1
|
Patel H, Pavlichenko I, Grinthal A, Zhang CT, Alvarenga J, Kreder MJ, Weaver JC, Ji Q, Ling CWF, Choy J, Li Z, Black NL, Bispo PJM, Lewis JA, Kozin ED, Aizenberg J, Remenschneider AK. Design of medical tympanostomy conduits with selective fluid transport properties. Sci Transl Med 2023; 15:eadd9779. [PMID: 37018418 DOI: 10.1126/scitranslmed.add9779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Implantable tubes, shunts, and other medical conduits are crucial for treating a wide range of conditions from ears and eyes to brain and liver but often impose serious risks of device infection, obstruction, migration, unreliable function, and tissue damage. Efforts to alleviate these complications remain at an impasse because of fundamentally conflicting design requirements: Millimeter-scale size is required to minimize invasiveness but exacerbates occlusion and malfunction. Here, we present a rational design strategy that reconciles these trade-offs in an implantable tube that is even smaller than the current standard of care. Using tympanostomy tubes (ear tubes) as an exemplary case, we developed an iterative screening algorithm and show how unique curved lumen geometries of the liquid-infused conduit can be designed to co-optimize drug delivery, effusion drainage, water resistance, and biocontamination/ingrowth prevention in a single subcapillary-length-scale device. Through extensive in vitro studies, we demonstrate that the engineered tubes enabled selective uni- and bidirectional fluid transport; nearly eliminated adhesion and growth of common pathogenic bacteria, blood, and cells; and prevented tissue ingrowth. The engineered tubes also enabled complete eardrum healing and hearing preservation and exhibited more efficient and rapid antibiotic delivery to the middle ear in healthy chinchillas compared with current tympanostomy tubes, without resulting in ototoxicity at up to 24 weeks. The design principle and optimization algorithm presented here may enable tubes to be customized for a wide range of patient needs.
Collapse
Affiliation(s)
- Haritosh Patel
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Ida Pavlichenko
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Alison Grinthal
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
| | - Cathy T Zhang
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
| | - Jack Alvarenga
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Michael J Kreder
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
| | - James C Weaver
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Qin Ji
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Christopher W F Ling
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Joseph Choy
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Zihan Li
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Nicole L Black
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Paulo J M Bispo
- Department of Ophthalmology, Massachusetts Eye and Ear, Boston, MA 02114, USA
- Harvard Medical School, Harvard University, Boston, MA 02115, USA
| | - Jennifer A Lewis
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Elliott D Kozin
- Harvard Medical School, Harvard University, Boston, MA 02115, USA
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA 02114, USA
| | - Joanna Aizenberg
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Boston, MA 02134, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Aaron K Remenschneider
- Harvard Medical School, Harvard University, Boston, MA 02115, USA
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Boston, MA 02114, USA
| |
Collapse
|
2
|
Guarino VA, Blau A, Alvarenga J, Loscalzo J, Zhang YY. A crosslinked dextran sulfate-chitosan nanoparticle for delivery of therapeutic heparin-binding proteins. Int J Pharm 2021; 610:121287. [PMID: 34775044 DOI: 10.1016/j.ijpharm.2021.121287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 11/03/2021] [Accepted: 11/07/2021] [Indexed: 11/28/2022]
Abstract
Negatively charged dextran sulfate (DS)-chitosan nanoparticles (DSCS NPs) contain a DS outer shell with binding properties similar to those of heparin and are useful for the incorporation and delivery of therapeutic heparin-binding proteins. These particles, however, are unstable in physiological salt solutions due to their formation through electrostatic interactions. In the present study, a method was developed to covalently crosslink chitosan in the core of the DSCS NP with a short chain dicarboxylic acid (succinate), while leaving the outer shell of the particle untouched. The crosslinked particles, XDSCS NPs, are stable in NaCl solutions up to 3 M. XDSCS NPs were able to incorporate heparin-binding proteins (VEGF and SDF-1α) rapidly and efficiently, and maintain the full biological activity of the proteins. The incorporated proteins were not released from the particles after a 14-day incubation period at 37 °C in PBS, but retained the same activity as those stored at 4 °C. When aerosolized for delivery to the lungs of rats, XDSCS NP-incorporated SDF-1α showed a ∼17-fold greater retention time compared to that of free protein. These properties suggest that XDSCS NPs could be beneficial for the delivery of therapeutic heparin-binding proteins to achieve sustained in vivo effects.
