1
|
Fedorov AS, Teplinskaia AS. Thermal Properties of Porous Silicon Nanomaterials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8678. [PMID: 36500175 PMCID: PMC9741138 DOI: 10.3390/ma15238678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
The thermal properties, including the heat capacity, thermal conductivity, effusivity, diffusivity, and phonon density of states of silicon-based nanomaterials are analyzed using a molecular dynamics calculation. These quantities are calculated in more detail for bulk silicon, porous silicon, and a silicon aerocrystal (aerogel), including the passivation of the porous internal surfaces with hydrogen, hydroxide, and oxygen ions. It is found that the heat capacity of these materials increases monotonically by up to 30% with an increase in the area of the porous inner surface and upon its passivation with these ions. This phenomenon is explained by a shift of the phonon density of states of the materials under study to the low-frequency region. In addition, it is shown that the thermal conductivity of the investigated materials depends on the degree of their porosity and can be changed significantly upon the passivation of their inner surface with different ions. It is demonstrated that, in the various simulated types of porous silicon, the thermal conductivity changes by 1-2 orders of magnitude compared with the value for bulk silicon. At the same time, it is found that the nature of the passivation of the internal nanosilicon surfaces affects the thermal conductivity. For example, the passivation of the surfaces with hydrogen does not significantly change this parameter, whereas a passivation with oxygen ions reduces it by a factor of two on average, and passivation with hydroxyl ions increases the thermal conductivity by a factor of 2-3. Similar trends are observed for the thermal effusivities and diffusivities of all the types of nanoporous silicon under passivation, but, in that case, the changes are weaker (by a factor of 1.5-2). The ways of tuning the thermal properties of the new nanostructured materials are outlined, which is important for their application.
Collapse
Affiliation(s)
- Aleksandr S. Fedorov
- International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
| | - Anastasiia S. Teplinskaia
- International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, 660041 Krasnoyarsk, Russia
| |
Collapse
|
2
|
Rodriguez C, Muñoz Noval A, Torres-Costa V, Ceccone G, Manso Silván M. Visible Light Assisted Organosilane Assembly on Mesoporous Silicon Films and Particles. MATERIALS 2019; 12:ma12010131. [PMID: 30609796 PMCID: PMC6337525 DOI: 10.3390/ma12010131] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/17/2018] [Accepted: 12/25/2018] [Indexed: 12/13/2022]
Abstract
Porous silicon (PSi) is a versatile matrix with tailorable surface reactivity, which allows the processing of a range of multifunctional films and particles. The biomedical applications of PSi often require a surface capping with organic functionalities. This work shows that visible light can be used to catalyze the assembly of organosilanes on the PSi, as demonstrated with two organosilanes: aminopropyl-triethoxy-silane and perfluorodecyl-triethoxy-silane. We studied the process related to PSi films (PSiFs), which were characterized by X-ray photoelectron spectroscopy (XPS), time of flight secondary ion mass spectroscopy (ToF-SIMS) and field emission scanning electron microscopy (FESEM) before and after a plasma patterning process. The analyses confirmed the surface oxidation and the anchorage of the organosilane backbone. We further highlighted the surface analytical potential of 13C, 19F and 29Si solid-state NMR (SS-NMR) as compared to Fourier transformed infrared spectroscopy (FTIR) in the characterization of functionalized PSi particles (PSiPs). The reduced invasiveness of the organosilanization regarding the PSiPs morphology was confirmed using transmission electron microscopy (TEM) and FESEM. Relevantly, the results obtained on PSiPs complemented those obtained on PSiFs. SS-NMR suggests a number of siloxane bonds between the organosilane and the PSiPs, which does not reach levels of maximum heterogeneous condensation, while ToF-SIMS suggested a certain degree of organosilane polymerization. Additionally, differences among the carbons in the organic (non-hydrolyzable) functionalizing groups are identified, especially in the case of the perfluorodecyl group. The spectroscopic characterization was used to propose a mechanism for the visible light activation of the organosilane assembly, which is based on the initial photoactivated oxidation of the PSi matrix.
