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Lininger A, Palermo G, Guglielmelli A, Nicoletta G, Goel M, Hinczewski M, Strangi G. Chirality in Light-Matter Interaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2107325. [PMID: 35532188 DOI: 10.1002/adma.202107325] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 04/07/2022] [Indexed: 06/14/2023]
Abstract
The scientific effort to control the interaction between light and matter has grown exponentially in the last 2 decades. This growth has been aided by the development of scientific and technological tools enabling the manipulation of light at deeply sub-wavelength scales, unlocking a large variety of novel phenomena spanning traditionally distant research areas. Here, the role of chirality in light-matter interactions is reviewed by providing a broad overview of its properties, materials, and applications. A perspective on future developments is highlighted, including the growing role of machine learning in designing advanced chiroptical materials to enhance and control light-matter interactions across several scales.
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Affiliation(s)
- Andrew Lininger
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giovanna Palermo
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Alexa Guglielmelli
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Giuseppe Nicoletta
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
| | - Madhav Goel
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Michael Hinczewski
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
| | - Giuseppe Strangi
- Department of Physics, Case Western Reserve University, 2076 Adelbert Rd, Cleveland, OH, 44106, USA
- Department of Physics, NLHT-Lab, University of Calabria and CNR-NANOTEC Istituto di Nanotecnologia, Rende, 87036, Italy
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2
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Takahashi H, Baba Y, Yasui T. Oxide nanowire microfluidics addressing previously-unattainable analytical methods for biomolecules towards liquid biopsy. Chem Commun (Camb) 2021; 57:13234-13245. [PMID: 34825908 DOI: 10.1039/d1cc05096f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nanowire microfluidics using a combination of self-assembly and nanofabrication technologies is expected to be applied to various fields due to its unique properties. We have been working on the fabrication of nanowire microfluidic devices and the development of analytical methods for biomolecules using the unique phenomena generated by the devices. The results of our research are not just limited to the development of nanospace control with "targeted dimensions" in "targeted arrangements" with "targeted materials/surfaces" in "targeted spatial locations/structures" in microfluidic channels, but also cover a wide range of analytical methods for biomolecules (extraction, separation/isolation, and detection) that are impossible to achieve with conventional technologies. Specifically, we are working on the extraction technology "the cancer-related microRNA extraction method in urine," the separation technology "the ultrafast and non-equilibrium separation method for biomolecules," and the detection technology "the highly sensitive electrical measurement method." These research studies are not just limited to the development of biomolecule analysis technology using nanotechnology, but are also opening up a new academic field in analytical chemistry that may lead to the discovery of new pretreatment, separation, and detection principles.
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Affiliation(s)
- Hiromi Takahashi
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Yoshinobu Baba
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.,Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.,Institute of Quantum Life Science, National Institutes for Quantum Science and Technology, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Takao Yasui
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.,Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.,Japan Science and Technology Agency (JST), PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan.
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3
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Qiao T, Ma LY, Wang X, Shi ZG. The flow-through silica as the matrix to immobilize gold nanoparticles for HPLC applications. J LIQ CHROMATOGR R T 2018. [DOI: 10.1080/10826076.2017.1421552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ting Qiao
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Li-yun Ma
- Department of Pharmacy, Union Hospital of Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoling Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
| | - Zhi-Guo Shi
- Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, China
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4
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Adam V, Vaculovicova M. CE and nanomaterials - Part II: Nanomaterials in CE. Electrophoresis 2017; 38:2405-2430. [DOI: 10.1002/elps.201700098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Vojtech Adam
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Marketa Vaculovicova
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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5
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Chemical Separation on Silver Nanorods Surface Monitored by TOF-SIMS. J CHEM-NY 2017. [DOI: 10.1155/2017/1608056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The article introduces a possible chemical separation of a mixture of two compounds on the metal nanorods surface. A silver nanorods surface has been prepared by controlled electrochemical deposition in anodic alumina oxide (AAO) template. Rhodamine 6G and 4-aminothiophenol have been directly applied to the sampling point on a silver nanorods surface in an aliquot mixture. The position of the resolved compounds was analysed by time-of-flight secondary ion mass spectrometry (TOF-SIMS) which measured the fragments and the molecular ions of the two compounds separated on the silver nanorods surface. Rhodamine 6G has been preconcentrated as 1.5 mm radial from the sampling point while 4-aminothiophenol formed a continuous self-assembled monolayer on the silver nanorods surface with a maximum molecular ion intensity at a distance of 0.5 mm from the sampling point. The separation of the single chemical components from the two-component mixture over the examined silver nanostructured films could clearly be shown. A fast separation on the mentioned nanotextured films was observed (within 50 s). This procedure can be easily integrated into the micro/nanofluidic systems or chips and different detection systems can be applied.