Collapse
Affiliation(s)
- Victoria A Guarino
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Adam Blau
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Jack Alvarenga
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Allston, MA 02134, United States
| | - Joseph Loscalzo
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Ying-Yi Zhang
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States.
| |
Collapse
|
3
|
Shirman T, Toops TJ, Shirman E, Shneidman AV, Liu S, Gurkin K, Alvarenga J, Lewandowski MP, Aizenberg M, Aizenberg J. Raspberry colloid-templated approach for the synthesis of palladium-based oxidation catalysts with enhanced hydrothermal stability and low-temperature activity. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.03.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
4
|
Adera S, Alvarenga J, Shneidman AV, Zhang CT, Davitt A, Aizenberg J. Depletion of Lubricant from Nanostructured Oil-Infused Surfaces by Pendant Condensate Droplets. ACS Nano 2020; 14:8024-8035. [PMID: 32490664 DOI: 10.1021/acsnano.9b10184] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Due to recent advances in nanofabrication, phase-change condensation heat transfer has seen a renaissance. Compared to conventional heat transfer surfaces, nanostructured surfaces impregnated with chemically matched lubrication films (hereinafter referred to as "nanostructured lubricated surfaces") have been demonstrated to improve vapor-side phase-change condensation heat transfer by facilitating droplet nucleation, growth, and departure. While the presence of nanoscale roughness improves performance longevity by stabilizing the lubrication film via capillary forces, such enhancement is short-lived due to the eventual loss of lubrication oil by the departing droplets. The objective of this study is to characterize oil depletion caused by pendant droplets during condensation. For our study, we nanostructured, chemically functionalized, and lubricated horizontal copper tubes that are widely used in shell-and-tube heat exchangers in power plants and process industries. Using high-speed fluorescence imaging and thermogravimetric analysis, we show that shedding droplets exert a shear force on the oil in the wetting ridge at the water-oil interface. The viscous shear draws the lubrication film from the nanostructured surface onto the upper portion of the droplet and forms a ring-like oil skirt. Through detailed theoretical analysis, we show that the thickness of this oil skirt scales with the classical Landau-Levich-Derjaguin (LLD) theory for dip-coating. Our results reveal that droplets falling from horizontal tubes break unequally and leave behind small satellite droplets that retain the bulk of the oil in the wetting ridge. This observation is in stark contrast with the earlier description of droplets shedding from tilted flat plates where the entire oil-filled wetting ridge is demonstrated to leave the surface upon droplet departure. By selecting lubrication oils of varying viscosity and spreading coefficient, we provide evidence that the contribution of the wrapping layer to the rate of oil depletion is insignificant. Furthermore, we show that due to the nanoscale features on the tubes, nearly half of the lubrication film remains on the surface after 10 h of continuous steam condensation at ambient pressure, 23 °C, and 60% relative humidity, a 2-3-fold improvement over previous results.The insights gained from this work will provide guidelines for the rational design of long-lasting nanostructured lubricated surfaces for phase-change condensation.