Collapse
Affiliation(s)
- Chloé Rodriguez
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Alvaro Muñoz Noval
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Vicente Torres-Costa
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
- Centro de Microanálisis de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Giacomo Ceccone
- European Commission, Joint Research Center, 21020 Ispra (Va), Italy.
| | - Miguel Manso Silván
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| |
Collapse
|
3
|
Kumeria T, McInnes SJP, Maher S, Santos A. Porous silicon for drug delivery applications and theranostics: recent advances, critical review and perspectives. Expert Opin Drug Deliv 2017; 14:1407-1422. [DOI: 10.1080/17425247.2017.1317245] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Tushar Kumeria
- School of Chemical Engineering, The University of Adelaide, Adelaide, Australia
| | - Steven J. P. McInnes
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, Australia
| | - Shaheer Maher
- School of Chemical Engineering, The University of Adelaide, Adelaide, Australia
- Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Abel Santos
- School of Chemical Engineering, The University of Adelaide, Adelaide, Australia
- Institute for Photonics and Advanced Sensing (IPAS), The University of Adelaide, Adelaide, Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP), The University of Adelaide, Adelaide, Australia
| |
Collapse
|
4
|
Hernández-Montelongo J, Muñoz-Noval A, García-Ruíz JP, Torres-Costa V, Martín-Palma RJ, Manso-Silván M. Nanostructured porous silicon: the winding road from photonics to cell scaffolds - a review. Front Bioeng Biotechnol 2015; 3:60. [PMID: 26029688 PMCID: PMC4426817 DOI: 10.3389/fbioe.2015.00060] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 04/17/2015] [Indexed: 11/21/2022] Open
Abstract
For over 20 years, nanostructured porous silicon (nanoPS) has found a vast number of applications in the broad fields of photonics and optoelectronics, triggered by the discovery of its photoluminescent behavior in 1990. Besides, its biocompatibility, biodegradability, and bioresorbability make porous silicon (PSi) an appealing biomaterial. These properties are largely a consequence of its particular susceptibility to oxidation, leading to the formation of silicon oxide, which is readily dissolved by body fluids. This paper reviews the evolution of the applications of PSi and nanoPS from photonics through biophotonics, to their use as cell scaffolds, whether as an implantable substitute biomaterial, mainly for bony and ophthalmological tissues, or as an in vitro cell conditioning support, especially for pluripotent cells. For any of these applications, PSi/nanoPS can be used directly after synthesis from Si wafers, upon appropriate surface modification processes, or as a composite biomaterial. Unedited studies of fluorescently active PSi structures for cell culture are brought to evidence the margin for new developments.
Collapse
Affiliation(s)
- Jacobo Hernández-Montelongo
- Departamento de Física Aplicada, Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Brazil
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, Madrid, Spain
| | - Alvaro Muñoz-Noval
- Instituto de Ciencia de Materiales de Madrid-CSIC, Spanish CRG Beamline at ESRF, Grenoble, France
| | | | - Vicente Torres-Costa
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, Madrid, Spain
- Centro de Micro-Análisis de Materiales, Universidad Autónoma de Madrid, Madrid, Spain
| | | | - Miguel Manso-Silván
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, Madrid, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid, Spain
| |
Collapse
|
5
|
Alarcón H, Ynsa MD, Dang ZY, Torres-Costa V, Manso-Silván M, Wu JF, Breese MBH, García-Ruiz JP. Conditioned bio-interfaces of silicon/porous silicon micro-patterns lead to the chondrogenesis of hMSCs. RSC Adv 2015. [DOI: 10.1039/c5ra09069e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
hMSCs find attractive both Si and PSi surfaces to develop cell-surface adhesions which are needed in differentiation and the presence of CM-hMSCs bio-interface improves the differentiation process with respect to a control PSi surface.