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Zarei M, Goharshadi EK, Ahmadzadeh H, Samiee S. Improvement of heat dissipation in agarose gel electrophoresis by metal oxide nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra19678g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Joule heating is a primary limitation in slab gel electrophoresis which is a gold standard method in biochemistry and biotechnology.
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Affiliation(s)
- Mohammad Zarei
- Department of Chemistry
- Ferdowsi University of Mashhad
- Mashhad 91779
- Iran
| | - Elaheh K. Goharshadi
- Department of Chemistry
- Ferdowsi University of Mashhad
- Mashhad 91779
- Iran
- Center of Nano Research
| | | | - Sara Samiee
- Department of Chemistry
- Ferdowsi University of Mashhad
- Mashhad 91779
- Iran
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Use of chemical auxiliaries to control p450 enzymes for predictable oxidations at unactivated C-h bonds of substrates. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 851:209-28. [PMID: 26002737 DOI: 10.1007/978-3-319-16009-2_8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cytochrome P450 enzymes (P450s) have the ability to oxidize unactivated C-H bonds of substrates with remarkable regio- and stereoselectivity. Comparable selectivity for chemical oxidizing agents is typically difficult to achieve. Hence, there is an interest in exploiting P450s as potential biocatalysts. Despite their impressive attributes, the current use of P450s as biocatalysts is limited. While bacterial P450 enzymes typically show higher activity, they tend to be highly selective for one or a few substrates. On the other hand, mammalian P450s, especially the drug-metabolizing enzymes, display astonishing substrate promiscuity. However, product prediction continues to be challenging. This review discusses the use of small molecules for controlling P450 substrate specificity and product selectivity. The focus will be on two approaches in the area: (1) the use of decoy molecules, and (2) the application of substrate engineering to control oxidation by the enzyme.
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Whitcombe MJ, Kirsch N, Nicholls IA. Molecular imprinting science and technology: a survey of the literature for the years 2004-2011. J Mol Recognit 2014; 27:297-401. [PMID: 24700625 DOI: 10.1002/jmr.2347] [Citation(s) in RCA: 275] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/28/2013] [Accepted: 12/01/2013] [Indexed: 12/11/2022]
Abstract
Herein, we present a survey of the literature covering the development of molecular imprinting science and technology over the years 2004-2011. In total, 3779 references to the original papers, reviews, edited volumes and monographs from this period are included, along with recently identified uncited materials from prior to 2004, which were omitted in the first instalment of this series covering the years 1930-2003. In the presentation of the assembled references, a section presenting reviews and monographs covering the area is followed by sections describing fundamental aspects of molecular imprinting including the development of novel polymer formats. Thereafter, literature describing efforts to apply these polymeric materials to a range of application areas is presented. Current trends and areas of rapid development are discussed.