Collapse
Affiliation(s)
- Solomon Adera
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jack Alvarenga
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Anna V Shneidman
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Cathy T Zhang
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Alana Davitt
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Joanna Aizenberg
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, United States
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
5
|
Paink GK, Kolle S, Le D, Weaver JC, Alvarenga J, Ahanotu O, Aizenberg J, Kim P. Dynamic Self-Repairing Hybrid Liquid-in-Solid Protective Barrier for Cementitious Materials. ACS Appl Mater Interfaces 2020; 12:31922-31932. [PMID: 32531149 DOI: 10.1021/acsami.0c06357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Corrosion and surface fouling of structural materials, such as concrete, are persistent problems accelerating undesirable material degradation for many industries and infrastructures. To counteract these detrimental effects, protective coatings are frequently applied, but these solid-based coatings can degrade or become mechanically damaged over time. Such irreversible and irreparable damage on solid-based protective coatings expose underlying surfaces and bulk materials to adverse environmental stresses leading to subsequent fouling and degradation. We introduce a new concept of a hybrid liquid-in-solid protective barrier (LIB) to overcome the limitations of traditional protective coatings with broad applicability to structural materials. Through optimization of capillary forces and reduction of the interfacial energy between an upper mobile liquid and a lower immobile solid phase, a stable liquid-based protective layer is created. This provides a persistent self-repairing barrier against the infiltration of moisture and salt, in addition to omniphobic surface properties. As a model experimental test bed, we applied this concept to cementitious materials, which are commonly used as binders in concrete, and investigated how the mobile liquid phase embedded within a porous solid support contributes to the material's barrier protection and antifouling properties. Using industry standard test methods for acid resistance, chloride-ion penetrability, freeze-thaw cyclability, and mechanical durability, we demonstrate that LIBs exhibit significantly reduced water absorption and ion penetrability, improved repellency against various nonaqueous liquids, and resistance to corrosion while maintaining their required mechanical performance as structural materials.
Collapse
Affiliation(s)
- Gurminder K Paink
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Stefan Kolle
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Duy Le
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - James C Weaver
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Jack Alvarenga
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Onyemaechi Ahanotu
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Joanna Aizenberg
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
- Department of Chemistry and Chemical Biology, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Philseok Kim
- Wyss Institute for Biologically Inspired Engineering, Harvard University, 58 Oxford Street, Cambridge, Massachusetts 02138, United States
| |
Collapse
|
6
|
Abstract
The development of liquid gating membrane (LGM) systems with tunable multiphase selectivity and antifouling properties is limited by the mechanical stability of the membrane materials. The mechanical integrity of most polymeric membranes can be compromised by deformation under harsh operating conditions (elevated temperatures, corrosive environments, foulants, etc.), ultimately leading to their failure. Here, a facile electrochemical approach to the fabrication of multifunctional metal-based liquid gating membrane systems is presented. The membrane porosity, pore size, and membrane surface roughness can be tuned from micro- to nanometer scale, enabling function under a variety of operating conditions. The prepared LGMs demonstrate controllable gas-liquid selectivity, superior resistance to corrosive conditions and fouling chemicals, and significant reduction of the transmembrane pressure required for the separation process, resulting in lower energy consumption. The stability of the gating liquid is confirmed experimentally through sustained fouling resistance and further supported by the interfacial energy calculations. The mechanically robust metal-based membrane systems reported in this study significantly extend the operating range of LGMs, prompting their applications in water treatment processes such as wastewater treatment, degassing, and multiphase separation.
