1
|
Curley JL, Sklare SC, Bowser DA, Saksena J, Moore MJ, Chrisey DB. Isolated node engineering of neuronal systems using laser direct write. Biofabrication 2016; 8:015013. [DOI: 10.1088/1758-5090/8/1/015013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
2
|
Grumezescu AM, Cristescu R, Chifiriuc MC, Dorcioman G, Socol G, Mihailescu IN, Mihaiescu DE, Ficai A, Vasile OR, Enculescu M, Chrisey DB. Fabrication of magnetite-based core-shell coated nanoparticles with antibacterial properties. Biofabrication 2015; 7:015014. [PMID: 25797361 DOI: 10.1088/1758-5090/7/1/015014] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report the fabrication of biofunctionalized magnetite core/sodium lauryl sulfate shell/antibiotic adsorption-shell nanoparticles assembled thin coatings by matrix assisted pulsed laser evaporation for antibacterial drug-targeted delivery. Magnetite nanoparticles have been synthesized and subsequently characterized by transmission electron microscopy and x-ray diffraction. The obtained thin coatings have been investigated by FTIR and scanning electron microscope, and tested by in vitro biological assays, for their influence on in vitro bacterial biofilm development and cytotoxicity on human epidermoid carcinoma (HEp2) cells.
Collapse
Affiliation(s)
- A M Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 1-7 Polizu Street, 011061, Bucharest, Romania
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Abstract
Embryonic stem cells (ESCs) have the potential to self-renew and differentiate into any specialized cell type. One common method to differentiate ESCs in vitro is through embryoid bodies (EBs), three-dimensional cellular aggregates that spontaneously self-assemble and generally express markers for the three germ layers, endoderm, ectoderm, and mesoderm. It has been previously shown that both EB size and 2D colony size each influence differentiation. We hypothesized that we could control the size of the EB formed by mouse ESCs (mESCs) by using a cell printing method, laser direct-write (LDW), to control both the size of the initial printed colony and the local cell density in printed colonies. After printing mESCs at various printed colony sizes and printing densities, two-way ANOVAs indicated that the EB diameter was influenced by printing density after three days (p = 0.0002), while there was no effect of the printed colony diameter on the EB diameter at the same timepoint (p = 0.74). There was no significant interaction between these two factors. Tukey's honestly significant difference test showed that high-density colonies formed significantly larger EBs, suggesting that printed mESCs quickly aggregate with nearby cells. Thus, EBs can be engineered to a desired size by controlling printing density, which will influence the design of future differentiation studies. Herein, we highlight the capacity of LDW to control the local cell density and colony size independently, at prescribed spatial locations, potentially leading to better stem cell maintenance and directed differentiation.
Collapse
Affiliation(s)
- A D Dias
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, NY 12180, USA
| | | | | | | | | |
Collapse
|
4
|
Abstract
Alginate can be used to encapsulate mammalian cells and for the slow release of small molecules. Packaging alginate as microbead structures allows customizable delivery for tissue engineering, drug release, or contrast agents for imaging. However, state-of-the-art microbead fabrication has a limited range in achievable bead sizes, and poor control over bead placement, which may be desired to localize cellular signaling or delivery. Herein, we present a novel, laser-based method for single-step fabrication and precise planar placement of alginate microbeads. Our results show that bead size is controllable within 8%, and fabricated microbeads can remain immobilized within 2% of their target placement. Demonstration of this technique using human breast cancer cells shows that cells encapsulated within these microbeads survive at a rate of 89.6%, decreasing to 84.3% after five days in culture. Infusing rhodamine dye into microbeads prior to fluorescent microscopy shows their 3D spheroidal geometry and the ability to sequester small molecules. Microbead fabrication and patterning is compatible with conventional cellular transfer and patterning by laser direct-write, allowing location-based cellular studies. While this method can also be used to fabricate microbeads en masse for collection, the greatest value to tissue engineering and drug delivery studies and applications lies in the pattern registry of printed microbeads.
