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Du T, Liu J, Dong J, Xie H, Wang X, Yang X, Yang Y. Multifunctional coatings of nickel-titanium implant toward promote osseointegration after operation of bone tumor and clinical application: a review. Front Bioeng Biotechnol 2024; 12:1325707. [PMID: 38444648 PMCID: PMC10912669 DOI: 10.3389/fbioe.2024.1325707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 01/29/2024] [Indexed: 03/07/2024] Open
Abstract
Metal implants, especially Ni-Ti shape memory alloy (Ni-Ti SMA) implants, have increasingly become the first choice for fracture and massive bone defects after orthopedic bone tumor surgery. In this paper, the internal composition and shape memory properties of Ni-Ti shape memory alloy were studied. In addition, the effects of porous Ni-Ti SMA on osseointegration, and the effects of surface hydrophobicity and hydrophilicity on the osseointegration of Ni-Ti implants were also investigated. In addition, the effect of surface coating modification technology of Ni-Ti shape memory alloy on bone bonding was also studied. Several kinds of Ni-Ti alloy implants commonly used in orthopedic clinic and their advantages and disadvantages were introduced. The surface changes of Ni-Ti alloy implants promote bone fusion, enhance the adhesion of red blood cells and platelets, promote local tissue regeneration and fracture healing. In the field of orthopaedics, the use of Ni-Ti shape memory alloy implants significantly promoted clinical development. Due to the introduction of the coating, the osseointegration and biocompatibility of the implant surface have been enhanced, and the success rate of the implant has been greatly improved.
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Affiliation(s)
- Tianhao Du
- Department of Rehabilitation Medicine, General Hospital of Northern Theater Command, Shenyang, China
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Jia Liu
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Jinhan Dong
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Haoxu Xie
- Department of Rehabilitation Medicine, General Hospital of Northern Theater Command, Shenyang, China
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Xiao Wang
- Department of Rehabilitation Medicine, General Hospital of Northern Theater Command, Shenyang, China
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Xu Yang
- Liaoning University of traditional Chinese Medicine, Shenyang, China
| | - Yingxin Yang
- Liaoning University of traditional Chinese Medicine, Shenyang, China
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2
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Wynne KJ, Zolotarskaya O, Jarrell R, Wang C, Amin Y, Brunson K. Facile Modification of Medical-Grade Silicone for Antimicrobial Effectiveness and Biocompatibility: A Potential Therapeutic Strategy against Bacterial Biofilms. ACS APPLIED MATERIALS & INTERFACES 2023; 15:46626-46638. [PMID: 37782835 DOI: 10.1021/acsami.3c08734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
A one-step modification of biomedical silicone tubing with N,N-dimethyltetradecylamine, C14, results in a composition designated WinGard-1 (WG-1, 1.1 wt % C14). A surface-active silicon-amine phase (SAP) is proposed to account for increased wettability and increased surface charge. To understand the mechanism of antimicrobial effectiveness, several procedures were employed to detect whether C14 leaching occurred. An immersion-growth (IG) test was developed that required knowing the bacterial Minimum Inhibitory Concentrations (MICs) and Minimum Biocidal Concentrations (MBCs). The C14 MIC and MBC for Gm- uropathogenic E. coli (UPEC), commonly associated with catheter-associated urinary tract infections (CAUTI), were 10 and 20 μg/mL, respectively. After prior immersion of WG-1 silicone segments in a growth medium from 1 to 28 d, the IG test for the medium showed normal growth for UPEC over 24 h, indicating that the concentration of C14 must be less than the MIC, 10 μg/mL. GC-MS and studies of the medium inside and outside a dialysis bag containing WG-1 silicone segments supported de minimis leaching. Consequently, a 5 log UPEC reduction (99.999% kill) in 24 h using the shake flask test (ASTM E2149) cannot be due to leaching and is ascribed to contact kill. Interestingly, although the MBC was greater than 100 μg/mL for Pseudomonas aeruginosa, WG-1 silicone affected an 80% reduction via a 24 h shake flask test. For other bacteria and Candida albicans, greater than 99.9% shake flask kill may be understood by proposing increased wettability and concentration of charge illustrated in the TOC. De minimis leaching places WG-1 silicone at an advantage over conventional anti-infectives that rely on leaching of an antibiotic or heavy metals such as silver. The facile process for preparation of WG-1 silicone combined with biocidal effectiveness comprises progress toward the goals of device designation from the FDA for WG-1 and clearance.