Collapse
Affiliation(s)
- Alexander B Tesler
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces , Xiamen University , Xiamen 361005 , China
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
- Wyss Institute for Biologically Inspired Engineering , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Zhizhi Sheng
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces , Xiamen University , Xiamen 361005 , China
| | - Wei Lv
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Materials Research, Jiujiang Research Institute, College of Physical Science and Technology , Xiamen University , Xiamen 361005 , China
| | - Yi Fan
- College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surfaces , Xiamen University , Xiamen 361005 , China
| | - David Fricke
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Kyoo-Chul Park
- Department of Mechanical Engineering , Northwestern University , Evanston , Illinois 60208 , United States
| | - Jack Alvarenga
- Wyss Institute for Biologically Inspired Engineering , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Joanna Aizenberg
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
- Wyss Institute for Biologically Inspired Engineering , Harvard University , Cambridge , Massachusetts 02138 , United States
- Kavli Institute for Bionano Science and Technology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Xu Hou
- College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces , Xiamen University , Xiamen 361005 , China
- Department of Physics, Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Materials Research, Jiujiang Research Institute, College of Physical Science and Technology , Xiamen University , Xiamen 361005 , China
| |
Collapse
|
7
|
Wu F, Chen S, Chen B, Wang M, Min L, Alvarenga J, Ju J, Khademhosseini A, Yao Y, Zhang YS, Aizenberg J, Hou X. Bioinspired Universal Flexible Elastomer-Based Microchannels. Small 2018; 14:e1702170. [PMID: 29325208 DOI: 10.1002/smll.201702170] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/27/2017] [Indexed: 06/07/2023]
Abstract
Flexible and stretchable microscale fluidic devices have a broad range of potential applications, ranging from electronic wearable devices for convenient digital lifestyle to biomedical devices. However, simple ways to achieve stable flexible and stretchable fluidic microchannels with dynamic liquid transport have been challenging because every application for elastomeric microchannels is restricted by their complex fabrication process and limited material selection. Here, a universal strategy for building microfluidic devices that possess exceptionally stable and stretching properties is shown. The devices exhibit superior mechanical deformability, including high strain (967%) and recovery ability, where applications as both strain sensor and pressure-flow regulating device are demonstrated. Various microchannels are combined with organic, inorganic, and metallic materials as stable composite microfluidics. Furthermore, with surface chemical modification these stretchable microfluidic devices can also obtain antifouling property to suit for a broad range of industrial and biomedical applications.
Collapse
Affiliation(s)
- Feng Wu
- Bionic and Soft Matter Research Institute, College of Physical Science and Technology, Xiamen University, 361005, Xiamen, China
| | - Songyue Chen
- Department of Mechanical and Electrical Engineering, Xiamen University, 361005, Xiamen, China
| | - Baiyi Chen
- College of Chemistry and Chemical Engineering, and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Laboratory of Physical Chemistry of Solid Surfaces, and Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, 361005, Xiamen, China
| | - Miao Wang
- Bionic and Soft Matter Research Institute, College of Physical Science and Technology, Xiamen University, 361005, Xiamen, China
| | - Lingli Min
- College of Chemistry and Chemical Engineering, and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Laboratory of Physical Chemistry of Solid Surfaces, and Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, 361005, Xiamen, China
| | - Jack Alvarenga
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
| | - Jie Ju
- Biomaterials Innovation Research Center, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Ali Khademhosseini
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
- Biomaterials Innovation Research Center, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Yuxing Yao
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Yu Shrike Zhang
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
- Biomaterials Innovation Research Center, Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Joanna Aizenberg
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Xu Hou
- Bionic and Soft Matter Research Institute, College of Physical Science and Technology, Xiamen University, 361005, Xiamen, China
- College of Chemistry and Chemical Engineering, and Collaborative Innovation Center of Chemistry for Energy Materials, and State Key Laboratory of Physical Chemistry of Solid Surfaces, and Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, 361005, Xiamen, China
| |
Collapse
|
8
|
Howell C, Vu TL, Lin JJ, Kolle S, Juthani N, Watson E, Weaver JC, Alvarenga J, Aizenberg J. Self-replenishing vascularized fouling-release surfaces. ACS Appl Mater Interfaces 2014; 6:13299-307. [PMID: 25006681 DOI: 10.1021/am503150y] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Inspired by the long-term effectiveness of living antifouling materials, we have developed a method for the self-replenishment of synthetic biofouling-release surfaces. These surfaces are created by either molding or directly embedding 3D vascular systems into polydimethylsiloxane (PDMS) and filling them with a silicone oil to generate a nontoxic oil-infused material. When replenished with silicone oil from an outside source, these materials are capable of self-lubrication and continuous renewal of the interfacial fouling-release layer. Under accelerated lubricant loss conditions, fully infused vascularized samples retained significantly more lubricant than equivalent nonvascularized controls. Tests of lubricant-infused PDMS in static cultures of the infectious bacteria Staphylococcus aureus and Escherichia coli as well as the green microalgae Botryococcus braunii, Chlamydomonas reinhardtii, Dunaliella salina, and Nannochloropsis oculata showed a significant reduction in biofilm adhesion compared to PDMS and glass controls containing no lubricant. Further experiments on vascularized versus nonvascularized samples that had been subjected to accelerated lubricant evaporation conditions for up to 48 h showed significantly less biofilm adherence on the vascularized surfaces. These results demonstrate the ability of an embedded lubricant-filled vascular network to improve the longevity of fouling-release surfaces.
