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Schabikowski M, Kowalczyk P, Karczmarska A, Gawdzik B, Wypych A, Kramkowski K, Wrzosek K, Laskowski Ł. Aluminium(III) Oxide-The Silent Killer of Bacteria. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28010401. [PMID: 36615599 PMCID: PMC9822385 DOI: 10.3390/molecules28010401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/23/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023]
Abstract
In this article, we describe the antimicrobial properties of pristine anodised aluminium oxide matrices-the material many consider biologically inert. During a typical anodisation process, chromium and chlorine compounds are used for electropolishing and the removal of the first-step aluminium oxide. Matrices without the use of those harmful compounds were also fabricated and tested for comparison. The antibacterial tests were conducted on four strains of Escherichia coli: K12, R2, R3 and R4. The properties of the matrices were also compared to the three types of antibiotics: ciprofloxacin, bleomycin and cloxacillin using the Minimal Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) tests. Moreover, DNA was isolated from the analysed bacteria which was additionally digested with formamidopyrimidine-DNA glycosylase (Fpg) protein from the group of repair glycosases. These enzymes are markers of modified oxidised bases in nucleic acids produced during oxidative stress in cells. Preliminary cellular studies, MIC and MBC tests and digestion with Fpg protein after modification of bacterial DNA suggest that these compounds may have greater potential as antibacterial agents than the aforementioned antibiotics. The described composites are highly specific for the analysed model Escherichia coli strains and may be used in the future as new substitutes for commonly used antibiotics in clinical and nosocomial infections in the progressing pandemic era. The results show much stronger antibacterial properties of the functionalised membranes on the action of bacterial membranes in comparison to the antibiotics in the Fpg digestion experiment. This is most likely due to the strong induction of oxidative stress in the cell through the breakdown of the analysed bacterial DNA.
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Affiliation(s)
- Mateusz Schabikowski
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Kraków, Poland
- Correspondence: (M.S.); (P.K.)
| | - Paweł Kowalczyk
- Department of Animal Nutrition, The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jabłonna, Poland
- Correspondence: (M.S.); (P.K.)
| | | | - Barbara Gawdzik
- Institute of Chemistry, Jan Kochanowski University, 25-406 Kielce, Poland
| | - Aleksandra Wypych
- Centre for Modern Interdisciplinary Technologies, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Karol Kramkowski
- Department of Physical Chemistry, Medical University of Bialystok, 15-089 Białystok, Poland
| | - Karol Wrzosek
- Department of Heart Diseases, The Medical Center of Postgraduate Education, 01-813 Warszawa, Poland
| | - Łukasz Laskowski
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Kraków, Poland
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Nanoporous Membranes for the Filtration of Proteins from Biological Fluids: Biocompatibility Tests on Cell Cultures and Suggested Applications for the Treatment of Alzheimer's Disease. J Clin Med 2022; 11:jcm11195846. [PMID: 36233713 PMCID: PMC9571538 DOI: 10.3390/jcm11195846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/15/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Alzheimer's disease has a significant epidemiological and socioeconomic impact, and, unfortunately, the extensive research focused on potential curative therapies has not yet proven to be successful. However, in recent years, important steps have been made in the development and functionalization of nanoporous alumina membranes, which might be of great interest for medical use, including the treatment of neurodegenerative diseases. In this context, the aim of this article is to present the synthesis and biocompatibility testing of a special filtrating nano-membrane, which is planned to be used in an experimental device for Alzheimer's disease treatment. METHODS Firstly, the alumina nanoporous membrane was synthesized via the two-step anodizing process in oxalic acid-based electrolytes and functionalized via the atomic layer deposition technique. Subsequently, quality control tests (spectrophotometry and potential measurements), toxicity, and biocompatibility tests (cell viability assays) were conducted. RESULTS The proposed alumina nanoporous membrane proved to be efficient for amyloid-beta filtration according to the permeability studies conducted for 72 h. The proposed membrane has proven to be fully compatible with the tested cell cultures. CONCLUSIONS The proposed alumina nanoporous membrane model is safe and could be incorporated into implantable devices for further in vivo experiments and might be an efficient therapeutic approach for Alzheimer's disease.
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Ajalli N, Pourmadadi M, Yazdian F, Rashedi H, Navaei-Nigjeh M, Díez-Pascual AM. Chitosan/Gamma-Alumina/Fe3O4@5-FU Nanostructures as Promising Nanocarriers: Physiochemical Characterization and Toxicity Activity. Molecules 2022; 27:molecules27175369. [PMID: 36080138 PMCID: PMC9458215 DOI: 10.3390/molecules27175369] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/15/2022] [Accepted: 08/16/2022] [Indexed: 01/07/2023] Open
Abstract
Today, cancer treatment is an important issue in the medical world due to the challenges and side effects of ongoing treatment procedures. Current methods can be replaced with targeted nano-drug delivery systems to overcome such side effects. In the present work, an intelligent nano-system consisting of Chitosan (Ch)/Gamma alumina (γAl)/Fe3O4 and 5-Fluorouracil (5-FU) was synthesized and designed for the first time in order to influence the Michigan Cancer Foundation-7 (MCF-7) cell line in the treatment of breast cancer. Physico-chemical characterization of the nanocarriers was carried out using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), dynamic light scattering (DLS), and scanning electron microscopy (SEM). SEM analysis revealed smooth and homogeneous spherical nanoparticles. The high stability of the nanoparticles and their narrow size distribution was confirmed by DLS. The results of the loading study demonstrated that these nano-systems cause controlled, stable, and pH-sensitive release in cancerous environments with an inactive targeting mechanism. Finally, the results of MTT and flow cytometry tests indicated that this nano-system increased the rate of apoptosis induction on cancerous masses and could be an effective alternative to current treatments.
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Affiliation(s)
- Narges Ajalli
- Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran 1417935840, Iran
| | - Mehrab Pourmadadi
- Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran 1417935840, Iran
| | - Fatemeh Yazdian
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran 1439956191, Iran
- Correspondence: (F.Y.); (H.R.); (A.M.D.-P.)
| | - Hamid Rashedi
- Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran 1417935840, Iran
- Correspondence: (F.Y.); (H.R.); (A.M.D.-P.)
| | - Mona Navaei-Nigjeh
- Pharmaceutical Sciences Research Center, Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran 1417613151, Iran
- Department of Pharmaceutical Biomaterials, Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran
| | - Ana M. Díez-Pascual
- Universidad de Alcalá, Facultad de Ciencias, Departamento de Química Analítica, Química Física e Ingeniería Química, Ctra. Madrid-Barcelona, Km. 33.6, 28805 Alcalá de Henares, Madrid, Spain
- Correspondence: (F.Y.); (H.R.); (A.M.D.-P.)
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Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces. NANOMATERIALS 2021; 11:nano11092271. [PMID: 34578587 PMCID: PMC8468298 DOI: 10.3390/nano11092271] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/21/2021] [Accepted: 08/27/2021] [Indexed: 12/22/2022]
Abstract
Over the past few years, researchers have made numerous breakthroughs in the field of aluminum anodizing and faced the problem of the lack of adequate theoretical models for the interpretation of some new experimental findings. For instance, spontaneously formed anodic alumina nanofibers and petal-like patterns, flower-like structures observed under AC anodizing conditions, and hierarchical pores whose diameters range from several nanometers to sub-millimeters could be explained neither by the classical field-assisted dissolution theory nor by the plastic flow model. In addition, difficulties arose in explaining the basic indicators of porous film growth, such as the nonlinear current–voltage characteristics of electrochemical cells or the evolution of hexagonal pore patterns at the early stages of anodizing experiments. Such a conceptual crisis resulted in new multidisciplinary investigations and the development of novel theoretical models, whose evolution is discussed at length in this review work. The particular focus of this paper is on the recently developed electroconvection-based theories that allowed making truly remarkable advances in understanding the porous anodic alumina formation process in the last 15 years. Some explanation of the synergy between electrode reactions and transport processes leading to self-organization is provided. Finally, future prospects for the synthesis of novel anodic architectures are discussed.