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Affiliation(s)
- Kenneth J Wynne
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
| | - Olga Zolotarskaya
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
| | - Rebecca Jarrell
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
| | - Chenyu Wang
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
| | - Youssef Amin
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
| | - Kennard Brunson
- Virginia Bio+Tech Park, WynnVision LLC, Suite 57 800 East Leigh Street Richmond, Virginia 23219-1551, United States
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3
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Durďáková TM, Hrdlička Z, Král M, Hovorka Š, Vögele A, Eichler R, Trtik P, Vopička O. Radiation softening and hardening of PDMS in combined neutron and γ rays. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Peculiar encounter between self-propelled droplet and static droplet: swallow, rerouting, and recoil. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mechanically Switchable Wetting Petal Effect in Self-Patterned Nanocolumnar Films on Poly(dimethylsiloxane). NANOMATERIALS 2021; 11:nano11102566. [PMID: 34685004 PMCID: PMC8538580 DOI: 10.3390/nano11102566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/21/2021] [Accepted: 09/23/2021] [Indexed: 12/28/2022]
Abstract
Switchable mechanically induced changes in the wetting behavior of surfaces are of paramount importance for advanced microfluidic, self-cleaning and biomedical applications. In this work we show that the well-known polydimethylsiloxane (PDMS) elastomer develops self-patterning when it is coated with nanostructured TiO2 films prepared by physical vapor deposition at glancing angles and subsequently subjected to a mechanical deformation. Thus, unlike the disordered wrinkled surfaces typically created by deformation of the bare elastomer, well-ordered and aligned micro-scaled grooves form on TiO2/PDMS after the first post-deposition bending or stretching event. These regularly patterned surfaces can be reversibly modified by mechanical deformation, thereby inducing a switchable and reversible wetting petal effect and the sliding of liquid droplets. When performed in a dynamic way, this mechanical actuation produces a unique capacity of liquid droplets (water and diiodomethane) transport and tweezing, this latter through their selective capture and release depending on their volume and chemical characteristics. Scanning electron and atomic force microscopy studies of the strained samples showed that a dual-scale roughness, a parallel alignment of patterned grooves and their reversible widening upon deformation, are critical factors controlling this singular sliding behavior and the possibility to tailor their response by the appropriate manufacturing of surface structures.
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Fatona A, Osamudiamen A, Moran‐Mirabal J, Brook MA. Rapid, catalyst‐free crosslinking of silicones using triazines. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ayodele Fatona
- Department of Chemistry and Chemical BiologyMcMaster University 1280 Main St. W., Hamilton Ontario L8S 4M1 Canada
| | - Andrew Osamudiamen
- Department of Chemistry and Chemical BiologyMcMaster University 1280 Main St. W., Hamilton Ontario L8S 4M1 Canada
| | - Jose Moran‐Mirabal
- Department of Chemistry and Chemical BiologyMcMaster University 1280 Main St. W., Hamilton Ontario L8S 4M1 Canada
| | - Michael A. Brook
- Department of Chemistry and Chemical BiologyMcMaster University 1280 Main St. W., Hamilton Ontario L8S 4M1 Canada
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Zhang Q, Dong J, Peng M, Yang Z, Wan Y, Yao F, Zhou J, Ouyang C, Deng X, Luo H. Laser-induced wettability gradient surface on NiTi alloy for improved hemocompatibility and flow resistance. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110847. [DOI: 10.1016/j.msec.2020.110847] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/05/2020] [Accepted: 03/12/2020] [Indexed: 12/11/2022]
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8
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Ngo BKD, Barry ME, Lim KK, Johnson JC, Luna DJ, Pandian NK, Jain A, Grunlan MA. Thromboresistance of Silicones Modified with PEO-Silane Amphiphiles. ACS Biomater Sci Eng 2020; 6:2029-2037. [DOI: 10.1021/acsbiomaterials.0c00011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Bryan Khai D. Ngo
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Mikayla E. Barry
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kendrick K. Lim
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Jessica C. Johnson
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - David J. Luna
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Navaneeth K.R. Pandian