Collapse
Affiliation(s)
- DM Kingsley
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 Eighth St., Troy, NY 12180, USA
| | - AD Dias
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 Eighth St., Troy, NY 12180, USA
| | - DB Chrisey
- Department of Physics, Tulane University, 6823 St. Charles Avenue New Orleans, LA 70118, USA
| | - DT Corr
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, 110 Eighth St., Troy, NY 12180, USA
| |
Collapse
|
5
|
Mihaiescu DE, Cristescu R, Dorcioman G, Popescu CE, Nita C, Socol G, Mihailescu IN, Grumezescu AM, Tamas D, Enculescu M, Negrea RF, Ghica C, Chifiriuc C, Bleotu C, Chrisey DB. Functionalized magnetite silica thin films fabricated by MAPLE with antibiofilm properties. Biofabrication 2012; 5:015007. [PMID: 23254399 DOI: 10.1088/1758-5082/5/1/015007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report on the fabrication of magnetite/salicylic acid/silica shell/antibiotics (Fe(3)O(4)/SA/SiO(2)/ATB) thin films by matrix-assisted pulsed laser evaporation (MAPLE) to inert substrates. Fe(3)O(4)-based powder have been synthesized and investigated by XRD and TEM. All thin films were studied by FTIR, SEM and in vitro biological assays using Staphylococcus aureus and Pseudomonas aeruginosa reference strains, as well as eukaryotic HEp-2 cells. The influence of the obtained nanosystems on the microbial biofilm development as well as their biocompatibility has been assessed. For optimum deposition conditions, we obtained uniform adherent films with the composition identical with the raw materials. Fe(3)O(4)/SA/SiO(2)/ATB thin films had an inhibitory activity on the ability of microbial strains to initiate and develop mature biofilms, in a strain- and antibiotic-dependent manner. These magnetite silica thin films are promising candidates for the development of novel materials designed for the inhibition of medical biofilms formed by different pathogenic agents on common substrates, frequently implicated in the etiology of chronic and hard to treat infections.
Collapse
Affiliation(s)
- D E Mihaiescu
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 1-7 Polizu Street, Bucharest, Romania
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Abstract
ABSTRACTWe have investigated the composition and structure of thin films of PbZrxTi1-xO3 (x-0.54) produced in situ by pulsed excimer laser deposition from a stoichiometric pressed oxide target. Thin films were deposited onto (100) MgO and SrTiO3 substrates as a function of substrate temperature between room temperature and 750 °C, and oxygen background pressures between vacuum and 300 mtorr. The deposited films were very smooth with particulates covering less than 0.5% of the surface. Elastic backscattering spectroscopy was used to determine the relative atomic fractions. In the deposited films, the Pb stoichiometry was found to be very sensitive to both the substrate temperature and the O2 background pressure. Above ∼600 °C, the Pb content dropped rapidly with increasing substrate temperature for a 50 mtorr 02 background. At 550 °C the Pb content was near-stoichiometric for O2 background pressures between 200 and 300 mtorr but dropped monotonically to ∼20% of the expected value for depositions in a vacuum (i.e., no O2 background). Over this entire range of pressures and temperatures the Ti/Zr stoichiometry ratio was relatively uneffected. The structure and orientation of the deposited films, as determined by x-ray diffraction, followed the Pb deficiency via the production of other phases and orientations. Crystallation of the deposited film was observed at temperatures as low as 400 °C for 200 mtorr O2 background. At 550 °C and 200 –300 mtorr, (100) oriented PbZrxTi1-xO3 was observed on SrTiO3 substrates.