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5
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Ok S, Vayer M, Sinturel C. A decade of innovation and progress in understanding the morphology and structure of heterogeneous polymers in rigid confinement. SOFT MATTER 2021; 17:7430-7458. [PMID: 34341814 DOI: 10.1039/d1sm00522g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
When confined in nanoscale domains, polymers generally encounter changes in their structural, thermodynamics and dynamics properties compared to those in the bulk, due to the high amount of polymer/wall interfaces and limited amount of matter. The present review specifically deals with the confinement of heterogeneous polymers (i.e. polymer blends and block copolymers) in rigid nanoscale domains (i.e. bearing non-deformable solid walls) where the processes of phase separation and self-assembly can be deeply affected. This review focuses on the innovative contributions of the last decade (2010-2020), giving a summary of the new insights and understanding gained in this period. We conclude this review by giving our view on the most thriving directions for this topic.
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Affiliation(s)
- Salim Ok
- Petroleum Research Center, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat, 13109, Kuwait.
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6
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Yang L, Pijuan-Galito S, Rho HS, Vasilevich AS, Eren AD, Ge L, Habibović P, Alexander MR, de Boer J, Carlier A, van Rijn P, Zhou Q. High-Throughput Methods in the Discovery and Study of Biomaterials and Materiobiology. Chem Rev 2021; 121:4561-4677. [PMID: 33705116 PMCID: PMC8154331 DOI: 10.1021/acs.chemrev.0c00752] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Indexed: 02/07/2023]
Abstract
The complex interaction of cells with biomaterials (i.e., materiobiology) plays an increasingly pivotal role in the development of novel implants, biomedical devices, and tissue engineering scaffolds to treat diseases, aid in the restoration of bodily functions, construct healthy tissues, or regenerate diseased ones. However, the conventional approaches are incapable of screening the huge amount of potential material parameter combinations to identify the optimal cell responses and involve a combination of serendipity and many series of trial-and-error experiments. For advanced tissue engineering and regenerative medicine, highly efficient and complex bioanalysis platforms are expected to explore the complex interaction of cells with biomaterials using combinatorial approaches that offer desired complex microenvironments during healing, development, and homeostasis. In this review, we first introduce materiobiology and its high-throughput screening (HTS). Then we present an in-depth of the recent progress of 2D/3D HTS platforms (i.e., gradient and microarray) in the principle, preparation, screening for materiobiology, and combination with other advanced technologies. The Compendium for Biomaterial Transcriptomics and high content imaging, computational simulations, and their translation toward commercial and clinical uses are highlighted. In the final section, current challenges and future perspectives are discussed. High-throughput experimentation within the field of materiobiology enables the elucidation of the relationships between biomaterial properties and biological behavior and thereby serves as a potential tool for accelerating the development of high-performance biomaterials.
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Affiliation(s)
- Liangliang Yang
- University
of Groningen, W. J. Kolff Institute for Biomedical Engineering and
Materials Science, Department of Biomedical Engineering, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Sara Pijuan-Galito
- School
of Pharmacy, Biodiscovery Institute, University
of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Hoon Suk Rho
- Department
of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired
Regenerative Medicine, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Aliaksei S. Vasilevich
- Department
of Biomedical Engineering, Eindhoven University
of Technology, 5600 MB Eindhoven, The Netherlands
| | - Aysegul Dede Eren
- Department
of Biomedical Engineering, Eindhoven University
of Technology, 5600 MB Eindhoven, The Netherlands
| | - Lu Ge
- University
of Groningen, W. J. Kolff Institute for Biomedical Engineering and
Materials Science, Department of Biomedical Engineering, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Pamela Habibović
- Department
of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired
Regenerative Medicine, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Morgan R. Alexander
- School
of Pharmacy, Boots Science Building, University
of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Jan de Boer
- Department
of Biomedical Engineering, Eindhoven University
of Technology, 5600 MB Eindhoven, The Netherlands
| | - Aurélie Carlier
- Department
of Cell Biology-Inspired Tissue Engineering, MERLN Institute for Technology-Inspired
Regenerative Medicine, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Patrick van Rijn
- University
of Groningen, W. J. Kolff Institute for Biomedical Engineering and
Materials Science, Department of Biomedical Engineering, University Medical Center Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Qihui Zhou
- Institute
for Translational Medicine, Department of Stomatology, The Affiliated
Hospital of Qingdao University, Qingdao
University, Qingdao 266003, China
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7
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Nobles KP, Janorkar AV, Williamson RS. Surface modifications to enhance osseointegration-Resulting material properties and biological responses. J Biomed Mater Res B Appl Biomater 2021; 109:1909-1923. [PMID: 33871951 DOI: 10.1002/jbm.b.34835] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 02/26/2021] [Accepted: 03/14/2021] [Indexed: 12/18/2022]
Abstract
As life expectancy and the age of the general population increases so does the need for improved implants. A major contributor to the failure of implants is poor osseointegration, which is typically described as the direct connection between bone and implant. This leads to unnecessary complications and an increased burden on the patient population. Modification of the implant surfaces through novel techniques, such as varying topography and/or applying coatings, has become a popular method to enhance the osseointegration capability of implants. Recent research has shown that particular surface features influence how bone cells interact with a material; however, it is unknown which exact features achieve optimal bone integration. In this review, current methods of modifying surfaces will be highlighted, and the resulting surface characteristics and biological responses are discussed. Review of the current strategies of surface modifications found that many coating types are more advantageous when used in combination; however, finding a surface modification that utilizes the mutual beneficial effects of important surface characteristics while still maintaining commercial viability is where future challenges exist.
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Affiliation(s)
- Kadie P Nobles
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Amol V Janorkar
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Randall S Williamson
- Department of Biomedical Materials Science, School of Dentistry, University of Mississippi Medical Center, Jackson, Mississippi, USA
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8
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Bera R, Priyadarshini A, Ong PJ, Hong L. Strategy to Chemically Decorate Nanopores of a Carbon Membrane for Filtrating Polyphenolics from Ethanol. ACS APPLIED MATERIALS & INTERFACES 2021; 13:10524-10536. [PMID: 33605145 DOI: 10.1021/acsami.0c17977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study invents a post-pyrolysis modification approach to render the resulting carbon membrane (CM) competent for organic solvent nanofiltration (OSN). A bitumen coating on a porous stainless-steel disk (PSD) serves as the precursor for the intended carbon membrane (CM), which is attained through pyrolysis in Ar. The bitumen coating casts dual-pore networks in the CM because of the dominant asphaltene constituent in bitumen. The subsequent chemical decoration of CM was pursued through the following protocol: dopamine (DA) was deployed in the nanopores of CM via pressurized infiltration and followed by Tris buffer passes through to trigger in situ conversion of DA to polydopamine (PDA), which was affixed over the pore walls to furnish chemical affinity (termed as CMPDA). Additionally, the catechol moiety of PDA was arranged to chelate with the Zn2+ ion, aiming to trim the -OH anchor (termed as CMPDA-Zn) to probe the effect of chelate on separation. The three membranes (CM, CMPDA, and CMPDA-Zn) were thereafter assessed by the separation of ethanol or isopropanol from phenolics [tannic acid (TA)/tetracycline (TC)]. A significantly improved OSN performance [rejection (%) ↔ permeance (L/(m2·h·bar))] of CM vs CMPDA was observed: (i) for TA feed, 13% ↔ 85 L/(m2·h·bar) vs 83% ↔ 12 L/(m2·h·bar); and (ii) for TC feed, 20% ↔ 78 L/(m2·h·bar) vs 78% ↔ 12 L/(m2·h·bar). Compared to CMPDA, CMPDA-Zn further advances the rejection performance (∼89% for TA and ∼80% for TC) over 50 h separation. They are benchmarked by the latest literature results. The performance enhancements can be attributed to the spreading of PDA or PDA-Zn sites in the dual-pore networks, so that they are able to offer H-bonding and steric blocking roles, a chemicomechanical effect, to seize solute molecules over pore walls. It is this interfacial drag effect that sustains the solute rejection.