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Abhishek Jain
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Melissa A. Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Materials Science & Engineering, Texas A&M University, College Station, Texas 77843, United States
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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9
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Liu Y, Wang C, Jarrell RM, Nair S, Wynne KJ, Di D. Icephobic, Pt-Cured, Polydimethylsiloxane Nanocomposite Coatings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:11180-11189. [PMID: 32011843 DOI: 10.1021/acsami.9b20989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
To explore novel coatings with potential for easy release of ice (icephobicity), a series of platinum-cured silicone coatings was prepared incorporating SYL-OFF 7210, designated MQ-R, as a nanoscale reinforcing component. These optically transparent coatings are designated according to cure temperature and MQ-R wt %, for example, Pt-PDMS(25)-20 for 25 °C cure and 20 wt % MQ-R. Surface characterization included dynamic contact angles and morphology by atomic force microscopy. Bulk characterization was accomplished with stress-strain measurements at 25 °C and dynamic mechanical analysis from -110 to 150 °C. Ice adhesion tests at -10 °C showed modulus had a dominant effect in increasing τice, the peak removal force. At -30 °C, storage modulus was greater for coatings cured at 100 °C compared to 25 °C, but ice removal tests at -30 °C (-22 °F) consistently showed τice for Pt-PDMS(100) MQ-R compositions was less than τice for corresponding Pt-PDMS(25) coatings. This unexpected result was explained by proposing that supercooled water at hydrophilic interfacial sites (-10 °C) does not impede ice removal but frozen water pins ice at -30 °C. Interestingly, MQ-R was found to be a reactive filler that increased modulus after 100 °C cure especially for Pt-PDMS(100)-30 (3 MPa) and Pt-PDMS(100)-40 (5 MPa). In summary, by virtue of resistance to ice adhesion Pt(PDMS) coatings with low MQ-R content have potential for conferring energy savings and safety while high MQ-R content results in noteworthy mechanical properties.
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Affiliation(s)
- Yongfeng Liu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, People's Republic of China
- Department of Chemical and Life Science Engineering, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284, United States
- Center of Resource Chemical and New Material, 36 Jinshui Road, Qingdao 266100, People's Republic of China
| | - Chenyu Wang
- Department of Chemical and Life Science Engineering, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284, United States
| | - Rebecca M Jarrell
- Department of Chemical and Life Science Engineering, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284, United States
| | - Sithara Nair
- Department of Chemical and Life Science Engineering, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284, United States
| | - Kenneth J Wynne
- Department of Chemical and Life Science Engineering, School of Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, Virginia 23284, United States
| | - Duolong Di
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, People's Republic of China
- Center of Resource Chemical and New Material, 36 Jinshui Road, Qingdao 266100, People's Republic of China
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10
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Facile One-Step Method to Fabricate a Slippery Lubricant-Infused Surface (LIS) with Self-Replenishment Properties for Anti-Icing Applications. COATINGS 2020. [DOI: 10.3390/coatings10020119] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this work, a slippery lubricant-infused surface (LIS) was prepared by simple one-step mixing of polydimethylsiloxane (PDMS) resin and dimethyl silicone oil (PMX-200) directly. Silicone oil showed good compatibility with PDMS resin, and the added amount of silicone oil had no significant effect on the surface morphology of LIS. According to the results of surface observations, once the silicone oil film anchored on the LIS was removed, the silicone oil inside the PDMS polymer automatically diffused to the surface and formed a new silicone oil film again in a short time. Furthermore, with the increase of silicone oil content, the oil self-replenishment speed and amount of the LIS were enhanced, which also promoted a decrease of the surface water sliding angle and the improvement of the lubrication ability of the LIS. In the icing/deicing cycle tests, the slippery LIS still maintained very low ice adhesion strength after 24 cycles, showing excellent anti-icing performance.