Collapse
Affiliation(s)
- H. Alarcón
- Molecular Biology Department
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - M. D. Ynsa
- Department of Applied Physics and Instituto Nicolás Cabrera
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Centro de Micro-Análisis de Materiales (CMAM)
| | - Z. Y. Dang
- Centre for Ion Beam Applications (CIBA)
- Department of Physics
- National University of Singapore
- Singapore 117542
| | - V. Torres-Costa
- Department of Applied Physics and Instituto Nicolás Cabrera
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Centro de Micro-Análisis de Materiales (CMAM)
| | - M. Manso-Silván
- Department of Applied Physics and Instituto Nicolás Cabrera
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - J. F. Wu
- Centre for Ion Beam Applications (CIBA)
- Department of Physics
- National University of Singapore
- Singapore 117542
| | - M. B. H. Breese
- Centre for Ion Beam Applications (CIBA)
- Department of Physics
- National University of Singapore
- Singapore 117542
| | - J. P. García-Ruiz
- Molecular Biology Department
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| |
Collapse
|
6
|
Gallach Pérez D, Punzón Quijorna E, Sanz R, Torres-Costa V, García Ruiz JP, Manso Silván M. Nanotopography enhanced mobility determines mesenchymal stem cell distribution on micropatterned semiconductors bearing nanorough areas. Colloids Surf B Biointerfaces 2014; 126:146-53. [PMID: 25546837 DOI: 10.1016/j.colsurfb.2014.11.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 11/27/2014] [Accepted: 11/30/2014] [Indexed: 11/17/2022]
Abstract
Surface micropatterns are relevant instruments for the in vitro analysis of cell cultures in non-conventional planar conditions. In this work, two semiconductors (Si and TiO2) have been micropatterned by combined ion-beam/chemical-etching processes leading to selective areas bearing nanorough features. A preferential affinity of human mesenchymal stem cells (hMSCs) for planar areas versus nanotopographic ones is observed. Fluorescence microscopy after β-catenin staining suggests that hMSCs adhesion is inhibited on nanostructured porous silicon areas. This has a direct impact in the development of actin fibers and suggests different cell migration mechanisms on the materials of a micropattern. hMSCs organization on nanotopographic micropatterns has been modeled by using a simplified random walk approach. The model attributes preferential cell mobilities on the nanotopographic areas with respect to the planar and considers purely stochastic movement with no inertial term. Simulations of the cell distribution have been run on 1D and 2D micropatterns and compared with the real hMSC cultures. The simulations allow defining two regimes for cell organization as a function of cell density. hMSCs ordering on planar areas is diffusion-induced in most micropatterns but constriction forced disorder appears for high cell densities. The relative mobility on the planar versus nanotopographic areas can be used as a quality indicator of the nanotopography contrasts in the diffusion induced ordering regime. It is shown that the relative mobility is favorable for the TiO2 versus the Si based system, and allows envisaging its use for the calibrated design of nanotopography based micropatterned materials.
Collapse
Affiliation(s)
- Darío Gallach Pérez
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Esther Punzón Quijorna
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Centro de Microanálisis de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Ruy Sanz
- CNR-IMM, Università di Catania, Via Santa Sofia 64, 95123 Catania, Italy
| | - Vicente Torres-Costa
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Centro de Microanálisis de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Josefa P García Ruiz
- Departamento de Biología Molecular, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Miguel Manso Silván
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| |
Collapse
|
7
|
Ynsa MD, Dang ZY, Manso-Silvan M, Song J, Azimi S, Wu JF, Liang HD, Torres-Costa V, Punzon-Quijorna E, Breese MBH, Garcia-Ruiz JP. Reprogramming hMSCs morphology with silicon/porous silicon geometric micro-patterns. Biomed Microdevices 2014; 16:229-36. [PMID: 24305875 DOI: 10.1007/s10544-013-9826-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Geometric micro-patterned surfaces of silicon combined with porous silicon (Si/PSi) have been manufactured to study the behaviour of human Mesenchymal Stem Cells (hMSCs). These micro-patterns consist of regular silicon hexagons surrounded by spaced columns of silicon equilateral triangles separated by PSi. The results show that, at an early culture stage, the hMSCs resemble quiescent cells on the central hexagons with centered nuclei and actin/β-catenin and a microtubules network denoting cell adhesion. After 2 days, hMSCs adapted their morphology and cytoskeleton proteins from cell-cell dominant interactions at the center of the hexagonal surface. This was followed by an intermediate zone with some external actin fibres/β-catenin interactions and an outer zone where the dominant interactions are cell-silicon. Cells move into silicon columns to divide, migrate and communicate. Furthermore, results show that Runx2 and vitamin D receptors, both specific transcription factors for skeleton-derived cells, are expressed in cells grown on micropatterned silicon under all observed circumstances. On the other hand, non-phenotypic alterations are under cell growth and migration on Si/PSi substrates. The former consideration strongly supports the use of micro-patterned silicon surfaces to address pending questions about the mechanisms of human bone biogenesis/pathogenesis and the study of bone scaffolds.