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Affiliation(s)
- Ranadip Bera
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
| | - Antara Priyadarshini
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
| | - Pin Jin Ong
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
| | - Liang Hong
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore
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9
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Davoodi E, Zhianmanesh M, Montazerian H, Milani AS, Hoorfar M. Nano-porous anodic alumina: fundamentals and applications in tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:60. [PMID: 32642974 DOI: 10.1007/s10856-020-06398-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
Recently, nanomaterials have been widely utilized in tissue engineering applications due to their unique properties such as the high surface to volume ratio and diversity of morphology and structure. However, most methods used for the fabrication of nanomaterials are rather complicated and costly. Among different nanomaterials, anodic aluminum oxide (AAO) is a great example of nanoporous structures that can easily be engineered by changing the electrolyte type, anodizing potential, current density, temperature, acid concentration and anodizing time. Nanoporous anodic alumina has often been used for mammalian cell culture, biofunctionalization, drug delivery, and biosensing by coating its surface with biocompatible materials. Despite its wide application in tissue engineering, thorough in vivo and in vitro studies of AAO are still required to enhance its biocompatibility and thereby pave the way for its application in tissue replacements. Recognizing this gap, this review article aims to highlight the biomedical potentials of AAO for applications in tissue replacements along with the mechanism of porous structure formation and pore characteristics in terms of fabrication parameters.
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Affiliation(s)
- Elham Davoodi
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
| | - Masoud Zhianmanesh
- Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Shabanloo Street, Tehran, 16788, Iran
| | - Hossein Montazerian
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Abbas S Milani
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Mina Hoorfar
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada.
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10
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Ashraf MW, Manzoor S, Shahzad Sarfraz M, Wasim MF, Ali B, Akhlaq M, Rujita C, Popa A. Fabrication and fuzzy analysis of AAO membrane with manipulated pore diameter for applications in biotechnology. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2020. [DOI: 10.3233/jifs-179673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | - Saher Manzoor
- Department of Physics (Electronics), GC University, Lahore, Pakistan
| | - Muhammad Shahzad Sarfraz
- Department of Computer Science, National University of Computer and Emerging Sciences, Islamabad, Chiniot-Faisalabad Campus, Pakistan
| | | | - Basit Ali
- Department of Physics (Electronics), GC University, Lahore, Pakistan
| | - Maham Akhlaq
- Department of Physics (Electronics), GC University, Lahore, Pakistan
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11
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Lenhart B, Wei X, Zhang Z, Wang X, Wang Q, Liu C. Nanopore Fabrication and Application as Biosensors in Neurodegenerative Diseases. Crit Rev Biomed Eng 2020; 48:29-62. [PMID: 32749118 PMCID: PMC8020784 DOI: 10.1615/critrevbiomedeng.2020033151] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Since its conception as an applied biomedical technology nearly 30 years ago, nanopore is emerging as a promising, high-throughput, biomarker-targeted diagnostic tool for clinicians. The attraction of a nanopore-based detection system is its simple, inexpensive, robust, user-friendly, high-throughput blueprint with minimal sample preparation needed prior to analysis. The goal of clinical-based nanopore biosensing is to go from sample acquisition to a meaningful readout quickly. The most extensive work in nanopore applications has been targeted at DNA, RNA, and peptide identification. Although, biosensing of pathological biomarkers, which is covered in this review, is on the rise. This review is broken into two major sections: (i) the current state of existing biological, solid state, and hybrid nanopore systems and (ii) the applications of nanopore biosensors toward detecting neurodegenerative biomarkers.
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Affiliation(s)
- Brian Lenhart
- Department of Chemical Engineering, University of South Carolina, Columbia, SC
| | - Xiaojun Wei
- Department of Chemical Engineering, University of South Carolina, Columbia, SC
- Biomedical Engineering Program, University of South Carolina, Columbia, SC
| | - Zehui Zhang
- Biomedical Engineering Program, University of South Carolina, Columbia, SC
| | - Xiaoqin Wang
- Department of Chemical Engineering, University of South Carolina, Columbia, SC
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC
| | - Chang Liu
- Department of Chemical Engineering, University of South Carolina, Columbia, SC
- Biomedical Engineering Program, University of South Carolina, Columbia, SC
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12
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Wang G, Wan Y, Liu Z. Construction of Complex Structures Containing Micro-Pits and Nano-Pits on the Surface of Titanium for Cytocompatibility Improvement. MATERIALS 2019; 12:ma12172820. [PMID: 31480689 PMCID: PMC6747959 DOI: 10.3390/ma12172820] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/21/2019] [Accepted: 08/27/2019] [Indexed: 12/15/2022]
Abstract
The surface topography of medical implants plays an important role in the regulation of cellular responses. Microstructure and nanostructure surfaces have been proved to enhance cell spreading and proliferation with respect to smooth surfaces. In this study, we fabricated a new structure including micro-pits and nano-pits on the surface of titanium via sandblasting, acid etching and chemical oxidation to investigate the influence of composite structures on cell behavior. Meanwhile, the surface properties and corrosion resistance of treated samples were also tested. The micro/nanostructured titanium surface comprising of micro-pits and nano-pits presented enhanced roughness and hydrophilicity. In addition, the corrosion resistance of the titanium substrate with micro-pits and nano-pits was significantly improved compared to that of polished titanium. More importantly, the micro/nanostructured titanium surface proved a good interfacial environment to promote osteoblast functions such as cell adhesion and spreading. Taken together, these results showed that the construction of micro/nanostructure on the titanium surface is an effective modification strategy to improve osteoblast cell responses.
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Affiliation(s)
- Guisen Wang
- Key Laboratory of High Efficiency and Clean Manufacturing, School of Mechanical Engineering, Shandong University, Jinan 250061, China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, China
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
- Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control, Tsinghua University, Beijing 100084, China
| | - Yi Wan
- Key Laboratory of High Efficiency and Clean Manufacturing, School of Mechanical Engineering, Shandong University, Jinan 250061, China.
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, China.
| | - Zhanqiang Liu
- Key Laboratory of High Efficiency and Clean Manufacturing, School of Mechanical Engineering, Shandong University, Jinan 250061, China
- National Demonstration Center for Experimental Mechanical Engineering Education, Shandong University, Jinan 250061, China
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13
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Affiliation(s)
- Asima Naz
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
- Department of Chemistry, Mirpur University of Science & Technology (MUST), Mirpur, Azad Jammu & Kashmir, Pakistan
| | - Rabia Sattar
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
- Department of Chemistry, The University of Lahore, Sargodha, Pakistan
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
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14
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Synthesis and Morphological Characterization of Nanoporous Aluminum Oxide Films by Using a Single Anodization Step. COATINGS 2019. [DOI: 10.3390/coatings9020115] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nanoporous anodic aluminum oxide (AAO) films play an important role in nanotechnology due to their easily adjustable morphological properties and wide range of applications. Thus, a deep and systematic characterization of the morphological properties of these coatings is essential. The most important variables in the synthesis of nanoporous AAO films include the anodization voltage, nature, concentration and temperature of the electrolyte, which, combined, result in pores of different sizes and geometries. In the present work, AA 1050 alloy was used to synthesize AAO films, using 0.3 and 0.9 M oxalic acid as the electrolyte and combining different electrolyte temperatures (20, 30 and 40 °C) and anodizing voltages (30, 40 and 60 V), with the aim to correlate the morphological properties of the coatings with the synthesis parameters of a single anodization step. The coatings obtained were characterized by optical microscopy and scanning electron microscopy, determining pore diameter, interpore distance, pore density and coating thickness. The results showed that, by varying the anodic synthesis conditions, it is possible to obtain coatings with a pore diameter between 21 and 97 nm, an interpore distance between 59 and 138 nm, pore density between 2.8 × 1010 and 5.4 × 109 pores/cm2 and thicknesses between 15 and 145 µm. In this way, the right combination of synthesis variables allows synthesizing AAO coatings with morphological characteristics best suited to each particular application.
