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Aslani S, Wahab MF, Kenari ME, Berthod A, Armstrong DW. An examination of the effects of water on normal phase enantioseparations. Anal Chim Acta 2022; 1200:339608. [DOI: 10.1016/j.aca.2022.339608] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 11/28/2022]
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Ziv A, Shoseyov O, Karadan P, Bloom BP, Goldring S, Metzger T, Yochelis S, Waldeck DH, Yerushalmi R, Paltiel Y. Chirality Nanosensor with Direct Electric Readout by Coupling of Nanofloret Localized Plasmons with Electronic Transport. NANO LETTERS 2021; 21:6496-6503. [PMID: 34297582 DOI: 10.1021/acs.nanolett.1c01539] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The detection of enantiopurity for small sample quantities is crucial, particularly in the pharmaceutical industry; however, existing methodologies rely on specific chiral recognition elements, or complex optical systems, limiting its utility. A nanoscale chirality sensor, for continuously monitoring molecular chirality using an electric circuit readout, is presented. This device design represents an alternative real-time scalable approach for chiral recognition of small quantity samples (less than 103 adsorbed molecules). The active device component relies on a gold nanofloret hybrid structure, i.e., a high aspect ratio semiconductor-metal hybrid nanosystem in which a SiGe nanowire tip is selectively decorated with a gold metallic cap. The tip mechanically touches a counter electrode to generate a nanojunction, and upon exposure to molecules, a metal-molecule-metal junction is formed. Adsorption of chiral molecules at the gold tip induces chirality in the localized plasmonic resonance at the electrode-tip junction and manifests in an enantiospecific current response.
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Affiliation(s)
- Amir Ziv
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
| | - Omer Shoseyov
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
| | - Prajith Karadan
- Institute of Chemistry, The Hebrew University, Jerusalem 9290401, Israel
| | - Brian P Bloom
- Chemistry Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Sharone Goldring
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
| | - Tzuriel Metzger
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
| | - Shira Yochelis
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
| | - David H Waldeck
- Chemistry Department, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Roie Yerushalmi
- Institute of Chemistry, The Hebrew University, Jerusalem 9290401, Israel
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram Jerusalem, 9190401 Israel
| | - Yossi Paltiel
- Department of Applied Physics, The Hebrew University, Jerusalem 9190401, Israel
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram Jerusalem, 9190401 Israel
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Hysteresis of retention and enantioselectivity on amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phases in mixtures of 2-propanol and methanol. J Chromatogr A 2018; 1568:149-159. [DOI: 10.1016/j.chroma.2018.07.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 07/03/2018] [Accepted: 07/06/2018] [Indexed: 11/22/2022]
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De Klerck K, Mangelings D, Vander Heyden Y. Supercritical fluid chromatography for the enantioseparation of pharmaceuticals. J Pharm Biomed Anal 2012; 69:77-92. [DOI: 10.1016/j.jpba.2012.01.021] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/18/2012] [Accepted: 01/19/2012] [Indexed: 11/30/2022]
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