Collapse
|
7
|
Piqué A, McGill RCRA, Chrisey DB, Callahan J, Mlsna TE. Matrix Assisted Pulsed Laser Evaporation (Maple) of Polymeric Materials: Methodology and Mechanistic Studies. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-526-375] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractA new matrix assisted pulsed laser evaporation (MAPLE) technique has been developed at the Naval Research Laboratory, to deposit superior quality ultra thin, and uniform films for a range of highly functionalized polymeric materials. The MAPLE technique is carried out in a vacuum chamber, and involves directing a pulsed laser beam onto a frozen target, consisting of a polymer dissolved in a solvent matrix. The laser beam evaporates the surface layers of the target, where both solvent and polymer molecules are lifted into the evacuated gas phase. A solvent and polymer plume are generated incident to the substrate being coated. Si(111), and NaCl substrates coated with thin layers of polymer have been examined by a range of techniques including: optical microscopy, scanning electron microscopy and Fourier transform infra-red spectroscopy. Under optimum conditions the native polymer was transferred to the substrate without chemical modification as a highly uniform film.The MAPLE technique offers a number of advantages over conventional polymer deposition techniques, including the ability to precisely and accurately coat a relatively large or small targeted area with an ultrathin, and uniform coating with sub monolayer thickness control. Conventional pulsed laser ablation techniques can be utilized for coating a limited number of polymers, but we have found that for highly functionalized materials the native polymer structure is almost completely lost in the process. In contrast, when the MAPLE conditions are optimized the deposition of even highly functionalized polymeric materials proceeds with little effect on the intrinsic polymer structure.
Collapse
|
8
|
Affiliation(s)
- Xiao Liu
- a SFA Inc., Largo , Maryland , 20774 , USA
| | | | | | - D. B. Chrisey
- b Naval Research Laboratory , Washington, DC, 20375 , USA
| | - R. O. Pohl
- c Department of Physics , Cornell University Ithaca , New York , 14853-2501 , USA
| | - R. S. Crandall
- d National Renewable Energy Laboratory , Golden , Colorado , 80401 , USA
| |
Collapse
|
9
|
Patz TM, Doraiswamy A, Narayan RJ, He W, Zhong Y, Bellamkonda R, Modi R, Chrisey DB. Three-dimensional direct writing of B35 neuronal cells. J Biomed Mater Res B Appl Biomater 2007; 78:124-30. [PMID: 16333853 DOI: 10.1002/jbm.b.30473] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have demonstrated two-dimensional and three-dimensional transfer of B35 neuronal cells onto and within polymerized Matrigel substrates, using matrix-assisted pulsed laser evaporation-direct write (MDW). The B35 cells were transferred from a quartz ribbon to depths of up to 75 microm by systematically varying the fluence emitted from the ArF (lambda = 193 nm) laser source. MDW-transferred cells were examined using terminal deoxynucleotidyl transferase biotin-dUTP nick end labeling (TUNEL), 4',6-diamidino-2-phenylindole (DAPI), and alpha-tubulin staining. Confocal microscopy has shown that the transferred B35 cells extended their axons outward in three dimensions within the polymerized Matrigel substrate. The B35 cells made axonal connections and formed a three-dimensional neural network within 72 h after MDW transfer. In addition, TUNEL staining demonstrated that only 3% of the B35 cells underwent apoptosis after being transferred using the MDW process. MDW and other emergent direct write processes may provide unique approaches for creating layered, heterogeneous, three-dimensional cell-seeded scaffolds for use in peripheral nerve repair.