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15
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Influence of ALD Coating Layers on the Optical Properties of Nanoporous Alumina-Based Structures. COATINGS 2019. [DOI: 10.3390/coatings9010043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Optical changes associated with the surface coating of different metal oxides and nanolayers by the ALD technique of a nanoporous alumina structure (NPAS) obtained by the two-step anodization method were analyzed. The NPASs were coated with: (i) a single layer (SiO2 or TiO2), and (ii) a double layer of SiO2 plus Al2O3 or aluminum doped ZnO (AZO) to estimate the effect of surface layer coverage material, geometrical parameters (pore-size/porosity), and number of layers on light transmission/reflection. Chemical surface characterization of the different NPASs was carried out by analyzing XPS spectra, which allowed us to obtain an estimation of the coating layer homogeneity. Transmittance and spectroscopic ellipsometry measurements were analyzed in order to detect changes in characteristic optical parameters such as band gap, refractive index, and extinction coefficients associated with the material and the characteristics of the single or double coating layers.
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16
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Yildirim D, Baran E, Ates S, Yazici B, Tukel SS. Improvement of activity and stability of Rhizomucor miehei lipase by immobilization on nanoporous aluminium oxide and potassium sulfate microcrystals and their applications in the synthesis of aroma esters. BIOCATAL BIOTRANSFOR 2018. [DOI: 10.1080/10242422.2018.1530766] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Deniz Yildirim
- Vocational School of Ceyhan, University of Cukurova, Adana, Turkey
| | - Evrim Baran
- Faculty of Engineering and Architecture, Department of Mechanical Engineering, University of Kilis 7 Aralık, Kilis, Turkey
- Advanced Technology Application and Research Center (ATARC), University of Kilis 7 Aralık, Kilis, Turkey
| | - Sevgi Ates
- Faculty of Sciences and Letters, Department of Chemistry, University of Cukurova, Adana, Turkey
| | - Birgul Yazici
- Faculty of Sciences and Letters, Department of Chemistry, University of Cukurova, Adana, Turkey
| | - S. Seyhan Tukel
- Faculty of Sciences and Letters, Department of Chemistry, University of Cukurova, Adana, Turkey
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17
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Nanobiostructure of fibrous-like alumina functionalized with an analog of the BP100 peptide: Synthesis, characterization and biological applications. Colloids Surf B Biointerfaces 2018; 163:275-283. [DOI: 10.1016/j.colsurfb.2018.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/11/2017] [Accepted: 01/02/2018] [Indexed: 12/17/2022]
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18
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Zhang L, Chen L, Liu SX, Gong J, Tang Q, Su ZM. Honeycomb-patterned hybrid films of surfactant-encapsulated polyoxometalates by a breath figure method and its electrocatalysis for BrO3−. Dalton Trans 2018; 47:105-111. [DOI: 10.1039/c7dt03201c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surfactant-encapsulated POMs can self-assemble into ordered porous honeycomb films under a moist atmosphere. We successfully fabricated (DODA)10{Cu4(PW9)2} honeycomb films by using a one-step method.
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Affiliation(s)
- Li Zhang
- School of the Environment
- Northeast Normal University
- Changchun 130024
- P. R. China
- College of Food Engineering
| | - Lei Chen
- School of the Environment
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Shu-xia Liu
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- Northeast Normal University
- Changchun
- P. R. China
| | - Jian Gong
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- Northeast Normal University
- Changchun
- P. R. China
| | - Qun Tang
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- Northeast Normal University
- Changchun
- P. R. China
| | - Zhong-min Su
- Key Laboratory of Polyoxometalates Science of Ministry of Education
- Northeast Normal University
- Changchun
- P. R. China
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19
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Zhang W, Huang G, Ng K, Ji Y, Gao B, Huang L, Zhou J, Lu TJ, Xu F. Engineering ellipsoidal cap-like hydrogel particles as building blocks or sacrificial templates for three-dimensional cell culture. Biomater Sci 2018; 6:885-892. [DOI: 10.1039/c7bm01186e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
AAO template-assisted fabrication of ellipsoidal cap-like hydrogel particles as building blocks or sacrificial templates for 3D cell culture.
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Affiliation(s)
- Weiwei Zhang
- Non-equilibrium Condensed Matter and Quantum Engineering Laboratory
- The Key Laboratory of Ministry of Education
- School of Science
- Xi'an Jiaotong University
- Xi'an 710049
| | - Guoyou Huang
- Bioinspired Engineering and Biomechanics Center (BEBC)
- MOE Key Laboratory of Biomedical Information Engineering, School of Life Science and Technology, Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Kelvin Ng
- Bioinspired Engineering and Biomechanics Center (BEBC)
- MOE Key Laboratory of Biomedical Information Engineering, School of Life Science and Technology, Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
- Department of Biomedical Engineering
| | - Yuan Ji
- Bioinspired Engineering and Biomechanics Center (BEBC)
- MOE Key Laboratory of Biomedical Information Engineering, School of Life Science and Technology, Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Bin Gao
- Department of Endocrinology and Metabolism
- Xijing Hospital
- Fourth Military Medical University
- Xi'an 710054
- P.R. China
| | - Liqing Huang
- Non-equilibrium Condensed Matter and Quantum Engineering Laboratory
- The Key Laboratory of Ministry of Education
- School of Science
- Xi'an Jiaotong University
- Xi'an 710049
| | - Jinxiong Zhou
- State Key Laboratory for Strength and Vibration of Mechanical Structures
- School of Aerospace
- Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
| | - Tian Jian Lu
- Bioinspired Engineering and Biomechanics Center (BEBC)
- MOE Key Laboratory of Biomedical Information Engineering, School of Life Science and Technology, Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
- MOE Key Laboratory for Multifunctional Materials and Structures
| | - Feng Xu
- Bioinspired Engineering and Biomechanics Center (BEBC)
- MOE Key Laboratory of Biomedical Information Engineering, School of Life Science and Technology, Xi'an Jiaotong University
- Xi'an 710049
- P. R. China
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20
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Effect of Airborne Particle Abrasion on Microtensile Bond Strength of Total-Etch Adhesives to Human Dentin. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2432536. [PMID: 29392128 PMCID: PMC5748107 DOI: 10.1155/2017/2432536] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/08/2017] [Accepted: 11/21/2017] [Indexed: 12/13/2022]
Abstract
Aim of this study was to investigate a specific airborne particle abrasion pretreatment on dentin and its effects on microtensile bond strengths of four commercial total-etch adhesives. Midcoronal occlusal dentin of extracted human molars was used. Teeth were randomly assigned to 4 groups according to the adhesive system used: OptiBond FL (FL), OptiBond Solo Plus (SO), Prime & Bond (PB), and Riva Bond LC (RB). Specimens from each group were further divided into two subgroups: control specimens were treated with adhesive procedures; abraded specimens were pretreated with airborne particle abrasion using 50 μm Al2O3 before adhesion. After bonding procedures, composite crowns were incrementally built up. Specimens were sectioned perpendicular to adhesive interface to produce multiple beams, which were tested under tension until failure. Data were statistically analysed. Failure mode analysis was performed. Overall comparison showed significant increase in bond strength (p < 0.001) between abraded and no-abraded specimens, independently of brand. Intrabrand comparison showed statistical increase when abraded specimens were tested compared to no-abraded ones, with the exception of PB that did not show such difference. Distribution of failure mode was relatively uniform among all subgroups. Surface treatment by airborne particle abrasion with Al2O3 particles can increase the bond strength of total-etch adhesives.
