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Barrios CA, Canalejas-Tejero V. Micro-Shaping of Nanopatterned Surfaces by Electron Beam Irradiation. MICROMACHINES 2016; 7:E66. [PMID: 30407439 PMCID: PMC6190039 DOI: 10.3390/mi7040066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 03/30/2016] [Accepted: 04/08/2016] [Indexed: 06/08/2023]
Abstract
We show that planar nanopatterned thin films on standard polycarbonate (PC) compact discs (CD) can be micro-shaped in a non-contact manner via direct e-beam exposure. The shape of the film can be controlled by proper selection of the e-beam parameters. As an example of application, we demonstrate a two-dimensional (2D) array of micro-lenses/reservoirs conformally covered by an Al 2D nanohole array (NHA) film on a PC CD substrate. It is also shown that such a curvilinear Al NHA layer can be easily transferred onto a flexible polymeric support. The presented technique provides a new tool for creating lab-on-CD architectures and developing multifunctional (flexible) non-planar nanostructured films and surfaces.
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Affiliation(s)
- Carlos Angulo Barrios
- Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
- Department of Photonics and Bioengineering, ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
| | - Víctor Canalejas-Tejero
- Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
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Higashi K, Miki N. Toad's egg-like cultivation process for forming microcarriers from nanofibrous hydrogel. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:5900-3. [PMID: 26737634 DOI: 10.1109/embc.2015.7319734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This paper proposes a new method for generating microcarries from bacterial cellulose (BC). BC, which is produced by specific bacteria, is a hydrogel composed of a three dimensional network structure formed by cellulose nanofibers. BC as an ECM-like nanofibrous material exhibits an excellent environment for cellular adhesion. Moreover, BC has a high biocompatibility and mechanical strength. From these properties, BC is expected to be applied for microcarriers, which is used for cultivating anchorage-dependent cells. Then, we developed a microfabrication process to create BC microcarriers by using gelatin microspheres as sacrificial architectures. In addition, the monodispersity of the formed BC microcarreirs was investigated.
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Pereira MM, Raposo NRB, Brayner R, Teixeira EM, Oliveira V, Quintão CCR, Camargo LSA, Mattoso LHC, Brandão HM. Cytotoxicity and expression of genes involved in the cellular stress response and apoptosis in mammalian fibroblast exposed to cotton cellulose nanofibers. NANOTECHNOLOGY 2013; 24:075103. [PMID: 23358497 DOI: 10.1088/0957-4484/24/7/075103] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Cellulose nanofibers (CNF) have mechanical properties that make them very attractive for applications in the construction of polymeric matrices, drug delivery and tissue engineering. However, little is known about their impact on mammalian cells. The objective of this study was to evaluate the cytotoxicity of CNF and their effect on gene expression of fibroblasts cultured in vitro. The morphology of CNF was analyzed by transmission electron microscopy and the surface charge by Zeta potential. Cell viability was analyzed by flow cytometry assay and gene expression of biomarkers focused on cell stress response such as Heat shock protein 70.1 (HSP70.1) and Peroxiredoxin 1 (PRDX1) and apoptosis as B-cell leukemia (BCL-2) and BCL-2 associated X protein (BAX) by RT-PCR assay. Low concentrations of CNF (0.02-100 μg ml(-1)) did not cause cell death; however, at concentrations above 200 μg ml(-1), the nanofibers significantly decreased cell viability (86.41 ± 5.37%). The exposure to high concentrations of CNF (2000 and 5000 μg ml(-1)) resulted in increased HSP70.1, PRDX1 and BAX gene expression. The current study concludes that, under the conditions tested, high concentrations (2000 and 5000 μg ml(-1)) of CNF cause decreased cell viability and affect the expression of stress- and apoptosis-associated molecular markers.
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Affiliation(s)
- M M Pereira
- Nucleus of Analytical Identification and Quantification (NIQUA), Department of Pharmaceutical Sciences, Pharmacy Faculty, Federal University of Juiz de Fora, Juiz de Fora, Brazil.
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Yu HZ, Li Y, Ou LML. Reading disc-based bioassays with standard computer drives. Acc Chem Res 2013; 46:258-68. [PMID: 23025412 DOI: 10.1021/ar300104b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Traditional methods of disease diagnosis are both time-consuming and labor-intensive, and many tests require expensive instrumentation and trained professionals, which restricts their use to biomedical laboratories. Because patients can wait several days (even weeks) for the results, the consequences of delayed treatment could be disastrous. Therefore, affordable and simple point-of-care (POC) biosensor devices could fill a diagnostic niche in the clinic or even at home, as personal glucose meters do for diabetics. These devices would allow patients to check their own health conditions and enable physicians to make prompt treatment decisions, which could improve the chances for rapid recovery and cure. Compact discs (CDs) provide inexpensive substrate materials for the preparation of microarray biochips, and conventional computer drives/disc players can be adapted as precise optical reading devices for signal processing. Researchers can employ the polycarbonate (PC) base of a CD as an alternative substrate to glass slides or silicon wafers for the preparation of microanalytical devices. Using the characteristic optical phenomena occurring on the metal layer of a CD, researchers can develop biosensors based on advanced spectroscopic readout (interferometry or surface plasmon resonance). If researchers integrate microfluidic functions with CD mechanics, they can control fluid transfer through the spinning motion of the disc, leading to "lab-on-a-CD" devices. Over the last decade, our laboratory has focused on the construction of POC biosensor devices from off-the-shelf CDs or DVDs and standard computer drives. Besides the initial studies of the suitability of CDs for surface and materials chemistry research (fabrication of self-assembled monolayers and oxide nanostructures), we have demonstrated that an ordinary optical drive, without modification of either the hardware or the software driver, can function as the signal transducing element for reading disc-based bioassays quantitatively. In this Account, we first provide a brief introduction to CD-related materials chemistry and microfluidics research. Then we describe the mild chemistry developed in our laboratory for the preparation of computer-readable biomolecular screening assays: photochemical activation of the polycarbonate (PC) disc surface and immobilization and delivery of probe and target biomolecules. We thoroughly discuss the analysis of the molecular recognition events: researchers can "read" these devices quantitatively with an unmodified optical drive of any personal computer. Finally, and critically, we illustrate our digitized molecular diagnosis approach with three trial systems: DNA hybridization, antibody-antigen binding, and ultrasensitive lead detection with a DNAzyme assay. These examples demonstrate the broad potential of this new analytical/diagnostic tool for medical screening, on-site food/water safety testing, and remote environmental monitoring.