Collapse
Affiliation(s)
- T M Patz
- School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Cristescu R, Jelinek M, Kocourek T, Axente E, Grigorescu S, Moldovan A, Mihaiescu DE, Albulescu M, Buruiana T, Dybal J, Stamatin I, Mihailescu IN, Chrisey DB. Matrix assisted pulsed laser evaporation of pullulan tailor-made biomaterial thin films for controlled drug delivery systems. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/59/1/031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Doraiswamy A, Narayan RJ, Harris ML, Qadri SB, Modi R, Chrisey DB. Laser microfabrication of hydroxyapatite-osteoblast-like cell composites. J Biomed Mater Res A 2007; 80:635-43. [PMID: 17051538 DOI: 10.1002/jbm.a.30969] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We have developed a novel approach for layer-by-layer growth of tissue-engineered materials using a direct writing process known as matrix assisted pulsed laser evaporation direct write (MAPLE DW). Unlike conventional cell-seeding methods, this technique provides the possibility for cell-material integration prior to artificial tissue fabrication. This process also provides greater flexibility in selection and processing of scaffold materials. In addition, MAPLE DW offers rapid computer-controlled deposition of mesoscopic voxels at high spatial resolutions. We have examined MAPLE DW processing of zirconia and hydroxyapatite scaffold materials that can provide a medical device with nearly inert and bioactive implant-tissue interfaces, respectively. We have also demonstrated codeposition of hydroxyapatite, MG 63 osteoblast-like cells, and extracellular matrix using MAPLE DW. We have shown that osteoblast-like cells remain viable and retain the capacity for proliferation when codeposited with bioceramic scaffold materials. Our results on MG 63-hydroxyapatite composites can be extended to develop other integrated cell-scaffold structures for medical and dental applications.
Collapse
Affiliation(s)
- A Doraiswamy
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | | | | | | | | | | |
Collapse
|
12
|
Abstract
Cells are composed of macromolecular structures of various sizes that act individually or collectively to maintain their viability and perform their function within the organism. This review focuses on one structure, the microtubule, and one of the motor proteins that move along it, conventional kinesin (kinesin 1). Recent work on the cellular functions of kinesins, such as the organization of microtubules during cellular division and the movement of the organelles and vesicles, offers insights into how biological motors might prove useful for organizing structures in engineered environments.
Collapse
Affiliation(s)
- C Z Dinu
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.
| | | | | | | |
Collapse
|
13
|
Doraiswamy A, Jin C, Narayan RJ, Mageswaran P, Mente P, Modi R, Auyeung R, Chrisey DB, Ovsianikov A, Chichkov B. Two photon induced polymerization of organic-inorganic hybrid biomaterials for microstructured medical devices. Acta Biomater 2006; 2:267-75. [PMID: 16701886 DOI: 10.1016/j.actbio.2006.01.004] [Citation(s) in RCA: 167] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2005] [Revised: 12/27/2005] [Accepted: 01/12/2006] [Indexed: 11/29/2022]
Abstract
Three-dimensional microstructured medical devices, including microneedles and tissue engineering scaffolds, were fabricated by two photon induced polymerization of Ormocer organic-inorganic hybrid materials. Femtosecond laser pulses from a titanium:sapphire laser were used to break chemical bonds on Irgacure 369 photoinitiator within a small focal volume. The radicalized starter molecules reacted with Ormocer US-S4 monomers to create radicalized polymolecules. The desired structures are fabricated by moving the laser focus in three dimensions using a galvano-scanner and a micropositioning system. Ormocer surfaces fabricated using two photon induced polymerization demonstrated acceptable cell viability and cell growth profiles against B35 neuroblast-like cells and HT1080 epithelial-like cells. Lego-like interlocking tissue engineering scaffolds and microneedle arrays with unique geometries were created using two photon induced polymerization. These results suggest that two photon induced polymerization is able to create medical microdevices with a larger range of sizes, shapes, and materials than chemical isotropic etching, injection molding, reactive ion etching, surface micromachining, bulk micromachining, polysilicon micromolding, lithography-electroforming-replication, or other conventional microfabrication techniques.
Collapse
Affiliation(s)
- A Doraiswamy
- Joint Department of Biomedical Engineering, University of North Carolina, Campus Box 7575, Chapel Hill, NC 27599-7575, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Affiliation(s)
- D B Chrisey
- US Naval Research Laboratory, Washington, DC 20375-5345, USA
| | | | | | | | | | | | | |
Collapse
|
15
|
Ringeisen BR, Wu PK, Kim H, Piqué A, Auyeung RYC, Young HD, Chrisey DB, Krizman DB. Picoliter-scale protein microarrays by laser direct write. Biotechnol Prog 2002; 18:1126-9. [PMID: 12363367 DOI: 10.1021/bp015516g] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the accurate picoliter-scale dispensing of active proteins using a novel laser transfer technique. Droplets of protein solution are dispensed onto functionalized glass slides and into plastic microwells, activating as small as 50-microm diameter areas on these surfaces. Protein microarrays fabricated by laser transfer were assayed using standard fluorescent labeling techniques to demonstrate successful protein and antigen binding. These results indicate that laser transfer does not damage the active site of the dispensed protein and that this technique can be used to successfully fabricate a functioning protein microarray. Also, as a result of the efficient nature of the process, material usage is reduced by two to four orders of magnitude compared to conventional pin dispensing methods for protein spotting.