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21
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Mireles M, Gaborski TR. Fabrication techniques enabling ultrathin nanostructured membranes for separations. Electrophoresis 2017; 38:2374-2388. [PMID: 28524241 PMCID: PMC5909070 DOI: 10.1002/elps.201700114] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/01/2017] [Accepted: 05/11/2017] [Indexed: 11/09/2022]
Abstract
The fabrication of nanostructured materials is an area of continuous improvement and innovative techniques that fulfill the demand of many fields of research and development. The continuously decreasing size of the smallest patternable feature has expanded the catalog of methods enabling the fabrication of nanostructured materials. Several of these nanofabrication techniques have sprouted from applications requiring nanoporous membranes such as molecular separations, cell culture, and plasmonics. This review summarizes methods that successfully produce through-pores in ultrathin films exhibiting an approximate pore size to thickness ratio of one, which has been shown to be beneficial due to high permeability and improved separation potential. The material reviewed includes large-area, parallel, and affordable approaches such as self-organizing polymers, nanosphere lithography, anodization, nanoimprint lithography as well as others such as solid phase crystallization and nanosphere lens lithography. The aim of this review is to provide a set of inexpensive fabrication techniques to produce nanostructured materials exhibiting pores ranging from 10 to 350 nm and a pore size to thickness ratio close to one. The fabrication methods described in this work have reported the successful manufacture of nanoporous membranes exhibiting the ideal characteristics to improve selectivity and permeability when applied as separation media in ultrafiltration.
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Affiliation(s)
- Marcela Mireles
- Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
| | - Thomas R Gaborski
- Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
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22
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Catón L, Yurkov A, Giesbers M, Dijksterhuis J, Ingham CJ. Physically Triggered Morphology Changes in a Novel Acremonium Isolate Cultivated in Precisely Engineered Microfabricated Environments. Front Microbiol 2017; 8:1269. [PMID: 28769882 PMCID: PMC5509762 DOI: 10.3389/fmicb.2017.01269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/23/2017] [Indexed: 01/06/2023] Open
Abstract
Fungi are strongly affected by their physical environment. Microfabrication offers the possibility of creating new culture environments and ecosystems with defined characteristics. Here, we report the isolation of a novel member of the fungal genus Acremonium using a microengineered cultivation chip. This isolate was unusual in that it organizes into macroscopic structures when initially cultivated within microwells with a porous aluminum oxide (PAO) base. These “templated mycelial bundles” (TMB) were formed from masses of parallel hyphae with side branching suppressed. TMB were highly hydrated, facilitating the passive movement of solutes along the bundle. By using a range of culture chips, it was deduced that the critical factors in triggering the TMB were growth in microwells from 50 to 300 μm in diameter with a PAO base. Cultivation experiments, using spores and pigments as tracking agents, indicate that bulk growth of the TMB occurs at the base. TMB morphology is highly coherent and is maintained after growing out of the microwells. TMB can explore their environment by developing unbundled lateral hyphae; TMB only followed if nutrients were available. Because of the ease of fabricating numerous microstructures, we suggest this is a productive approach for exploring morphology and growth in multicellular microorganisms and microbial communities.
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Affiliation(s)
| | - Andrey Yurkov
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbHBraunschweig, Germany
| | - Marcel Giesbers
- Wageningen Electron Microscopy Centre, Wageningen University Plant SciencesWageningen, Netherlands
| | - Jan Dijksterhuis
- Westerdijk Fungal Biodiversity Centre-KNAW Fungal Biodiversity CentreUtrecht, Netherlands
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23
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Wang L, Boutilier MSH, Kidambi PR, Jang D, Hadjiconstantinou NG, Karnik R. Fundamental transport mechanisms, fabrication and potential applications of nanoporous atomically thin membranes. NATURE NANOTECHNOLOGY 2017; 12:509-522. [PMID: 28584292 DOI: 10.1038/nnano.2017.72] [Citation(s) in RCA: 370] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 03/20/2017] [Indexed: 05/22/2023]
Abstract
Graphene and other two-dimensional materials offer a new approach to controlling mass transport at the nanoscale. These materials can sustain nanoscale pores in their rigid lattices and due to their minimum possible material thickness, high mechanical strength and chemical robustness, they could be used to address persistent challenges in membrane separations. Here we discuss theoretical and experimental developments in the emerging field of nanoporous atomically thin membranes, focusing on the fundamental mechanisms of gas- and liquid-phase transport, membrane fabrication techniques and advances towards practical application. We highlight potential functional characteristics of the membranes and discuss applications where they are expected to offer advantages. Finally, we outline the major scientific questions and technological challenges that need to be addressed to bridge the gap from theoretical simulations and proof-of-concept experiments to real-world applications.
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Affiliation(s)
- Luda Wang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Michael S H Boutilier
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Piran R Kidambi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Doojoon Jang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Nicolas G Hadjiconstantinou
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Rohit Karnik
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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24
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Abstract
We report on the fabrication of sub-micro and nanostructured steel mold inserts for the replication of nanostructured immunoassay biochips. Planar and microstructured stainless steel inserts were textured at the sub-micron and nanoscale by combining nanosphere lithography and electrochemical etching. This allowed the fabrication of structures with lateral dimensions of hundreds of nanometers and aspect ratios of up to 1:2. Nanostructured plastic parts were produced by means of hot embossing and injection molding. Surface nanostructuring was used to control wettability and increase the sensitivity of an immunoassay.
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25
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Bassani I, Kougias PG, Angelidaki I. In-situ biogas upgrading in thermophilic granular UASB reactor: key factors affecting the hydrogen mass transfer rate. BIORESOURCE TECHNOLOGY 2016; 221:485-491. [PMID: 27677151 DOI: 10.1016/j.biortech.2016.09.083] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 09/12/2016] [Accepted: 09/17/2016] [Indexed: 05/07/2023]
Abstract
Biological biogas upgrading coupling CO2 with external H2 to form biomethane opens new avenues for sustainable biofuel production. For developing this technology, efficient H2 to liquid transfer is fundamental. This study proposes an innovative setup for in-situ biogas upgrading converting the CO2 in the biogas into CH4, via hydrogenotrophic methanogenesis. The setup consisted of a granular reactor connected to a separate chamber, where H2 was injected. Different packing materials (rashig rings and alumina ceramic sponge) were tested to increase gas-liquid mass transfer. This aspect was optimized by liquid and gas recirculation and chamber configuration. It was shown that by distributing H2 through a metallic diffuser followed by ceramic sponge in a separate chamber, having a volume of 25% of the reactor, and by applying a mild gas recirculation, CO2 content in the biogas dropped from 42 to 10% and the final biogas was upgraded from 58 to 82% CH4 content.
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Affiliation(s)
- Ilaria Bassani
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Panagiotis G Kougias
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark.
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
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26
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Altuntas S, Buyukserin F, Haider A, Altinok B, Biyikli N, Aslim B. Protein-releasing conductive anodized alumina membranes for nerve-interface materials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:590-598. [DOI: 10.1016/j.msec.2016.05.084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/20/2016] [Accepted: 05/18/2016] [Indexed: 12/26/2022]
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Abstract
Cell-cell fusion is fundamental to a multitude of biological processes ranging from cell differentiation and embryogenesis to cancer metastasis and biomaterial-tissue interactions. Fusogenic cells are exposed to biochemical and biophysical factors, which could potentially alter cell behavior. While biochemical inducers of fusion such as cytokines and kinases have been identified, little is known about the biophysical regulation of cell-cell fusion. Here, we designed experiments to examine cell-cell fusion using bulk metallic glass (BMG) nanorod arrays with varying biophysical cues, i.e. nanotopography and stiffness. Through independent variation of stiffness and topography, we found that nanotopography constitutes the primary biophysical cue that can override biochemical signals to attenuate fusion. Specifically, nanotopography restricts cytoskeletal remodeling-associated signaling, which leads to reduced fusion. This finding expands our fundamental understanding of the nanoscale biophysical regulation of cell fusion and can be exploited in biomaterials design to induce desirable biomaterial-tissue interactions.