Collapse
Affiliation(s)
- Caitlin Howell
- Wyss Institute for Biologically Inspired Engineering , 60 Oxford Street, Cambridge, Massachusetts 02138, United States
| | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Yao X, Dunn SS, Kim P, Duffy M, Alvarenga J, Aizenberg J. Fluorogel Elastomers with Tunable Transparency, Elasticity, Shape-Memory, and Antifouling Properties. Angew Chem Int Ed Engl 2014; 53:4418-22. [DOI: 10.1002/anie.201310385] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 01/12/2014] [Indexed: 01/13/2023]
|
10
|
Yao X, Dunn SS, Kim P, Duffy M, Alvarenga J, Aizenberg J. Fluorogel Elastomers with Tunable Transparency, Elasticity, Shape-Memory, and Antifouling Properties. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310385] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
11
|
Kim P, Kreder MJ, Alvarenga J, Aizenberg J. Hierarchical or not? Effect of the length scale and hierarchy of the surface roughness on omniphobicity of lubricant-infused substrates. Nano Lett 2013; 13:1793-9. [PMID: 23464578 DOI: 10.1021/nl4003969] [Citation(s) in RCA: 212] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Lubricant-infused textured solid substrates are gaining remarkable interest as a new class of omni-repellent nonfouling materials and surface coatings. We investigated the effect of the length scale and hierarchy of the surface topography of the underlying substrates on their ability to retain the lubricant under high shear conditions, which is important for maintaining nonwetting properties under application-relevant conditions. By comparing the lubricant loss, contact angle hysteresis, and sliding angles for water and ethanol droplets on flat, microscale, nanoscale, and hierarchically textured surfaces subjected to various spinning rates (from 100 to 10,000 rpm), we show that lubricant-infused textured surfaces with uniform nanofeatures provide the most shear-tolerant liquid-repellent behavior, unlike lotus leaf-inspired superhydrophobic surfaces, which generally favor hierarchical structures for improved pressure stability and low contact angle hysteresis. On the basis of these findings, we present generalized, low-cost, and scalable methods to manufacture uniform or regionally patterned nanotextured coatings on arbitrary materials and complex shapes. After functionalization and lubrication, these coatings show robust, shear-tolerant omniphobic behavior, transparency, and nonfouling properties against highly contaminating media.
Collapse
Affiliation(s)
- Philseok Kim
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts, United States.
| | | | | | | |
Collapse
|
12
|
Wilson PW, Lu W, Xu H, Kim P, Kreder MJ, Alvarenga J, Aizenberg J. Inhibition of ice nucleation by slippery liquid-infused porous surfaces (SLIPS). Phys Chem Chem Phys 2013. [DOI: 10.1039/c2cp43586a] [Citation(s) in RCA: 248] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
13
|
Wang W, Burgess IB, Hatton BD, Alvarenga J, Aizenberg J. Secrets revealed — Spatially selective wetting of plasma-patterned periodic mesoporous organosilica. CAN J CHEM 2012. [DOI: 10.1139/v2012-092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report a simple method to pattern wetting properties on thin films of periodic mesoporous organosilica (PMO). A hydrophobic methane PMO thin film was covered by masks and exposed to oxygen plasma to make the unmasked area hydrophilic. The wettability patterns could be revealed only when the films were immersed in water or exposed to moisture. We expect that our method would extend the utility of PMO to such areas as sensing and information security.