Collapse
Affiliation(s)
- B R Ringeisen
- Naval Research Laboratory, Washington DC 20375, USA.
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Ringeisen BR, Chrisey DB, Piqué A, Young HD, Jones-Meehan J, Modi R, Bucaro M, Spargo BJ. Generation of mesoscopic patterns of viable Escherichia coli by ambient laser transfer. Biomaterials 2002; 23:161-6. [PMID: 11762834 DOI: 10.1016/s0142-9612(01)00091-6] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We have generated mesoscopic patterns of viable Escherichia coli on Si(1 1 1), glass, and nutrient agar plates by using a novel laser-based transfer process termed matrix assisted pulsed laser evaporation direct write (MAPLE DW). We observe no alterations to the E. coli induced by the laser-material interaction or the shear forces during the transfer. Transferred E. coli patterns were observed by optical and electron microscopes, and cell viability was shown through green fluorescent protein (GFP) expression and cell culturing experiments. The transfer mechanism for our approach appears remarkably gentle and suggests that active biomaterials such as proteins, DNA and antibodies could be serially deposited adjacent to viable cells. Furthermore, this technique is a direct write technology and therefore does not involve the use of masks, etching, or other lithographic tools.
Collapse
Affiliation(s)
- B R Ringeisen
- Plasma Processing Section/Code 6372, Naval Research Laboratory, Washington, DC 20375, USA.
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Ringeisen BR, Piqué A, Chrisey DB. Next-generation applications for laser-based tools in biotechnology. Am Clin Lab 2001; 20:36-8. [PMID: 11505877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- B R Ringeisen
- Naval Research Laboratory, 4555 Overlook Ave., SW, Code 6372, Washington, DC 20375, USA.
| | | | | |
Collapse
|
18
|
Abstract
In a direct-write approach, micrometer-scale structures are built directly without the use of masks, allowing rapid prototyping. Direct-write approaches are enabling faster, cheaper manufacture of electronic components and are also used for tissue engineering and array-based biosensors. In his Perspective, Chrisey provides a short overview of current research in the area of direct-write technologies, focusing on the materials science aspects.
Collapse
|
19
|
Jaime M, Salamon MB, Rubinstein M, Treece RE, Horwitz JS, Chrisey DB. High-temperature thermopower in La2/3Ca1/3MnO3 films: Evidence for polaronic transport. Phys Rev B Condens Matter 1996; 54:11914-11917. [PMID: 9985029 DOI: 10.1103/physrevb.54.11914] [Citation(s) in RCA: 117] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
20
|
Blackstead HA, Dow JD, Chrisey DB, Horwitz JS, Black MA, McGinn PJ, Klunzinger AE, Pulling DB. Observation of superconductivity in PrBa2Cu3O7. Phys Rev B Condens Matter 1996; 54:6122-6125. [PMID: 9986623 DOI: 10.1103/physrevb.54.6122] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
21
|
Treece RE, Osofsky MS, Skelton EF, Qadri SB, Horwitz JS, Chrisey DB. New phase of superconducting NbN stabilized by heteroepitaxial film growth. Phys Rev B Condens Matter 1995; 51:9356-9359. [PMID: 9977587 DOI: 10.1103/physrevb.51.9356] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
22
|
Abstract
Skin exit site infections are a major source of morbidity in patients with indwelling percutaneous catheters. Ceramic materials, such as hydroxyapatite (HA) and alumina, have demonstrated excellent biocompatibility and low rates of infection in soft tissues. Previous attempts to design ceramic materials for use as percutaneous connectors have resulted in rigid discs or solid cylindrical tubes. In order to take advantage of the inherent properties of HA without reducing patient comfort or mobility, the feasibility of applying a thin film of HA directly onto a flexible polymeric catheter was studied. The coating was applied by pulsed laser deposition (PLD). The beam from a KrF excimer laser impinged upon a target of pressed and sintered HA, producing a plume of ablated material that was deposited onto the catheter tubing. By rotating the tubing, an even coating of HA was applied to the catheter at a thickness of approximately 0.50 microm. The coating did not compromise the flexibility of the catheter tubing. Hence, PLD of a thin film of HA at the exit site of percutaneous catheters may be a means of incorporating the bioactive and biocompatible properties of HA with the mobility and patient comfort that characterize polymeric catheters.