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28
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Liao J, Ling Z, Li Y, Hu X. The Role of Stress in the Self-Organized Growth of Porous Anodic Alumina. ACS APPLIED MATERIALS & INTERFACES 2016; 8:8017-8023. [PMID: 26983725 DOI: 10.1021/acsami.6b00703] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ridges and depressions were formed on the barrier layer during chemical and physical etching of porous anodic alumina (PAA) from the bottom side, indicating nonuniform etching rate around each cell. These behaviors cannot be explained solely by the well-known composition variation, but were in line with the hexagonal distribution of stress within the barrier layer of each cell. Such stress variation should be attributed to the interactions of neighboring cells undergoing volume expansion. These interactions could account for the self-organization of PAA.
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Affiliation(s)
- Jinfu Liao
- Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Zhiyuan Ling
- Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Yi Li
- Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - Xing Hu
- Department of Electronic Materials Science and Engineering, South China University of Technology , Guangzhou 510640, P. R. China
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29
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Piri S, Piri F, Rajabi B, Ebrahimi S, Zamani A, Yaftian MR. In situOne-pot Electrochemical Synthesis of Aluminum Oxide/polyaniline Nanocomposite; Characterization and Its Adsorption Properties towards Some Heavy Metal Ions. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201500230] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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30
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Bragazzi NL, Gasparini R, Amicizia D, Panatto D, Larosa C. Porous Alumina as a Promising Biomaterial for Public Health. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2015; 101:213-29. [PMID: 26572980 DOI: 10.1016/bs.apcsb.2015.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Porous aluminum is a nanostructured material characterized by unique properties, such as chemical stability, regular uniformity, dense hexagonal porous lattice with high aspect ratio nanopores, excellent mechanical strength, and biocompatibility. This overview examines how the structure and properties of porous alumina can be exploited in the field of public health. Porous alumina can be employed for fabricating membranes and filters for bioremediation, water ultrafiltration, and microfiltration/nanofiltration, being a promising technique for having clean and fresh water, which is essential for human health. Porous alumina-based nanobiosensor coated with specific antibodies or peptides seem to be a useful tool to detect and remove pathogens both in food and in water, as well as for environmental monitoring. Further, these applications, being low-energy demanding and cost-effective, are particularly valuable in resource-limited settings and contexts, and can be employed as point of use devices in developing countries, where there is an urgent need of hygiene and safety assurance.
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Affiliation(s)
- Nicola Luigi Bragazzi
- Department of Health Sciences (DISSAL), Via Antonio Pastore 1, University of Genoa, Genoa, Italy
| | - Roberto Gasparini
- Department of Health Sciences (DISSAL), Via Antonio Pastore 1, University of Genoa, Genoa, Italy.
| | - Daniela Amicizia
- Department of Health Sciences (DISSAL), Via Antonio Pastore 1, University of Genoa, Genoa, Italy
| | - Donatella Panatto
- Department of Health Sciences (DISSAL), Via Antonio Pastore 1, University of Genoa, Genoa, Italy
| | - Claudio Larosa
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
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31
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Debrassi A, Roeven E, Thijssen S, Scheres L, de Vos WM, Wennekes T, Zuilhof H. Versatile (bio)functionalization of bromo-terminated phosphonate-modified porous aluminum oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:5633-5644. [PMID: 25919333 DOI: 10.1021/acs.langmuir.5b00853] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Porous aluminum oxide (PAO) is a nanoporous material used for various (bio)technological applications, and tailoring its surface properties via covalent modification is a way to expand and refine its application. Specific and complex chemical modification of the PAO surface requires a stepwise approach in which a secondary reaction on a stable initial modification is necessary to achieve the desired terminal molecular architecture and reactivity. We here show that the straightforward initial modification of the bare PAO surface with bromo-terminated phosphonic acid allows for the subsequent preparation of PAO with a wide scope of terminal reactive groups, making it suitable for (bio)functionalization. Starting from the initial bromo-terminated PAO, we prepared PAO surfaces presenting various terminal functional groups, such as azide, alkyne, alkene, thiol, isothiocyanate, and N-hydroxysuccinimide (NHS). We also show that this wide scope of easily accessible tailored reactive PAO surfaces can be used for subsequent modification with (bio)molecules, including carbohydrate derivatives and fluorescently labeled proteins.
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Affiliation(s)
- Aline Debrassi
- †Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Esther Roeven
- ‡Surfix BV, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Selina Thijssen
- †Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Luc Scheres
- ‡Surfix BV, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Willem M de Vos
- §Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB Wageningen, The Netherlands
| | - Tom Wennekes
- †Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Han Zuilhof
- †Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
- ⊥Department of Chemical and Materials Engineering, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
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32
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Yagur-Kroll S, Schreuder E, Ingham CJ, Heideman R, Rosen R, Belkin S. A miniature porous aluminum oxide-based flow-cell for online water quality monitoring using bacterial sensor cells. Biosens Bioelectron 2015; 64:625-32. [DOI: 10.1016/j.bios.2014.09.076] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/23/2014] [Accepted: 09/25/2014] [Indexed: 10/24/2022]
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33
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Drozdov AS, Volodina KV, Vinogradov VV, Vinogradov VV. Biocomposites for wound-healing based on sol–gel magnetite. RSC Adv 2015. [DOI: 10.1039/c5ra16177k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
New nanocomposite material based on sol–gel magnetite for wound healing is described. Composition and drug release profile provides 1.5 fold acceleration wound healing rate and 2 fold lesser scar size.
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Affiliation(s)
- Andrey S. Drozdov
- Laboratory of Solution Chemistry of Advanced Materials and Technologies
- ITMO University
- St. Petersburg
- Russian Federation
| | - Katerina V. Volodina
- Laboratory of Solution Chemistry of Advanced Materials and Technologies
- ITMO University
- St. Petersburg
- Russian Federation
| | - Vasiliy V. Vinogradov
- Laboratory of Solution Chemistry of Advanced Materials and Technologies
- ITMO University
- St. Petersburg
- Russian Federation
| | - Vladimir V. Vinogradov
- Laboratory of Solution Chemistry of Advanced Materials and Technologies
- ITMO University
- St. Petersburg
- Russian Federation
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Prikulis J, Tamulevičius T, Poplausks R, Bergs G, Apsite I, Malinovskis U, Actins A, Erts D. Optical properties of thin metal films with nanohole arrays on porous alumina–aluminum structures. RSC Adv 2015. [DOI: 10.1039/c5ra12880c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Enhanced plasmonic attenuation of reflection is observed in a gold–alumina–aluminum multilayer system near the interferometric anti-reflection condition.
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Affiliation(s)
- Juris Prikulis
- Institute of Chemical Physics
- University of Latvia
- Riga LV-1586
- Latvia
| | | | | | - Gatis Bergs
- Institute of Chemical Physics
- University of Latvia
- Riga LV-1586
- Latvia
| | - Indra Apsite
- Institute of Chemical Physics
- University of Latvia
- Riga LV-1586
- Latvia
| | | | | | - Donats Erts
- Institute of Chemical Physics
- University of Latvia
- Riga LV-1586
- Latvia
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36
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Nanoporous Anodic Alumina for Drug Delivery and Biomedical Applications. NANOPOROUS ALUMINA 2015. [DOI: 10.1007/978-3-319-20334-8_11] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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37
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Hernández-Eguía LP, Ferré-Borrull J, Macias G, Pallarès J, Marsal LF. Engineering optical properties of gold-coated nanoporous anodic alumina for biosensing. NANOSCALE RESEARCH LETTERS 2014; 9:414. [PMID: 25177224 PMCID: PMC4146444 DOI: 10.1186/1556-276x-9-414] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 07/08/2014] [Indexed: 05/25/2023]
Abstract
The effect in the Fabry-Pérot optical interferences of nanoporous anodic alumina films coated with gold is studied as a function of the porosity and of the gold thickness by means of reflectance spectroscopy. Samples with porosities between 14 and 70% and gold thicknesses (10 and 20 nm) were considered. The sputtering of gold on the nanoporous anodic alumina (NAA) films results in an increase of the fringe intensity of the oscillations in the spectra resulting from Fabry-Pérot interferences in the porous layer, with a reduction in the maximum reflectance in the UV-visible region. For the thicker gold layer, sharp valleys appear in the near-infrared (IR) range that can be useful for accurate spectral shift measurements in optical biosensing. A theoretical model for the optical behavior has also been proposed. The model shows a very good agreement with the experimental measurements, what makes it useful for design and optimization of devices based on this material. This material capability is enormous for using it as an accurate and sensitive optical sensor, since gold owns a well-known surface chemistry with certain molecules, most of them biomolecules.
