printed dog’s nose including a removable PUF insert within the flow path in the vestibule of the nose that collects inspired DNT vapor (a) and schlieren image of the 3D printed dog’s nose during the inspiratory phase of sniffing (b); Reproduced from [51], with permission from ©2017 Macmillan Publishers Limited, part of Springer Nature (B) SEM images of the fabricated sensor with alumina supported bi-metal catalyst deposited on the electrode by screen printing and inkjet printing. Reproduced from [52], with permission from © 2016 Elsevier B.V; (C) Schematic of the 3D printed virtual impactor integrated with QCM sensor for detecting airborne particles; (D) The virtual impactor fabricated by 3D printed technology; (E) Photograph of the experimental setup for prototype characterization. Reproduced from [53], with permission from © 2016 Elsevier B.V.