Semi-transparent reduced graphene oxide temperature sensor on organic light-emitting diodes for fingerprint liveness detection of smartphone authentication

Jung, Hanyung; Lee, Hyunkoo

doi:10.1016/j.sna.2021.112876

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…The integration of a transparent temperature sensor with a smartphone can be used not only to detect thermal runaway but also to prevent fingerprint copying [9] in on-screen fingerprint authentication processes.…”

Section: Resultsmentioning

confidence: 99%

“…[7] CNTs and graphene are used not only as electrode materials, but also as sensing materials. [8] The sensors fabricated using these materials are expected to be introduced in displays, [9] for the measurement of deformations in the human face, [7] and for breathing rate detection. [10] In addition to transparency and ultraflexibility, high gas permeability has been identified as a requisite sensor property in recent years.…”

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confidence: 99%

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Transparent and Breathable Ion Gel‐Based Sensors toward Multimodal Sensing Ability

Isano

Fujita

Murakami

et al. 2022

Adv Materials Technologies

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Polymer thin‐film sensors have attracted considerable attention in various applications owing to their highly transparent, flexible, and gas‐permeable features. However, conventional thin‐film sensors based on nanomaterials suffer from poor selectivity in sensing targets and scalability of functions. Therefore, a new approach is required for achieving higher selectivity with simple processibility. This study proposes highly transparent, ultra‐flexible, and gas‐permeable polymer thin‐film sensors using ion gels as the sensing material; the sensors demonstrated the capacity for selective detections. Particularly, this study demonstrates simultaneous and independent sensing of temperature and humidity as a proof of concept. The sensors are fabricated using a simple spray coating method on a thin silicone rubber film (≈25 µm thickness). Owing to their thin‐film shape, the sensors exhibit more than 80% visible light transmittance and a higher gas permeability than the human transepidermal water loss. The temperature and humidity are simultaneously detected with a high sensitivity of 15.4% °C–1 and 2.0% per percentage of the relative humidity, respectively, using gels containing two different ionic liquids (ILs). The results suggest that the easily modifiable nature of ILs enables the fabrication of ultra‐flexible and transparent sensors that can detect various objects using a simple method.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Transparent and Breathable Ion Gel‐Based Sensors toward Multimodal Sensing Ability

Isano

Fujita

Murakami

et al. 2022

Adv Materials Technologies

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“…Liveness detection methods for fingerprints can be classified as hardware-based or software-based. Hardware-based methods use additional hardware devices to obtain the biological features unique to real fingers, such as sensors that detect skin temperature [2] or bioelectrical signals [3]. However, fingermarks lack these vital features.…”

Section: Related Workmentioning

confidence: 99%

Signed Fingermark Liveness Detection Method Based on Deep Residual Networks and Multimodal Decision Fusion

Zhang,

Zhou,

Wang

et al. 2024

Applied Sciences

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Fingermarks play an important role in document identification. At the same time, fingermarks on paper documents are often accompanied by signatures and background text, which introduce noise to the original fingermark textures and increase the difficulty of detection. A signed fingermark detection method based on deep residual networks and a decision-level fusion strategy was proposed to defend against spoofing attacks from fake fingermarks. Firstly, the multi-scale structure was introduced in the residual module, which improved the network’s depth and breadth without increasing the parameters. Then, the multi-probability label strategy was refined and employed to enhance the local encoding ability of the feature extraction. A score fusion strategy was designed, with weights allocated based on the difference in signed interference levels of local image blocks. Finally, a model fusion strategy based on evidence theory was suggested, which improved detection accuracy by leveraging complementarity between models. A large-scale fingermark database was established, which included real fingermarks made from real fingers and fake fingermarks made from various materials, and this was divided into two sub databases: signed and unsigned. The experimental results show that the proposed method achieves 96.16% accuracy based on the fingerprint dataset of the global liveness detection competition called LivDet2017 and achieves 99.30% accuracy based on the signed fingermark database, while it has good resistance to spoofing attacks from unknown materials.

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“…Graphene has good flexibility and electrical and thermal conductivities and is widely used in wearable, flexible temperature sensors. LSG-based temperature sensors have high wearability, a fast response time, small size, etc 138 . The principle used for temperature detection is as follows.…”

Section: Temperature Sensorsmentioning

confidence: 99%

Laser-scribed graphene for sensors: preparation, modification, applications, and future prospects

Liu¹,

Zhang²,

Zhang³

et al. 2023

gxjzz

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Sensors are widely used to acquire biological and environmental information for medical diagnosis, and health and environmental monitoring. Graphene is a promising new sensor material that has been widely used in sensor fabrication in recent years.Compared with many other existing graphene preparation methods, laser-scribed graphene (LSG) is simple, low-cost, environmentally friendly, and has good conductivity and high thermal stability, making it widely used in the sensor field. This paper summarizes existing LSG methods for sensor fabrication. Primary LSG preparation methods and their variants are introduced first, followed by a summary of LSG modification methods designed explicitly for sensor fabrication. Subsequently, ACCEPTED ARTICLE PREVIEW2 the applications of LSG in stress, bio, gas, temperature, and humidity sensors are summarized with a particular focus on multifunctional integrated sensors. Finally, the current challenges and prospects of LSG-based sensors are discussed.

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Semi-transparent reduced graphene oxide temperature sensor on organic light-emitting diodes for fingerprint liveness detection of smartphone authentication

Cited by 15 publications

References 31 publications

Transparent and Breathable Ion Gel‐Based Sensors toward Multimodal Sensing Ability

Transparent and Breathable Ion Gel‐Based Sensors toward Multimodal Sensing Ability

Signed Fingermark Liveness Detection Method Based on Deep Residual Networks and Multimodal Decision Fusion

Laser-scribed graphene for sensors: preparation, modification, applications, and future prospects

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