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Affiliation(s)
- Laura P Hernández-Eguía
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, Tarragona 43007, Spain
| | - Josep Ferré-Borrull
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, Tarragona 43007, Spain
| | - Gerard Macias
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, Tarragona 43007, Spain
| | - Josep Pallarès
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, Tarragona 43007, Spain
| | - Lluís F Marsal
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, Tarragona 43007, Spain
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38
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Lin SP, Huang SY, Chen SF, Vinzons LU, Ciou JY, Wong PJ. Investigation of the interfacial effects of small chemical-modified TiO2 nanotubes on 3T3 fibroblast responses. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12071-12082. [PMID: 25012464 DOI: 10.1021/am503323y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In order to gain insight into how interfacial effects influence cell responses, chemically modified anodized TiO2 nanotubes (ATNs) were used to simultaneously investigate the effects of nanoscale substrate structure and angstrom-scale chemicals on cell morphological change and cell growth. Two small chemicals were used to modify the ATNs, namely, 3-aminopropyltrimethoxysilane (APTMS) and 3-mercaptopropyltrimethoxysilane (MPTMS), resulting in APTMS-modified ATNs (APTMS-ATNs) and MPTMS-modified ATNs (MPTMS-ATNs), respectively. In our in vitro observation of NIH/3T3 fibroblasts, cells thrived on both unmodified and modified ATNs. Quantitative analyses of cell numbers exhibited that APTMS-ATNs effectively facilitated cell proliferation and directed cell orientation owing to full cell-substrate contact caused by positively charged amino groups (-NH3(+)) on the surface. In addition, scanning electron microscopy and fluorescence images showed different cell morphologies on APTMS-ATNs and MPTMS-ATNs. APTMS-ATNs resulted in flat spreading of fibroblasts, while MPTMS-ATNs resulted in fibroblasts with a three-dimensional solid shape and clear contours. The results indicate that the synergistic effects of nanotube surface topology and small chemical modification and, to a lesser extent, surface hydrophilicity, alter the interfacial interactions between cells and substrates, significantly affecting cell morphology, attachment, and growth. Using ATNs with different interfacial effects from various small chemicals, orientation of cells into various patterns can be achieved and investigation of cell fates, such as proliferation or stem cell differentiation, can be performed for future advanced medical or biological applications.
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Affiliation(s)
- Shu-Ping Lin
- Graduate Institute of Biomedical Engineering, §Bachelor Program of Biotechnology, National Chung Hsing University , 250 Kuo-Kuang Road, Taichung, 40227 Taiwan
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Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications. MATERIALS 2014; 7:5225-5253. [PMID: 28788127 PMCID: PMC5455819 DOI: 10.3390/ma7075225] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 07/01/2014] [Accepted: 07/10/2014] [Indexed: 12/27/2022]
Abstract
Modifying the diameter of the pores in nanoporous anodic alumina opens new possibilities in the application of this material. In this work, we review the different nanoengineering methods by classifying them into two kinds: in situ and ex situ. Ex situ methods imply the interruption of the anodization process and the addition of intermediate steps, while in situ methods aim at realizing the in-depth pore modulation by continuous changes in the anodization conditions. Ex situ methods permit a greater versatility in the pore geometry, while in situ methods are simpler and adequate for repeated cycles. As an example of ex situ methods, we analyze the effect of changing drastically one of the anodization parameters (anodization voltage, electrolyte composition or concentration). We also introduce in situ methods to obtain distributed Bragg reflectors or rugate filters in nanoporous anodic alumina with cyclic anodization voltage or current. This nanopore engineering permits us to propose new applications in the field of biosensing: using the unique reflectance or photoluminescence properties of the material to obtain photonic barcodes, applying a gold-coated double-layer nanoporous alumina to design a self-referencing protein sensor or giving a proof-of-concept of the refractive index sensing capabilities of nanoporous rugate filters.
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40
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Kumeria T, Santos A, Losic D. Nanoporous anodic alumina platforms: engineered surface chemistry and structure for optical sensing applications. SENSORS (BASEL, SWITZERLAND) 2014; 14:11878-918. [PMID: 25004150 PMCID: PMC4168464 DOI: 10.3390/s140711878] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 06/23/2014] [Accepted: 06/25/2014] [Indexed: 12/27/2022]
Abstract
Electrochemical anodization of pure aluminum enables the growth of highly ordered nanoporous anodic alumina (NAA) structures. This has made NAA one of the most popular nanomaterials with applications including molecular separation, catalysis, photonics, optoelectronics, sensing, drug delivery, and template synthesis. Over the past decades, the ability to engineer the structure and surface chemistry of NAA and its optical properties has led to the establishment of distinctive photonic structures that can be explored for developing low-cost, portable, rapid-response and highly sensitive sensing devices in combination with surface plasmon resonance (SPR) and reflective interference spectroscopy (RIfS) techniques. This review article highlights the recent advances on fabrication, surface modification and structural engineering of NAA and its application and performance as a platform for SPR- and RIfS-based sensing and biosensing devices.
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Affiliation(s)
- Tushar Kumeria
- School of Chemical Engineering, Engineering North Building, The University of Adelaide, North Terrace Campus, Adelaide SA 5005, Australia.
| | - Abel Santos
- School of Chemical Engineering, Engineering North Building, The University of Adelaide, North Terrace Campus, Adelaide SA 5005, Australia.
| | - Dusan Losic
- School of Chemical Engineering, Engineering North Building, The University of Adelaide, North Terrace Campus, Adelaide SA 5005, Australia.
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41
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Lee W, Park SJ. Porous Anodic Aluminum Oxide: Anodization and Templated Synthesis of Functional Nanostructures. Chem Rev 2014; 114:7487-556. [DOI: 10.1021/cr500002z] [Citation(s) in RCA: 905] [Impact Index Per Article: 90.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Woo Lee
- Korea Research Institute of Standards and Science (KRISS), Yuseong, 305-340 Daejeon, Korea
- Department
of Nano Science, University of Science and Technology (UST), Yuseong, 305-333 Daejeon, Korea
| | - Sang-Joon Park
- Korea Research Institute of Standards and Science (KRISS), Yuseong, 305-340 Daejeon, Korea
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42
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Carlson K, Flick L, Hall M. DNA adsorption onto calcium aluminate and silicate glass surfaces. Colloids Surf B Biointerfaces 2014; 117:538-44. [DOI: 10.1016/j.colsurfb.2013.11.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 11/04/2013] [Accepted: 11/10/2013] [Indexed: 11/15/2022]
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Debrassi A, Ribbera A, de Vos WM, Wennekes T, Zuilhof H. Stability of (bio)functionalized porous aluminum oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1311-1320. [PMID: 24471580 DOI: 10.1021/la403525z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Porous aluminum oxide (PAO), a nanostructured support for, among others, culturing microorganisms, was chemically modified in order to attach biomolecules that can selectively interact with target bacteria. We present the first comprehensive study of monolayer-modified PAO using conditions that are relevant to microbial growth with a range of functional groups (carboxylic acid, α-hydroxycarboxylic acid, alkyne, alkene, phosphonic acid, and silane). Their stability was initially assessed in phosphate-buffered saline (pH 7.0) at room temperature. The most stable combination (PAO with phosphonic acids) was further studied over a range of physiological pHs (4-8) and temperatures (up to 80 °C). Varying the pH had no significant effect on the stability, but it gradually decreased with increasing temperature. The stability of phosphonic acid-modified PAO surfaces was shown to depend strongly on the other terminal group of the monolayer structure: in general, hydrophilic monolayers were less stable than hydrophobic monolayers. Finally, an alkyne-terminated PAO surface was reacted with an azide-linked mannose derivative. The resulting mannose-presenting PAO surface showed the clearly increased adherence of a mannose-binding bacterium, Lactobacillus plantarum, and also allowed for bacterial outgrowth.