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Affiliation(s)
- Hua-Zhong Yu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Yunchao Li
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Department of Chemistry, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Lily M.-L. Ou
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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Cui G, Li Y, Shi T, Gao Z, Qiu N, Satoh T, Kakuchi T, Duan Q. Synthesis and characterization of Eu(III) complexes of modified cellulose and poly(N-isopropylacrylamide). Carbohydr Polym 2013; 94:77-81. [PMID: 23544512 DOI: 10.1016/j.carbpol.2013.01.045] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 01/16/2013] [Accepted: 01/18/2013] [Indexed: 11/16/2022]
Abstract
A series of thermo-responsive copolymers of poly(N-isopropylacrylamide) (PNIPAM) and cellulose were synthesized via atom transfer radical polymerization (ATRP) using N-isopropylacrylamide as the monomer, cellulose acetate as the initiator, and CuCl/tris(2-dimethylaminoethyl)amine (Me6TREN) as a catalytic system. The resulting polymers had a narrow range of polydispersity indexes 1.27-1.37, and molecular weights of 8600-17,300 g mol(-1). Novel functional complexes of cellulose-g-PNIPAM/Eu(III) with excellent thermosensitive and fluorescent properties were then formed by the chelation of copolymers and europium(III) ions. The maximum emission intensity of the complexes at 613 nm was enhanced by a factor of approximately 10 relative to that of the corresponding Eu(III) complexes. Additionally, the lower critical solution temperatures (LCSTs) of cellulose-g-PNIPAM/Eu(III) were slightly greater than those of the copolymers.
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Affiliation(s)
- Guihua Cui
- Department of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China
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Baba Y. Nanobiodevices for Genome Analysis, Proteome Analysis, and Biomedical Applications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20100341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Wang W, Zhang TJ, Zhang DW, Li HY, Ma YR, Qi LM, Zhou YL, Zhang XX. Amperometric hydrogen peroxide biosensor based on the immobilization of heme proteins on gold nanoparticles–bacteria cellulose nanofibers nanocomposite. Talanta 2011; 84:71-7. [DOI: 10.1016/j.talanta.2010.12.015] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 12/02/2010] [Accepted: 12/08/2010] [Indexed: 11/16/2022]
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Oshima T, Taguchi S, Ohe K, Baba Y. Phosphorylated bacterial cellulose for adsorption of proteins. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.09.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tabuchi M, Seo M, Inoue T, Ikeda T, Kogure A, Inoue I, Katayama S, Matsunaga T, Hara A, Komoda T. Geometrical Separation Method for Lipoproteins Using Bioformulated-Fiber Matrix Electrophoresis: Size of High-Density Lipoprotein Does Not Reflect Its Density. Anal Chem 2010; 83:1131-6. [DOI: 10.1021/ac102402c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mari Tabuchi
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
- Research Information Center for Extremophile, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Makoto Seo
- Department of Biochemistry, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama 350-0495, Japan
| | - Takayuki Inoue
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Takeshi Ikeda
- Department of Chemistry, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Akinori Kogure
- Surface Analysis Division, Shimadzu Analytical & Measuring Center, Inc. 380-1, Horiyamashita, Hadano-city, Kanagawa, 259-1304, Japan
| | - Ikuo Inoue
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama 350-0495, Japan
| | - Shigehiro Katayama
- Department of Endocrinology and Diabetes, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama 350-0495, Japan
| | - Toshiyuki Matsunaga
- Laboratory of Biochemistry, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan
| | - Akira Hara
- Laboratory of Biochemistry, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, Gifu 502-8585, Japan
| | - Tsugikazu Komoda
- Department of Biochemistry, Faculty of Medicine, Saitama Medical University, 38 Morohongo, Moroyama, Iruma-gun, Saitama 350-0495, Japan
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Li ZQ, Zhou XD, Pei CH. Synthesis of PLA-co-PGMA Copolymer and its Application in the Surface Modification of Bacterial Cellulose. INT J POLYM MATER PO 2010. [DOI: 10.1080/00914037.2010.483214] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kaji N, Okamoto Y, Tokeshi M, Baba Y. Nanopillar, nanoball, and nanofibers for highly efficient analysis of biomolecules. Chem Soc Rev 2010; 39:948-56. [DOI: 10.1039/b900410f] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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NIIDE T, SHIRAKI H, OSHIMA T, BABA Y, KAMIYA N, GOTO M. Quaternary Ammonium Bacterial Cellulose for Adsorption of Proteins. SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN 2010. [DOI: 10.15261/serdj.17.73] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Teppei NIIDE
- Department of Applied Chemistry, Kyushu University
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