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Polic V, Auclair K. Controlling substrate specificity and product regio- and stereo-selectivities of P450 enzymes without mutagenesis. Bioorg Med Chem 2014; 22:5547-54. [PMID: 25035263 PMCID: PMC5177023 DOI: 10.1016/j.bmc.2014.06.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 06/12/2014] [Accepted: 06/17/2014] [Indexed: 01/25/2023]
Abstract
P450 enzymes (P450s) are well known for their ability to oxidize unactivated CH bonds with high regio- and stereoselectivity. Hence, there is emerging interest in exploiting P450s as potential biocatalysts. Although bacterial P450s typically show higher activity than their mammalian counterparts, they tend to be more substrate selective. Most drug-metabolizing P450s on the other hand, display remarkable substrate promiscuity, yet product prediction remains challenging. Protein engineering is one established strategy to overcome these issues. A less explored, yet promising alternative involves substrate engineering. This review discusses the use of small molecules for controlling the substrate specificity and product selectivity of P450s. The focus is on two approaches, one taking advantage of non-covalent decoy molecules, and the other involving covalent substrate modifications.
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Affiliation(s)
- Vanja Polic
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Karine Auclair
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada.
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10
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Chung M, Kim D, Herr AE. Polymer sieving matrices in microanalytical electrophoresis. Analyst 2014; 139:5635-54. [DOI: 10.1039/c4an01179a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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11
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Bissonnette L, Bergeron MG. Next revolution in the molecular theranostics of infectious diseases: microfabricated systems for personalized medicine. Expert Rev Mol Diagn 2014; 6:433-50. [PMID: 16706745 DOI: 10.1586/14737159.6.3.433] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The molecular diagnosis of infectious diseases is currently going through a revolution sustained by the regulatory approval of amplification tests that have been shown to be equivalent or superior to existing gold standard methods. The recent approval of a microarray system for the pharmacogenomic profiling of cytochrome P450-mediated drug metabolism is paving the way to novel, rapid, sensitive, robust and economical microfabricated systems for point-of-care diagnostics, which are utilized closer and closer to the patient's bedside. These systems will enable the multiparametric genetic evaluation of several medical conditions, including infectious diseases. This forecoming revolution will position molecular theranostics in a broader integrated view of personalized medicine, which exploits genetic information from microbes and human hosts to optimize patient management and disease treatment.
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Affiliation(s)
- Luc Bissonnette
- Département de Biologie Médicale (Microbiologie), Faculté de Médecine, Université Laval, Québec City, Canada.
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12
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Wang Y, Ouyang J, Baeyens WRG, Delanghe JR. Use of nanomaterials in capillary and microchip electrophoresis. Expert Rev Proteomics 2014; 4:287-98. [PMID: 17425463 DOI: 10.1586/14789450.4.2.287] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This review gives an overview of different separation strategies with nanomaterials and their use in capillary electrophoresis (CE) and capillary electrochromatography, as well as in microchip electrophoresis, including metal and metal oxide nanoparticles, carbon nanotubes, fullerene and polymer nanoparticles, as well as silica nanoparticles. The paper highlights the new developments and innovative applications of nanoparticles as pseudostationary phases or immobilized on the capillary surface for CE separation. The separation and characterization of target nanoparticles with different sizes by CE are reviewed likewise.
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Affiliation(s)
- Yanqing Wang
- Beijing Normal University, College of Chemistry, Beijing Normal University, Beijing, P. R. China.