Collapse
Affiliation(s)
- Wendong Wang
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Ian B. Burgess
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Benjamin D. Hatton
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Jack Alvarenga
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
| | - Joanna Aizenberg
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138, USA
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
- Kavli Institute for Bionano Science & Technology, Harvard University, Cambridge, MA 02138, USA
| |
Collapse
|
14
|
Kim P, Wong TS, Alvarenga J, Kreder MJ, Adorno-Martinez WE, Aizenberg J. Liquid-infused nanostructured surfaces with extreme anti-ice and anti-frost performance. ACS Nano 2012; 6:6569-77. [PMID: 22680067 DOI: 10.1021/nn302310q] [Citation(s) in RCA: 509] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Ice-repellent coatings can have significant impact on global energy savings and improving safety in many infrastructures, transportation, and cooling systems. Recent efforts for developing ice-phobic surfaces have been mostly devoted to utilizing lotus-leaf-inspired superhydrophobic surfaces, yet these surfaces fail in high-humidity conditions due to water condensation and frost formation and even lead to increased ice adhesion due to a large surface area. We report a radically different type of ice-repellent material based on slippery, liquid-infused porous surfaces (SLIPS), where a stable, ultrasmooth, low-hysteresis lubricant overlayer is maintained by infusing a water-immiscible liquid into a nanostructured surface chemically functionalized to have a high affinity to the infiltrated liquid and lock it in place. We develop a direct fabrication method of SLIPS on industrially relevant metals, particularly aluminum, one of the most widely used lightweight structural materials. We demonstrate that SLIPS-coated Al surfaces not only suppress ice/frost accretion by effectively removing condensed moisture but also exhibit at least an order of magnitude lower ice adhesion than state-of-the-art materials. On the basis of a theoretical analysis followed by extensive icing/deicing experiments, we discuss special advantages of SLIPS as ice-repellent surfaces: highly reduced sliding droplet sizes resulting from the extremely low contact angle hysteresis. We show that our surfaces remain essentially frost-free in which any conventional materials accumulate ice. These results indicate that SLIPS is a promising candidate for developing robust anti-icing materials for broad applications, such as refrigeration, aviation, roofs, wires, outdoor signs, railings, and wind turbines.
Collapse
Affiliation(s)
- Philseok Kim
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02138, USA
| | | | | | | | | | | |
Collapse
|
15
|
Jarosz P, Schauerman C, Alvarenga J, Moses B, Mastrangelo T, Raffaelle R, Ridgley R, Landi B. Carbon nanotube wires and cables: near-term applications and future perspectives. Nanoscale 2011; 3:4542-53. [PMID: 21984338 DOI: 10.1039/c1nr10814j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Wires and cables are essential to modern society, and opportunities exist to develop new materials with reduced resistance, mass, and/or susceptibility to fatigue. This article describes how carbon nanotubes (CNTs) offer opportunities for integration into wires and cables for both power and data transmission due to their unique physical and electronic properties. Macroscopic CNT wires and ribbons are presently shown as viable replacements for metallic conductors in lab-scale demonstrations of coaxial, USB, and Ethernet cables. In certain applications, such as the outer conductor of a coaxial cable, CNT materials may be positioned to displace metals to achieve substantial benefits (e.g. reduction in cable mass per unit length (mass/length) up to 50% in some cases). Bulk CNT materials possess several unique properties which may offer advantages over metallic conductors, such as flexure tolerance and environmental stability. Specifically, CNT wires were observed to withstand greater than 200,000 bending cycles without increasing resistivity. Additionally, CNT wires exhibit no increase in resistivity after 80 days in a corrosive environment (1 M HCl), and little change in resistivity with temperature (<1% from 170-330 K). This performance is superior to conventional metal wires and truly novel for a wiring material. However, for CNTs to serve as a full replacement for metals, the electrical conductivity of CNT materials must be improved. Recently, the conductivity of a CNT wire prepared through simultaneous densification and doping has exceeded 1.3 × 10(6) S/m. This level of conductivity brings CNTs closer to copper (5.8 × 10(7) S/m) and competitive with some metals (e.g. gold) on a mass-normalized basis. Developments in manipulation of CNT materials (e.g. type enrichment, doping, alignment, and densification) have shown progress towards this goal. In parallel with efforts to improve bulk conductivity, integration of CNT materials into cabling architectures will require development in electrical contacting. Several methods for contacting bulk CNT materials to metals are demonstrated, including mechanical crimping and ultrasonic bonding, along with a method for reducing contact resistance by tailoring the CNT-metal interface via electroless plating. Collectively, these results summarize recent progress in CNT wiring technologies and illustrate that nanoscale conductors may become a disruptive technology in cabling designs.