Collapse
Affiliation(s)
- P M Zabetakis
- Nephrology Section, Lenox Hill Hospital, New York, NY 10021, USA
| | | | | | | |
Collapse
|
23
|
Rubinstein M, Das BN, Koon NC, Chrisey DB, Horwitz J. Ferromagnetic-resonance studies of granular giant-magnetoresistive materials. Phys Rev B Condens Matter 1994; 50:184-192. [PMID: 9974530 DOI: 10.1103/physrevb.50.184] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
24
|
Blackstead HA, Pulling DB, Horwitz JS, Chrisey DB. Observation of flux flow in superconducting YBa2Cu3O7- delta films. Phys Rev B Condens Matter 1994; 49:15335-15340. [PMID: 10010648 DOI: 10.1103/physrevb.49.15335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
25
|
Rubinstein M, Lubitz P, Carlos WE, Broussard PR, Chrisey DB, Horwitz J, Krebs JJ. Properties of superconductor-ferromagnet bilayers: YBa2CuO3-Fe and YBa2CuO3-Permalloy. Phys Rev B Condens Matter 1993; 47:15350-15353. [PMID: 10005924 DOI: 10.1103/physrevb.47.15350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
26
|
Rice JK, McCauley SW, Baronavski AP, Horwitz JS, Chrisey DB. Probing thin-film YBa2Cu3O7- delta superconductors by second-harmonic generation with the use of femtosecond laser pulses. Phys Rev B Condens Matter 1993; 47:6086-6094. [PMID: 10004559 DOI: 10.1103/physrevb.47.6086] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
27
|
Reeves ME, Weaver BD, Krieger DA, Chrisey DB, Horwitz JS, Wolf SA, Summers GP. Magnetic-field dependence of critical currents in proton-irradiated YBa2Cu3O7- delta films: Conventional behavior of the pinning-force density. Phys Rev B Condens Matter 1992; 45:2585-2588. [PMID: 10001803 DOI: 10.1103/physrevb.45.2585] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
28
|
Jiang H, Widom A, Huang Y, Yuan T, Vittoria C, Chrisey DB, Horwitz JS. Quantum nucleation and thermal activation of vortex rings in high-Tc superconductors. Phys Rev B Condens Matter 1992; 45:3048-3053. [PMID: 10001856 DOI: 10.1103/physrevb.45.3048] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
29
|
Jiang H, Huang Y, How H, Zhang S, Vittoria C, Widom A, Chrisey DB, Horwitz JS, Lee R. Observation of ultrahigh critical current densities in high-Tc superconducting bridge constrictions. Phys Rev Lett 1991; 66:1785-1788. [PMID: 10043306 DOI: 10.1103/physrevlett.66.1785] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
30
|
Torrisi L, Coffa S, Foti G, Johnson RE, Chrisey DB, Boring JW. Threshold dependence in the electronic sputtering of condensed sulfur. Phys Rev B Condens Matter 1988; 38:1516-1519. [PMID: 9946416 DOI: 10.1103/physrevb.38.1516] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|