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Biomedical metallic materials based on nanocrystalline and nanoporous microstructures: Properties and applications. Nanomedicine (Lond) 2023. [DOI: 10.1016/b978-0-12-818627-5.00030-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023] Open
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Kund J, Romer J, Oswald E, Gaus AL, Küllmer M, Turchanin A, von Delius M, Kranz C. Pd‐Modified De‐alloyed Au‐Ni‐Microelectrodes for In Situ / Operando Mapping of Hydrogen Evolution. ChemElectroChem 2022. [DOI: 10.1002/celc.202200071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Julian Kund
- Ulm University: Universitat Ulm Institute of Analytical and Bioanalytical Chemistry GERMANY
| | - Jan Romer
- Ulm University: Universitat Ulm Institute of Analytical and Bioanalytical Chemistry GERMANY
| | - Eva Oswald
- Ulm University: Universitat Ulm Institut of Analytical and Bioanalytical Chemistry GERMANY
| | - Anna-Laurine Gaus
- Ulm University: Universitat Ulm Institute of Organic Chemistry GERMANY
| | - Maria Küllmer
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Physical Chemistry GERMANY
| | - Andrey Turchanin
- Friedrich-Schiller-Universität Jena: Friedrich-Schiller-Universitat Jena Institute of Physical Chemistry GERMANY
| | - Max von Delius
- Ulm University: Universitat Ulm Institute of Organic Chemistry GERMANY
| | - Christine Kranz
- University of Ulm Institute of Analytical and Bioanalytical Chemistry Albert-Einstein-Allee 11 89081 Ulm GERMANY
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Downs AM, Gerson J, Hossain MN, Ploense K, Pham M, Kraatz HB, Kippin T, Plaxco KW. Nanoporous Gold for the Miniaturization of In Vivo Electrochemical Aptamer-Based Sensors. ACS Sens 2021; 6:2299-2306. [PMID: 34038076 DOI: 10.1021/acssensors.1c00354] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Electrochemical aptamer-based sensors enable real-time molecular measurements in the living body. The spatial resolution of these measurements and ability to perform measurements in targeted locations, however, is limited by the length and width of the device's working electrode. Historically, achieving good signal to noise in the complex, noisy in vivo environment has required working electrode lengths of 3-6 mm. To enable sensor miniaturization, here we have enhanced the signaling current obtained for a sensor of given macroscopic dimensions by increasing its surface area. Specifically, we produced nanoporous gold via an electrochemical alloying/dealloying technique to increase the microscopic surface area of our working electrodes by up to 100-fold. Using this approach, we have miniaturized in vivo electrochemical aptamer-based (EAB) sensors (here using sensors against the antibiotic, vancomycin) by a factor of 6 while retaining sensor signal and response times. Conveniently, the fabrication of nanoporous gold is simple, parallelizable, and compatible with both two- and three-dimensional electrode architectures, suggesting that it may be of value to a range of electrochemical biosensor applications.
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Affiliation(s)
- Alex M. Downs
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Julian Gerson
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - M. Nur Hossain
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C1A4, Canada
| | - Kyle Ploense
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Michael Pham
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C1A4, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Tod Kippin
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, California 93106, United States
- The Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Kevin W. Plaxco
- Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
- Center for Bioengineering, University of California Santa Barbara, Santa Barbara, California 93106, United States
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Otero F, Magner E. Biosensors-Recent Advances and Future Challenges in Electrode Materials. SENSORS (BASEL, SWITZERLAND) 2020; 20:E3561. [PMID: 32586032 PMCID: PMC7349852 DOI: 10.3390/s20123561] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/17/2020] [Accepted: 06/19/2020] [Indexed: 12/15/2022]
Abstract
Electrochemical biosensors benefit from the simplicity, sensitivity, and rapid response of electroanalytical devices coupled with the selectivity of biorecognition molecules. The implementation of electrochemical biosensors in a clinical analysis can provide a sensitive and rapid response for the analysis of biomarkers, with the most successful being glucose sensors for diabetes patients. This review summarizes recent work on the use of structured materials such as nanoporous metals, graphene, carbon nanotubes, and ordered mesoporous carbon for biosensing applications. We also describe the use of additive manufacturing (AM) and review recent progress and challenges for the use of AM in biosensing applications.
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Affiliation(s)
| | - Edmond Magner
- Department of Chemical Sciences and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland;
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Wittstock A, Wichmann A, Bäumer M. Nanoporous Gold as a Platform for a Building Block Catalyst. ACS Catal 2012. [DOI: 10.1021/cs300231u] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arne Wittstock
- Lawrence Livermore National Laboratory, NSCL, 7000 East Avenue, Livermore,
California 94550, United States
| | - Andre Wichmann
- Centre for Environmental Research
and Sustainable Technology and Institute of Applied and Physical Chemistry, University Bremen, Leobener Strasse NW2, 28359 Bremen,
Germany
| | - Marcus Bäumer
- Centre for Environmental Research
and Sustainable Technology and Institute of Applied and Physical Chemistry, University Bremen, Leobener Strasse NW2, 28359 Bremen,
Germany
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