Biomaterial-Based Biomimetic Visual Sensors: Inkjet Patterning of Bacteriorhodopsin

Hasegawa, Hiroyuki; Sakamoto, Kairi; Shomura, Kazuya; Sano, Yuka; Kasai, Katsuyuki; Tanaka, Shukichi; Okada-Shudo, Yoshiko; Otomo, Akira

doi:10.1021/acsami.3c07540

Cited by 1 publication

(2 citation statements)

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“…The bR Gabor filters are fabricated by depositing multiple layers of bR nano-ink using a material printer (Fujifilm Dimatix, DMP-2850). 39) As illustrated in Fig. 1(b), the sensitivity curve is multivalued (seven values in this instance) based on the maximum sensitivity in the excitatory region of the Gabor function.…”

Section: Gabor Filtersmentioning

confidence: 99%

“…36) A Gabor filter that emulates the differential response of the bR as excitation and inhibition of the receptive field has been proposed, and direction selectivity has been confirmed. [37][38][39] We attempt to detect the Café Wall illusion using a bR Gabor filter. 40) The filtered image can be obtained simply by scanning the input image without needing a bias power supply and an external operational circuit, as the material has a photovoltaic function and a convolution operation function.…”

Section: Introductionmentioning

confidence: 99%

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Photosynthetic protein-based simple cell receptive fields for detection of Café Wall illusions

Kako-Ito,

Okada-Shudo

2023

Jpn. J. Appl. Phys.

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The differential response of the photosynthetic protein bacteriorhodopsin is highlighted as a means to emulate excitation and inhibition in neural response. We present a neuromorphic device that mimics a simple cell receptive field fabricated by patterning bacteriorhodopsin onto two transparent electrodes and sealing them with an electrolyte solution. The artificial receptive field is characterised as a bandpass filter that simultaneously emulates excitation and inhibition with a single element, requiring no bias power supply or external operating circuitry. The filter was employed to detect the Café Wall illusion, a type of orientation illusion, and demonstrated its ability to replicate the human eye’s perception using only the properties of the protein.

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Section: Gabor Filtersmentioning

confidence: 99%