Recent Advances in Photoelectrochemical Sensing: From Engineered Photoactive Materials to Sensing Devices and Detection Modes

Shu, Jiwu; Tang, Dianping

doi:10.1021/acs.analchem.9b04199

Cited by 731 publications

(352 citation statements)

References 163 publications

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“…The presence of light and concentration of analytes, including reducing agents, readily translate into changes in color, photopotential, capacitance, and conductive properties of PHI, which already suggests its suitability for electro‐ or photochromic applications. While numerous photoelectrochemical sensors have been described, [ 29 ] PHI‐based sensors are distinct in that they have a built‐in memory function, enabled by their optoionic properties, which integratively report on the material's history (illumination, reduction, etc.) through the gradual and stable—that is, non‐volatile—modification of PHI's dielectric and optoelectronic properties.…”

Section: Introductionmentioning

confidence: 99%

Optoelectronics Meets Optoionics: Light Storing Carbon Nitrides and Beyond

Podjaski

Lotsch

2020

Advanced Energy Materials

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Known for decades, Liebig's carbon nitrides have evolved into a burgeoning class of macromolecular semiconductors over the past 10+ years, front and center of many efforts revolving around the discovery of resource‐efficient and high‐performance photocatalysts for solar fuel generation. The recent discovery of a new class of “ionic” 2D carbon nitrides—poly(heptazine imide) (PHI)—has given new momentum to this field, driven both by unconventional properties and the prospect of new applications at the intersection between solar energy conversion and electrochemical energy storage. In this essay, key concepts of the emerging field of optoionics are delineated and the “light storing” ability of PHI‐type carbon nitrides is rationalized by an intricate interplay between their optoelectronic and optoionic properties. Based on these insights, key characteristics and general principles for the de novo design of optoionic materials across the periodic table are derived, opening up new research avenues such as “dark photocatalysis”, direct solar batteries, light‐driven autonomous systems, and photomemristive devices.

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Section: Introductionmentioning

confidence: 99%

Optoelectronics Meets Optoionics: Light Storing Carbon Nitrides and Beyond

Podjaski

Lotsch

2020

Advanced Energy Materials

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“…The major role of Au NPs in these sensing systems is to improve the photoconversion efficiency of the functionalized TiO 2 electrodes upon biorecognition, thereby enhancing the photocurrent. Depending on the assay design, different roles—injection of hot charge carriers, extending the light absorption range, and excitation of charge carriers in TiO 2 via plasmon energy transfer—can be played by the Au NPs upon target binding to modulate the photocurrent [19–21] . More specifically, biorecognition causes the Au NPs to either come into proximity [22] of ( signal‐on ) or move away [20] from ( signal‐off ) the TiO 2 electrodes.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Sensitivity of Photoelectrochemical DNA Biosensing Using Plasmonic DNA Barcodes and Differential Signal Readout

et al. 2021

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Photoelectrochemical biosensors hold great promise for sensitive bioanalysis; however, similar to their electrochemical analogues, they are highly affected by the variable backgrounds caused by biological matrices. We developed a new PEC biosensing strategy that uses differential signal generation, combining signals from two separate but correlated binding events on the biosensor, for improving the limit‐of‐detection, sensitivity, and specificity of PEC DNA biosensors in biological samples. In this assay, the binding of unlabeled target DNA is followed by the capture of a signal amplification barcode featuring a plasmonic nanoparticle. The interaction of the plasmonic barcode with the semiconductive building blocks of the biosensor results in significant signal amplification, and together with differential signal processing enhances the limit of detection and sensitivity of the assay by up to 15‐ and three‐fold, respectively, compared to the previously‐used PEC assays with a single binding event, demonstrating a limit of detection of 3 fM.

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“…The rapidly emerging research of nanotechnology provides exciting new possibilities for developing more and more new nanomaterials for practical use. 15,16 CNPs, one of the most representative nanomaterials, has been widely used for drug and gene delivery, 17,18 biosensors, 19 molecular imaging age, 20 and LN tracing in various surgeries. [21][22][23] CNPs can be absorbed selectively by lymphatics and stain the LNs black after being injected into the submucosal layer around the tumor, and the CNPs would not permeate into the blood capillaries due to different permeability between lymph and blood systems, 24 where CNPs are too large to enter blood circulation, thus leading to few toxic side effects.…”

Section: Introductionmentioning

confidence: 99%

<p>Application of Carbon Nanoparticles in Tracing Lymph Nodes and Locating Tumors in Colorectal Cancer: A Concise Review</p>

Liu

Tan

et al. 2020

IJN

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Background: Accurate lymph node (LN) staging has considerably prognostic and therapeutic value in patients with colorectal cancer (CRC). The purpose of this study is to evaluate the feasibility of applying carbon nanoparticles (CNPs) to track LN metastases in CRC. Methods: Two researchers independently screened publications in PubMed, EMBASE, Cochrane and Ovid MEDLINE databases. The keywords were (carbon nanoparticles OR activated carbon nanoparticles) AND (colon cancer OR rectal cancer OR colorectal cancer). Titles and abstracts of the articles were meticulously read to rule out potential publications. Next, full texts of the ultimately obtained eligible publications were retrieved and analyzed in detail. Results: The search produced 268 publications, and 140 abstracts were identified after a bibliographic review. Finally, 20 studies relevant to our subject were obtained; however, only 14 papers met our inclusion criteria and were included for final review. All studies included have compared the control group with carbon nanoparticles group (control group, defined as nontattooed group; and carbon nanoparticles group, defined as administering carbon nanoparticles during surgery) for their efficacy in intraoperative detecting and positioning. After analysis, appreciably less amount of bleeding (3/5 trials), shorter operation time (2/4 trials), and shorter time to detect lesions and dissect LNs (2/2 trials) were revealed in CNPs group compared to control group. Thirteen studies have recorded the numbers of the harvested LNs in both groups; meanwhile, CNPs group shows superiority to control group in LN retrieval as well (11/13 trials), which also could effectively aid in locating and harvesting more LNs with diameter below 5 mm. Conclusion: The tracing technique for CNPs is a safe and useful strategy both in localizing tumor and tracing LNs in CRC surgery. But there is still a need for more randomized controlled trials to further establish its contribution to patient survival.

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Recent Advances in Photoelectrochemical Sensing: From Engineered Photoactive Materials to Sensing Devices and Detection Modes

Cited by 731 publications

References 163 publications

Optoelectronics Meets Optoionics: Light Storing Carbon Nitrides and Beyond

Optoelectronics Meets Optoionics: Light Storing Carbon Nitrides and Beyond

Enhancing the Sensitivity of Photoelectrochemical DNA Biosensing Using Plasmonic DNA Barcodes and Differential Signal Readout

<p>Application of Carbon Nanoparticles in Tracing Lymph Nodes and Locating Tumors in Colorectal Cancer: A Concise Review</p>

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