Collapse
Affiliation(s)
- M D Ynsa
- Department of Applied Physics, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049, Madrid, Spain,
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Peláez RJ, Afonso CN, Vega F, Recio-Sánchez G, Torres-Costa V, Manso-Silván M, García-Ruiz JP, Martín-Palma RJ. Laser fabrication of porous silicon-based platforms for cell culturing. J Biomed Mater Res B Appl Biomater 2014; 101:1463-8. [PMID: 24591224 DOI: 10.1002/jbm.b.32966] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 03/14/2013] [Accepted: 04/10/2013] [Indexed: 02/01/2023]
Abstract
In this study, we explore the selective culturing of human mesenchymal stem cells (hMSCs) on Si-based diffractive platforms. We demonstrate a single-step and flexible method for producing platforms on nanostructured porous silicon (nanoPS) based on the use of single pulses of an excimer laser to expose phase masks. The resulting patterns are typically 1D patterns formed by fringes or 2D patterns formed by circles. They are formed by alternate regions of almost unmodified nanoPS and regions where the nanoPS surface has melted and transformed into Si nanoparticles. The patterns are produced in relatively large areas (a few square millimeters) and can have a wide range of periodicities and aspect ratios. Direct binding, that is, with no previous functionalization of the pattern, alignment, and active polarization of hMSCs are explored. The results show the preferential direct binding of the hMSCs along the transformed regions whenever their width compares with the dimensions of the cells and they escape from patterns for smaller widths suggesting that the selectivity can be tailored through the pattern period.
Collapse
Affiliation(s)
- Ramón-J Peláez
- Laser Processing Group, Instituto de Óptica, CSIC, Serrano 121, 28006, Madrid, Spain
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Hernandez-Montelongo J, Naveas N, Degoutin S, Tabary N, Chai F, Spampinato V, Ceccone G, Rossi F, Torres-Costa V, Manso-Silvan M, Martel B. Porous silicon-cyclodextrin based polymer composites for drug delivery applications. Carbohydr Polym 2014; 110:238-52. [DOI: 10.1016/j.carbpol.2014.04.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 03/19/2014] [Accepted: 04/02/2014] [Indexed: 10/25/2022]
|
10
|
Collart-Dutilleul PY, Secret E, Panayotov I, Deville de Périère D, Martín-Palma RJ, Torres-Costa V, Martin M, Gergely C, Durand JO, Cunin F, Cuisinier FJ. Adhesion and proliferation of human mesenchymal stem cells from dental pulp on porous silicon scaffolds. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1719-28. [PMID: 24428409 DOI: 10.1021/am4046316] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In regenerative medicine, stem-cell-based therapy often requires a scaffold to deliver cells and/or growth factors to the injured site. Porous silicon (pSi) is a promising biomaterial for tissue engineering as it is both nontoxic and bioresorbable. Moreover, surface modification can offer control over the degradation rate of pSi and can also promote cell adhesion. Dental pulp stem cells (DPSC) are pluripotent mesenchymal stem cells found within the teeth and constitute a readily source of stem cells. Thus, coupling the good proliferation and differentiation capacities of DPSC with the textural and chemical properties of the pSi substrates provides an interesting approach for therapeutic use. In this study, the behavior of human DPSC is analyzed on pSi substrates presenting pores of various sizes, 10 ± 2 nm, 36 ± 4 nm, and 1.0 ± 0.1 μm, and undergoing different chemical treatments, thermal oxidation, silanization with aminopropyltriethoxysilane (APTES), and hydrosilylation with undecenoic acid or semicarbazide. DPSC adhesion and proliferation were followed for up to 72 h by fluorescence microscopy, scanning electron microscopy (SEM), enzymatic activity assay, and BrdU assay for mitotic activity. Porous silicon with 36 nm pore size was found to offer the best adhesion and the fastest growth rate for DPSC compared to pSi comporting smaller pore size (10 nm) or larger pore size (1 μm), especially after silanization with APTES. Hydrosilylation with semicarbazide favored cell adhesion and proliferation, especially mitosis after cell adhesion, but such chemical modification has been found to led to a scaffold that is stable for only 24-48 h in culture medium. Thus, semicarbazide-treated pSi appeared to be an appropriate scaffold for stem cell adhesion and immediate in vivo transplantation, whereas APTES-treated pSi was found to be more suitable for long-term in vitro culture, for stem cell proliferation and differentiation.
Collapse
|
11
|
Peláez RJ, Afonso CN, Vega F, Recio-Sánchez G, Torres-Costa V, Manso-Silván M, García-Ruiz JP, Martín-Palma RJ. Laser fabrication of porous silicon-based platforms for cell culturing. J Biomed Mater Res B Appl Biomater 2013:n/a-n/a. [PMID: 23744635 DOI: 10.1002/jbmb.32966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 03/14/2013] [Accepted: 04/10/2013] [Indexed: 11/05/2022]
Abstract
In this study, we explore the selective culturing of human mesenchymal stem cells (hMSCs) on Si-based diffractive platforms. We demonstrate a single-step and flexible method for producing platforms on nanostructured porous silicon (nanoPS) based on the use of single pulses of an excimer laser to expose phase masks. The resulting patterns are typically 1D patterns formed by fringes or 2D patterns formed by circles. They are formed by alternate regions of almost unmodified nanoPS and regions where the nanoPS surface has melted and transformed into Si nanoparticles. The patterns are produced in relatively large areas (a few square millimeters) and can have a wide range of periodicities and aspect ratios. Direct binding, that is, with no previous functionalization of the pattern, alignment, and active polarization of hMSCs are explored. The results show the preferential direct binding of the hMSCs along the transformed regions whenever their width compares with the dimensions of the cells and they escape from patterns for smaller widths suggesting that the selectivity can be tailored through the pattern period. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2013.