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13
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Kim JY, Kim HB, Jang DJ. Electrophoretic separation of gold nanoparticles according to bifunctional molecules-induced charge and size. Electrophoresis 2013; 34:911-6. [DOI: 10.1002/elps.201200492] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 11/19/2012] [Accepted: 11/19/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Jong-Yeob Kim
- School of Chemistry; Seoul National University; Seoul; Korea
| | - Hyung-Bae Kim
- School of Chemistry; Seoul National University; Seoul; Korea
| | - Du-Jeon Jang
- School of Chemistry; Seoul National University; Seoul; Korea
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14
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Li L, Yu H, Liu D, You T. A novel dark-field microscopy technique coupled with capillary electrophoresis for visual analysis of single nanoparticles. Analyst 2013; 138:3705-10. [DOI: 10.1039/c3an00408b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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15
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Mikšík I, Lacinová K, Zmatlíková Z, Sedláková P, Král V, Sýkora D, Řezanka P, Kašička V. Open-tubular capillary electrochromatography with bare gold nanoparticles-based stationary phase applied to separation of trypsin digested native and glycated proteins. J Sep Sci 2012; 35:994-1002. [DOI: 10.1002/jssc.201101049] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ivan Mikšík
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Kateřina Lacinová
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Zdeňka Zmatlíková
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague Czech Republic
- Department of Analytical Chemistry; Faculty of Chemical Technology; University of Pardubice; Pardubice Czech Republic
| | - Pavla Sedláková
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Vladimír Král
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague Czech Republic
| | - David Sýkora
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague Czech Republic
| | - Pavel Řezanka
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Prague Czech Republic
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16
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Mikšík I, Lacinová K, Zmatlíková Z, Sedláková P, Král V, Sýkora D, Řezanka P, Kašička V. Open-tubular capillary electrochromatography with bare gold nanoparticles-based stationary phase applied to separation of trypsin digested native and glycated proteins. J Sep Sci 2012. [DOI: 10.1002/jssc.2727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ivan Mikšík
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague; Czech Republic
| | - Kateřina Lacinová
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague; Czech Republic
| | | | - Pavla Sedláková
- Institute of Physiology; Academy of Sciences of the Czech Republic; Prague; Czech Republic
| | - Vladimír Král
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague; Czech Republic
| | - David Sýkora
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague; Czech Republic
| | - Pavel Řezanka
- Department of Analytical Chemistry; Institute of Chemical Technology; Prague; Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Prague; Czech Republic
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Hamer M, Yone A, Rezzano I. Gold nanoparticle‐coated capillaries for protein and peptide analysis on open‐tubular capillary electrochromatography. Electrophoresis 2012; 33:334-9. [DOI: 10.1002/elps.201100297] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mariana Hamer
- Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires – IQUIFIB, CONICET, Buenos Aires, Argentina
| | - Angel Yone
- Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires – IQUIFIB, CONICET, Buenos Aires, Argentina
| | - Irene Rezzano
- Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires – IQUIFIB, CONICET, Buenos Aires, Argentina
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18
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Advincula RC. Engineering molecularly imprinted polymer (MIP) materials: Developments and challenges for sensing and separation technologies. KOREAN J CHEM ENG 2011. [DOI: 10.1007/s11814-011-0133-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu CS, Liu FK, Ko FH. Potential role of gold nanoparticles for improved analytical methods: an introduction to characterizations and applications. Anal Bioanal Chem 2010; 399:103-18. [DOI: 10.1007/s00216-010-4094-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 08/01/2010] [Accepted: 08/03/2010] [Indexed: 01/13/2023]
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Sýkora D, Kašička V, Mikšík I, Řezanka P, Záruba K, Matějka P, Král V. Application of gold nanoparticles in separation sciences. J Sep Sci 2010; 33:372-87. [DOI: 10.1002/jssc.200900677] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Wang W, Zhang S, Liu C, Lu L, Wang S, Zhang X. CE immunoassay with enhanced chemiluminescence detection of erythropoietin using silica dioxide nanoparticles as pseudostationary phase. Electrophoresis 2009; 30:3092-3098. [DOI: 10.1002/elps.200800616] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Vasilev K, Casanal A, Challougui H, Griesser HJ. Template-assisted generation of nanocavities within plasma polymer films. J Phys Chem B 2009; 113:7059-63. [PMID: 19438274 DOI: 10.1021/jp807986k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The generation of nanosized cavities within thin film layers is of interest for a number of fundamental and applied reasons. One challenge is to make such systems sufficiently robust mechanically. Plasma polymer (pp) films possess excellent mechanical stability if deposition conditions are selected such as to achieve a sufficient density of cross-linking and resistance to extraction of polymeric material by solvents. In this study, gold nanoparticles of 15 and 70 nm diameter were used as sacrificial templates to generate nanocavities in pp films of various thickness values in the tens of nanometers range. A first pp layer was deposited onto substrates using n-heptylamine (HA) to a thickness of 20 nm. Carboxy-thiolated gold nanoparticles were electrostatically bound onto the surface amine groups of the n-heptylamine plasma polymer (HApp) layer. A second HApp layer was then coated to various thicknesses onto the nanoparticle/HApp surface. The template particles embedded thus in-between the two HApp layers were then dissolved using aqueous KCN solution; monitoring of the plasmon resonance band of the gold nanoparticles enabled verification of template stripping and measurement of the kinetics of stripping. AFM topography images showed little change on extraction of the template nanoparticles, indicating that the plasma polymer layer maintained structural integrity upon template extraction and subsequent drying, and thereby prevented collapse of the empty nanocavities. The concept of template stripping to generate controlled size free volume in thin plasma polymer layers is thus shown to produce robust structures.