Collapse
Affiliation(s)
- Paul Jarosz
- Chemical & Biomedical Engineering, Rochester Institute of Technology, 160 Lomb Memorial Drive, Rochester, NY 14623, USA
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Zoppa A, Alvarenga J, Cruz R, Machado T, Silva L. Toracoscopia aplicada à ressecção de fragmento pulmonar com o auxílio de sutura mecânica em eqüinos. ARQ BRAS MED VET ZOO 2008. [DOI: 10.1590/s0102-09352008000300006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Este trabalho visou à ressecção de fragmento dorsocaudal do lobo pulmonar caudal esquerdo com o auxílio de sutura mecânica por via toracoscópica. Foram utilizados 10 eqüinos clinicamente sadios, os quais foram sedados e mantidos em estação. O procedimento foi realizado no hemitórax esquerdo, por três acessos previamente programados: o primeiro acesso foi no 12º espaço intercostal (EIC), o segundo no 14º, 15º ou 16º EIC e o terceiro no 14º ou 15º EIC, conforme a necessidade de posicionamento dos instrumentos. Em todos os animais foi possível controlar o pneumotórax, sendo observada evolução clínica satisfatória durante o período pós-operatório, exceto em um animal. Os resultados obtidos indicam que, por meio da videotoracoscopia, pode-se realizar ressecção pulmonar parcial com uso de sutura mecânica em eqüinos e seu emprego na rotina hospitalar poderá contribuir para melhor compreensão e controle de enfermidades sediadas na cavidade torácica.
Collapse
|
17
|
Alvarenga J, Iwasaki M, Matera JM, Stopiglia AJ, Barros PS. Separation of proximal tibial epiphysis in a dog. Mod Vet Pract 1984; 65:224-5. [PMID: 6727858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
18
|
Alvarenga J, Matera JM, Barros PS, Randi RE, Sterman F. Dioctophyma renale in a dog. Mod Vet Pract 1984; 65:125. [PMID: 6233483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|
19
|
Barros M, Matera JM, Alvarenga J, Iwasaki M. Orbital pneumatosis in a dog. Mod Vet Pract 1984; 65:38. [PMID: 6727835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
20
|
Alvarenga J, Spicciati W, Iwasaki M. Surgical removal of multiple urinary calculi. Mod Vet Pract 1975; 56:481. [PMID: 1143270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
21
|
Alvarenga J, Spicciati W. Tracheal rupture in a dog. Mod Vet Pract 1975; 56:337. [PMID: 1134494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
22
|
Alvarenga J, Hagiwara MK, De Martin BW. Umbilical hernia in a cat. Mod Vet Pract 1975; 56:260-1. [PMID: 1124072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
23
|
Alvarenga J. Patellar fracture in the dog. Mod Vet Pract 1973; 54:43-4. [PMID: 4714602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|