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Affiliation(s)
- Aline Debrassi
- Laboratory of Organic Chemistry, Wageningen University , Dreijenplein 8, 6703 HB Wageningen, The Netherlands
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44
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Ferré-Borrull J, Rahman MM, Pallarès J, Marsal LF. Tuning nanoporous anodic alumina distributed-Bragg reflectors with the number of anodization cycles and the anodization temperature. NANOSCALE RESEARCH LETTERS 2014; 9:416. [PMID: 25177225 PMCID: PMC4147935 DOI: 10.1186/1556-276x-9-416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 07/16/2014] [Indexed: 05/09/2023]
Abstract
The influence of the anodization temperature and of the number of applied voltage cycles on the photonic properties of nanoporous anodic alumina-based distributed-Bragg reflectors obtained by cyclic voltage anodization is analyzed. Furthermore, the possibility of tuning the stop band central wavelength with a pore-widening treatment after anodization and its combined effect with temperature has been studied by means of scanning electron microscopy and spectroscopic transmittance measurements. The spectra for samples measured right after anodization show irregular stop bands, which become better defined with the pore widening process. The results show that with 50 applied voltage cycles, stop bands are obtained and that increasing the number of cycles contributes to enhancing the photonic stop bands (specially for the case of the as-produced samples) but at the expense of increased scattering losses. The anodization temperature is a crucial factor in the tuning of the photonic stop bands, with a linear rate of 42 nm/°C. The pore widening permits further tuning to reach stop bands with central wavelengths as low as 500 nm. Furthermore, the results also show that applying different anodization temperatures does not have a great influence in the pore-widening rate or in the photonic stop band width.
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Affiliation(s)
- Josep Ferré-Borrull
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avda. Països Catalans 26, Tarragona 43007, Spain
| | - Mohammad Mahbubur Rahman
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avda. Països Catalans 26, Tarragona 43007, Spain
| | - Josep Pallarès
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avda. Països Catalans 26, Tarragona 43007, Spain
| | - Lluís F Marsal
- Department of Electronic, Electric and Automatics Engineering, Universitat Rovira i Virgili, Avda. Països Catalans 26, Tarragona 43007, Spain
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Hartman MR, Ruiz RCH, Hamada S, Xu C, Yancey KG, Yu Y, Han W, Luo D. Point-of-care nucleic acid detection using nanotechnology. NANOSCALE 2013; 5:10141-54. [PMID: 24057263 DOI: 10.1039/c3nr04015a] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Recent developments in nanotechnology have led to significant advancements in point-of-care (POC) nucleic acid detection. The ability to sense DNA and RNA in a portable format leads to important applications for a range of settings, from on-site detection in the field to bedside diagnostics, in both developing and developed countries. We review recent innovations in three key process components for nucleic acid detection: sample preparation, target amplification, and read-out modalities. We discuss how the advancements realized by nanotechnology are making POC nucleic acid detection increasingly applicable for decentralized and accessible testing, in particular for the developing world.
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Affiliation(s)
- Mark R Hartman
- Department of Biological and Environmental Engineering, Cornell University, Ithaca, New York, USA.
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46
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Emoto A, Noguchi N, Kobayashi T, Fukuda T. Fabrication of submicrometer pores with an outer shell using modified poly(vinyl alcohol) and the molecular or particle collection effect. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12601-7. [PMID: 24067099 DOI: 10.1021/la4022068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Pores with an outer shell (POS) are fabricated on the submicrometer scale using modified poly(vinyl alcohol) (PVA). An aqueous solution is mixed with cationic PVA and a water-based colloidal suspension of polystyrene (PS) spheres of submicrometer diameter. The mixture is then spin-coated onto a substrate. The resultant structure is immersed in toluene, which dissolves the PS spheres. As a result, POS are formed by PVA on the substrate. By using PS spheres with 500 nm diameter, the pore openings have a diameter of about 300 nm and are surrounded by the outer shell. This structure exhibits beneficial molecular and particle collection effects, which are attributed to the peripheral shell rising from the surface. In addition, POS can be formed using a photo-cross-linkable PVA that is often used for enzyme-immobilized hydrogel matrices.
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Affiliation(s)
- Akira Emoto
- Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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47
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Fabrication of high quality anodic aluminum oxide (AAO) on low purity aluminum—A comparative study with the AAO produced on high purity aluminum. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.04.160] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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48
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Lim JI, Kim SI, Jung Y, Kim SH. Fabrication and Medical Applications of Lotus-leaf-like Structured Superhydrophobic Surfaces. POLYMER-KOREA 2013. [DOI: 10.7317/pk.2013.37.4.411] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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49
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de Vos WM. Fame and future of faecal transplantations--developing next-generation therapies with synthetic microbiomes. Microb Biotechnol 2013; 6:316-25. [PMID: 23574632 PMCID: PMC3917466 DOI: 10.1111/1751-7915.12047] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 02/20/2013] [Indexed: 12/13/2022] Open
Abstract
While practised for over thousand years, there is presently a renaissance in the interest of using of faecal transplantations to modify the intestinal microbiota of patients. This clinical practice consists of delivering large amounts of bowel microbes in various forms into the intestinal tract of the recipient that usually has been cleared previously. The major reason for the popularity of faecal transplantations is their effectiveness in treating a variety of diseases. Hence, there is a need to develop this procedure to the next level. While there are various developments to select, standardize and store the donor microbiota, it is more challenging to understand the intestinal microbial communities and develop ways to deliver these via robust biotechnological processes. The various approaches that have been followed to do so are discussed in this contribution that is also addressing the concept of the minimal microbiome as well as the production of the synthetic communities that can be instrumental in new therapeutic avenues to modify the intestinal microbiota.
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Affiliation(s)
- Willem M de Vos
- Laboratory of Microbiology, Wageningen University, Wageningen, the Netherlands.
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50
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Han H, Park SJ, Jang JS, Ryu H, Kim KJ, Baik S, Lee W. In situ determination of the pore opening point during wet-chemical etching of the barrier layer of porous anodic aluminum oxide: nonuniform impurity distribution in anodic oxide. ACS APPLIED MATERIALS & INTERFACES 2013; 5:3441-3448. [PMID: 23521656 DOI: 10.1021/am400520d] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Wet-chemical etching of the barrier oxide layer of anodic aluminum oxide (AAO) was systematically investigated by using scanning electron microscopy (SEM), secondary ion mass spectrometry (SIMS), and a newly devised experimental setup that allows accurate in situ determination of the pore opening point during chemical etching of the barrier oxide layer. We found that opening of the barrier oxide layer by wet-chemical etching can be significantly influenced by anodization time (tanodi). According to secondary ion mass spectrometry (SIMS) analysis, porous anodic aluminum oxide (AAO) samples formed by long-term anodization contained a lower level of anionic impurity in the barrier oxide layer compared to the short-term anodized one and consequently exhibited retarded opening of the barrier oxide layer during the wet-chemical etching. The observed compositional dependence on the anodization time (tanodi) in the barrier oxide layer is attributed to the progressive decrease of the electrolyte concentration upon anodization. The etching rate of the outer pore wall at the bottom part is lower than that of the one at the top part due to the lower level of impurity content in that region. This indicates that a concentration gradient of anionic impurity in the outer pore wall oxide may be established along both the vertical and radial directions of cylindrical pores. Apart from the effect of electrolyte concentration on the chemical composition of the barrier oxide layer, significantly decreased current density arising from the lowered concentration of electrolyte during the long-term anodization (~120 h) was found to cause disordering of pores. The results of the present work are expected to provide viable information not only for practical applications of nanoporous AAO in nanotechnology but also for thorough understanding of the self-organized formation of oxide nanopores during anodization.
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Affiliation(s)
- Hee Han
- Korea Research Institute of Standards and Science (KRISS), Yuseong, Daejeon, 305-340, Korea
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