Collapse
Affiliation(s)
- Ramón-J Peláez
- Laser Processing Group, Instituto de Óptica, CSIC, Serrano 121, 28006, Madrid, Spain
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Punzón-Quijorna E, Sánchez-Vaquero V, Muñoz-Noval Á, Pérez-Roldán MJ, Martín-Palma RJ, Rossi F, Climent-Font A, Manso-Silván M, Ruiz JPG, Torres-Costa V. Nanostructured porous silicon micropatterns as a tool for substrate-conditioned cell research. NANOSCALE RESEARCH LETTERS 2012; 7:396. [PMID: 22799489 PMCID: PMC3458952 DOI: 10.1186/1556-276x-7-396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 06/26/2012] [Indexed: 06/01/2023]
Abstract
The localized irradiation of Si allows a precise patterning at the microscale of nanostructured materials such as porous silicon (PS). PS patterns with precisely defined geometries can be fabricated using ion stopping masks. The nanoscale textured micropatterns were used to explore their influence as microenvironments for human mesenchymal stem cells (hMSCs). In fact, the change of photoluminescence emission from PS upon aging in physiological solution suggests the intense formation of silanol surface groups, which may play a relevant role in ulterior cell adhesion. The experimental results show that hMSCs are sensitive to the surface micropatterns. In this regard, preliminary β-catenin labeling studies reveal the formation of cell to cell interaction structures, while microtubule orientation is strongly influenced by the selective adhesion conditions. Relevantly, Ki-67 assays support a proliferative state of hMSCs on such nanostructured micropatterns comparable to that of standard cell culture platforms, which reinforce the candidature of porous silicon micropatterns to become a conditioning structure for in vitro culture of HMSCs.
Collapse
Affiliation(s)
- Esther Punzón-Quijorna
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- Centro de Microanálisis de Materiales, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Vanessa Sánchez-Vaquero
- Departamento de Biología Molecular, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Álvaro Muñoz-Noval
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - M Jesus Pérez-Roldán
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Ispra (VA), 21027, Italy
| | - Raúl J Martín-Palma
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Francois Rossi
- European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Ispra (VA), 21027, Italy
| | - Aurelio Climent-Font
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- Centro de Microanálisis de Materiales, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Miguel Manso-Silván
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - J Predestinacion García Ruiz
- Departamento de Biología Molecular, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Vicente Torres-Costa
- Departamento de Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| |
Collapse
|
13
|
Torres-Costa V, Martínez-Muñoz G, Sánchez-Vaquero V, Muñoz-Noval Á, González-Méndez L, Punzón-Quijorna E, Gallach-Pérez D, Manso-Silván M, Climent-Font A, García-Ruiz JP, Martín-Palma RJ. Engineering of silicon surfaces at the micro- and nanoscales for cell adhesion and migration control. Int J Nanomedicine 2012; 7:623-30. [PMID: 22346355 PMCID: PMC3277440 DOI: 10.2147/ijn.s27745] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The engineering of surface patterns is a powerful tool for analyzing cellular communication factors involved in the processes of adhesion, migration, and expansion, which can have a notable impact on therapeutic applications including tissue engineering. In this regard, the main objective of this research was to fabricate patterned and textured surfaces at micron- and nanoscale levels, respectively, with very different chemical and topographic characteristics to control cell–substrate interactions. For this task, one-dimensional (1-D) and two-dimensional (2-D) patterns combining silicon and nanostructured porous silicon were engineered by ion beam irradiation and subsequent electrochemical etch. The experimental results show that under the influence of chemical and morphological stimuli, human mesenchymal stem cells polarize and move directionally toward or away from the particular stimulus. Furthermore, a computational model was developed aiming at understanding cell behavior by reproducing the surface distribution and migration of human mesenchymal stem cells observed experimentally.
Collapse
|