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Affiliation(s)
- Krasimir Vasilev
- Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095, Adelaide, Australia.
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24
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Review: Micro- and nanosized molecularly imprinted polymers for high-throughput analytical applications. Anal Chim Acta 2009; 641:7-13. [DOI: 10.1016/j.aca.2009.03.035] [Citation(s) in RCA: 204] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2009] [Revised: 03/17/2009] [Accepted: 03/18/2009] [Indexed: 11/23/2022]
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25
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Moliner-Martínez Y, Cárdenas S, Simonet BM, Valcárcel M. Recent developments in capillary EKC based on carbon nanoparticles. Electrophoresis 2009; 30:169-75. [DOI: 10.1002/elps.200800314] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Moliner-Martínez Y, Barrios M, Cárdenas S, Valcárcel M. Comparative study of carbon nanotubes and C60 fullerenes as pseudostationary phases in electrokinetic chromatography. J Chromatogr A 2008; 1194:128-33. [DOI: 10.1016/j.chroma.2008.04.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Revised: 04/08/2008] [Accepted: 04/16/2008] [Indexed: 11/26/2022]
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Abstract
This paper investigated the potential use of silica nanoparticles (SNPs) as pseudostationary phase (PSP) for protein separation. The wall adsorption of SNPs as well as the influences of SNPs and poly(ethylene oxide) (PEO) were studied. The SNPs showed selectivity toward the proteins, and the concentration ratio of SNPs to PEO influenced the separation. The proteins that could not be baseline-resolved under conventional CZE mode were separated in a buffer consisting of 30 mM phosphoric acid, 0.05% PEO, and 0.05% SNPs at pH 2.37, with detection limits ranging from 2 to 45.5 ppm. The intraday and interday RSDs of the migration times were in the ranges of 2.1-2.8% (n = 5) and 2.5-3.4% (three days, n = 3 x 5 = 15), respectively.
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Affiliation(s)
- Weidong Qin
- College of Chemistry, Beijing Normal University, Beijing, PR China.
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Morales-Cid G, Simonet BM, Cárdenas S, Valcárcel M. On-capillary sample cleanup method for the electrophoretic determination of carbohydrates in juice samples. Electrophoresis 2007; 28:1557-63. [PMID: 17447235 DOI: 10.1002/elps.200600518] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
On many occasions, sample treatment is a critical step in electrophoretic analysis. As an alternative to batch procedures, in this work, a new strategy is presented with a view to develop an on-capillary sample cleanup method. This strategy is based on the partial filling of the capillary with carboxylated single-walled carbon nanotube (c-SWNT). The nanoparticles retain interferences from the matrix allowing the determination and quantification of carbohydrates (viz glucose, maltose and fructose). The precision of the method for the analysis of real samples ranged from 5.3 to 6.4%. The proposed method was compared with a method based on a batch filtration of the juice sample through diatomaceous earth and further electrophoretic determination. This method was also validated in this work. The RSD for this other method ranged from 5.1 to 6%. The results obtained by both methods were statistically comparable demonstrating the accuracy of the proposed methods and their effectiveness. Electrophoretic separation of carbohydrates was achieved using 200 mM borate solution as a buffer at pH 9.5 and applying 15 kV. During separation, the capillary temperature was kept constant at 40 degrees C. For the on-capillary cleanup method, a solution containing 50 mg/L of c-SWNTs prepared in 300 mM borate solution at pH 9.5 was introduced for 60 s into the capillary just before sample introduction. For the electrophoretic analysis of samples cleaned in batch with diatomaceous earth, it is also recommended to introduce into the capillary, just before the sample, a 300 mM borate solution as it enhances the sensitivity and electrophoretic resolution.
