Facile, Real‐Time Identification of Blood Components with Self‐Powered Organic–Inorganic Heterostructure Photodetectors

Park, Taehyun; Kim, Dae-Kwan; Shin, Bongguen; Hur, Jaehyun; Yoo, Hocheon

doi:10.1002/adom.202102542

Cited by 9 publications

(3 citation statements)

References 45 publications

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“…The aforementioned changes in junction properties were further elucidated through IS analyses conducted on devices B9, G9, and F9, representing low, medium, and high reverse currents (Figure 1h). The rectifying behavior of the PN diode is correlated with its depletion characteristics, which can be denoted by a parallel plate capacitor model as follows: [35] Junction capacitance…”

Section: Resultsmentioning

confidence: 99%

Multi‐Dimensional Physically Unclonable Functions: Optoelectronic Variation‐Induced Multi‐Key Generation from Small Molecule PN Heterostructures

Shin,

Ko,

Park

et al. 2024

Adv Funct Materials

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In this era of demanding invulnerable security systems against the threat of hacking, physically unclonable functions (PUFs), especially in which can spawn multiple security keys within a single device, has gained attention. This investigation explores the multi‐key generable PUF devices employing organic small molecules, specifically C8‐BTBT and PTCDI‐C13. The variation stems from the formation of irregular PN junctions, haphazardly configured grain boundaries of C8‐BTBT. A comprehensive analysis including scanning electron microscopy (SEM), atomic force microscopy (AFM), kelvin probe force microscopy (KPFM), impedance spectroscopy (IS), and optical simulation, has been substantiated the underlying mechanisms. Exploiting the photo‐responsive characteristics within the light wavelength spectrum of 660 and 530 nm, alongside the electrical characteristics, the capability to generate a total of 30 distinct multi‐security keys in a single device is been successfully. These keys, distinguished by variable parameters such as voltage, light wavelength, and the calculated photo‐to‐dark current ratio (PDCR), manifest novel quantitative and qualitative dimensions in security protocol customization. Inter‐Hamming distance and entropy of these cryptographic keys exhibit commendable averages of 51.9–53.1%, and 0.81, respectively. Moreover, a noteworthy average bit‐aliasing mean value of 51.9%, derived from four distinct batches, underscores the pragmatic feasibility of the proposed conceptual framework for PUF devices.

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Section: Resultsmentioning

confidence: 99%

Multi‐Dimensional Physically Unclonable Functions: Optoelectronic Variation‐Induced Multi‐Key Generation from Small Molecule PN Heterostructures

Shin,

Ko,

Park

et al. 2024

Adv Funct Materials

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“…For biomaterials, Yoo's research team demonstrated the identification of blood components using an optoelectrical biosensor in 2022. [141] The light absorbance of white blood cells (WBC) and red blood cells (RBC) in the UV region is different. To identify the WBC and RBC in the blood, they constructed a sensing system as shown in Figure 9c.…”

Section: Chemical and Biological Analysismentioning

confidence: 99%

mentioning

confidence: 99%

Unleashing the Power of Quantum Dots: Emerging Applications from Deep‐Ultraviolet Photodetectors for Brighter Futures

Park,

Lee,

Hur

et al. 2023

Advanced Optical Materials

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Since their discovery in 1981, quantum dots (QDs) have been the center of attention in optoelectronic fields owing to their excellent properties such as clearly discrete band structure, high luminous efficiency, and tunable energy bandgap via dot size control. Among them, the bandgap increase characteristic based on the quantum confinement effect opens a new horizon in the field of deep ultraviolet photodetectors (DUV PDs). Emerging applications such as risk monitoring, wireless optical communication, and chemical sensing with extremely low environmental interference raise the significance of DUV PDs. Nonetheless, the limited material selection for DUV absorption has been the main obstacle for further applications. Along this line, this review systematically revisits the recent advances in QD‐based DUV PDs, using bandgap‐widened QDs, with a focus on the synthetic method, device architecture, and interactions among constituent components. Various QDs categorized into carbon, oxide, sulfide, and nitride are reviewed with the specific characteristics of each substance. The future prospects of QD‐based DUV PDs in terms of practical applications and the current challenges are discussed.

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Versatile Papertronics: Photo‐Induced Synapse and Security Applications on Papers

Choi,

Shin,

Kim

et al. 2024

Advanced Materials

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Paper is a readily available material in nature. Its recyclability, eco‐friendliness, portability, flexibility, and affordability make it a favored substrate for researchers seeking cost‐effective solutions. Electronic devices based on solution process are fabricated on paper and banknotes using PVK and SnO2 nanoparticles. The devices manufactured on paper substrates exhibit photosynaptic behavior under ultraviolet pulse illumination, stemming from numerous interactions on the surface of the SnO2 nanoparticles. A light‐modulated artificial synapse device is realized on a paper at a low voltage bias of −0.01 V, with an average recognition rate of 91.7% based on the Yale Face Database. As a security device on a banknote, 400 devices in a 20 × 20 array configuration exhibited random electrical characteristics owing to the local morphology of the SnO2 nanoparticles and differences in the depletion layer width at the SnO2/PVK interface. The security Physically Unclonable Functions (PUF) key based on the current distribution extracted at −1 V show unpredictable reproducibility with 50% uniformity, 48.7% inter‐Hamming distance, and 50.1% bit‐aliasing rates. Moreover, the device maintained its properties for more than 210 days under a curvature radius of 8.75 mm and bias and UV irradiation stress conditions.

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Facile, Real‐Time Identification of Blood Components with Self‐Powered Organic–Inorganic Heterostructure Photodetectors

Abstract: Yong-in, South Korea) for enhancing the wettability of the surface. The contact angles of various blood samples on surface-modified quartz were analyzed with a contact angle meter (DSA 100, KRUSS, Hamburg, Germany) (Figure S13, Supporting Information).

Cited by 9 publications

References 45 publications

Multi‐Dimensional Physically Unclonable Functions: Optoelectronic Variation‐Induced Multi‐Key Generation from Small Molecule PN Heterostructures

Multi‐Dimensional Physically Unclonable Functions: Optoelectronic Variation‐Induced Multi‐Key Generation from Small Molecule PN Heterostructures

Unleashing the Power of Quantum Dots: Emerging Applications from Deep‐Ultraviolet Photodetectors for Brighter Futures

Versatile Papertronics: Photo‐Induced Synapse and Security Applications on Papers

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