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Affiliation(s)
- Gabriel Morales-Cid
- Department of Analytical Chemistry, Marie Curie Building, Campus de Rabanales, University of Cordoba, Cordoba, Spain
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Liu BF, Xu B, Zhang G, Du W, Luo Q. Micro-separation toward systems biology. J Chromatogr A 2005; 1106:19-28. [PMID: 16236294 DOI: 10.1016/j.chroma.2005.09.066] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Revised: 09/14/2005] [Accepted: 09/21/2005] [Indexed: 10/25/2022]
Abstract
Current biology is experiencing transformation in logic or philosophy that forces us to reevaluate the concept of cell, tissue or entire organism as a collection of individual components. Systems biology that aims at understanding biological system at the systems level is an emerging research area, which involves interdisciplinary collaborations of life sciences, computational and mathematical sciences, systems engineering, and analytical technology, etc. For analytical chemistry, developing innovative methods to meet the requirement of systems biology represents new challenges as also opportunities and responsibility. In this review, systems biology-oriented micro-separation technologies are introduced for comprehensive profiling of genome, proteome and metabolome, characterization of biomolecules interaction and single cell analysis such as capillary electrophoresis, ultra-thin layer gel electrophoresis, micro-column liquid chromatography, and their multidimensional combinations, parallel integrations, microfabricated formats, and nano technology involvement. Future challenges and directions are also suggested.
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Affiliation(s)
- Bi-Feng Liu
- The Key Laboratory of Biomedical Photonics of MOE - Hubei Bioinformatics, Department of Systems Biology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
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Li W, Fries D, Malik A. Negatively charged sol-gel column with stable electroosmotic flow for online preconcentration of zwitterionic biomolecules in capillary electromigration separations. J Sep Sci 2005; 28:2153-64. [PMID: 16318212 DOI: 10.1002/jssc.200500172] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A negatively charged sol-gel coating was developed for on-line preconcentration of zwitterionic biomolecules in capillary electrophoresis (CE), using asparagine and myoglobin as representative zwitterionic bioanalytes. The sol-gel coating was created by using a solution containing three precursors: mercaptopropyltrimethoxysilane (MPTMS), tetramethoxysilane (TMOS), and n-octadecyltriethoxysilane (C18-TEOS). The resulting sol-gel coating contained chemically bonded mercaptopropyl functional groups that were further oxidized by hydrogen peroxide to the corresponding sulfonic acid moieties. Such a surface-bonded sol-gel coating can carry a negative charge over a wide range of pH due to the presence of deprotonated sulfonic acid groups. Under favorable pH conditions, the negatively charged sol-gel coating can facilitate the extraction of positively charged analytes from a zwitterionic sample through electrostatic interaction. This principle was employed to extract myoglobin and asparagine by passing aqueous samples of these zwitterionic analytes through a negatively charged sol-gel column. The extracted analytes were then desorbed and focused via local pH change and stacking. The local pH change was accomplished by passing a buffer solution with a pH above the solute p/ value, while a dynamic pH junction between the sample solution and the background electrolyte was utilized to facilitate solute focusing. The sorption/desorption phenomena could, perhaps, also be explained on the basis of ion-exchange and local pH junction effects. On-line preconcentration and analysis results obtained on sulfonated sol-gel columns were compared with those obtained on an uncoated fused silica capillary of identical dimensions using conventional sample injections. Using UV detection, the presented sample preconcentration technique provided a sensitivity enhancement factor (SEF) on the order of 3 x 10(3) for myoglobin, and 7 x 10(3) for asparagine.
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Affiliation(s)
- Wen Li
- Department of Chemistry, University of South Florida, Tampa, FL 33620, USA
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