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11
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Mitsui H, Mukai K, Ikubo S, Suzuki T, Minami H. Preparation of free‐standing silicone particles in aqueous heterogeneous system. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hiroki Mitsui
- Department of Chemical Science and Engineering, Graduate School of EngineeringKobe University Kobe 657‐8501 Japan
| | - Ken Mukai
- Department of Chemical Science and Engineering, Graduate School of EngineeringKobe University Kobe 657‐8501 Japan
| | - Satoshi Ikubo
- Department of Chemical Science and Engineering, Graduate School of EngineeringKobe University Kobe 657‐8501 Japan
| | - Toyoko Suzuki
- Department of Chemical Science and Engineering, Graduate School of EngineeringKobe University Kobe 657‐8501 Japan
| | - Hideto Minami
- Department of Chemical Science and Engineering, Graduate School of EngineeringKobe University Kobe 657‐8501 Japan
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12
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Bandyopadhyay S, Sriram SM, Parihar V, Das Gupta S, Mukherjee R, Chakraborty S. Tunable adhesion and slip on a bio-mimetic sticky soft surface. SOFT MATTER 2019; 15:9031-9040. [PMID: 31637378 DOI: 10.1039/c9sm01680e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Simultaneous tuning of wettability and adhesion of a surface requires intricate procedures for altering the interfacial structures. Here, we present a simple method for preparing a stable slippery surface, with an intrinsic capability of varying its adhesion characteristics. Cross-linked PDMS, an inherent hydrophobic material commonly used for microfluidic applications, is used to replicate the structures on the surface of a rose petal which acts as a high adhesion solid base and is subsequently oleoplaned with silicone oil. Our results demonstrate that the complex hierarchical rose petal structures can arrest dewetting of the silicone oil on the cross linked PDMS base by anchoring the oil film strongly even under flow. Further, by tuning the extent of submergence of the rose petal structures with silicone oil, we could alter the adhesion characteristics of the surface on demand, while retaining its slippery characteristics for a wide range of the pertinent parameters. We have also demonstrated the possible fabrication of gradient adhesion surfaces. This, in turn, may find a wide variety of applications in water harvesting, droplet maneuverability and no-loss transportation in resource-limited settings.
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Affiliation(s)
- Saumyadwip Bandyopadhyay
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, 721 302, West Bengal, India.
| | - S M Sriram
- Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal 575025, Karnataka, India
| | - Vartika Parihar
- Instability & Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, 721302, West Bengal, India.
| | - Sunando Das Gupta
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, 721 302, West Bengal, India. and Instability & Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, 721302, West Bengal, India.
| | - Rabibrata Mukherjee
- Instability & Soft Patterning Laboratory, Department of Chemical Engineering, Indian Institute of Technology Kharagpur, 721302, West Bengal, India.
| | - Suman Chakraborty
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, 721 302, West Bengal, India. and Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, 721302, West Bengal, India
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Wang C, Zolotarskaya O, Ashraf KM, Wen X, Ohman DE, Wynne KJ. Surface Characterization, Antimicrobial Effectiveness, and Human Cell Response for a Biomedical Grade Polyurethane Blended with a Mixed Soft Block PTMO-Quat/PEG Copolyoxetane Polyurethane. ACS APPLIED MATERIALS & INTERFACES 2019; 11:20699-20714. [PMID: 31117452 DOI: 10.1021/acsami.9b04697] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Infection is a serious medical complication associated with health care environments. Despite advances, the 5-10% incidence of infections for hospital patients is well documented. Sources of pathogenic organisms include medical devices such as catheters and endotracheal tubes. Offering guidance for curbing the spread of such infections, a model antimicrobial coating is described herein that kills bacteria on contact but is compatible with human cells. To achieve these characteristics, a novel blend of a conventional biomedical grade polyurethane (Tecoflex) with mixed soft block polyurethane is described. The functional polyurethane (UP-C12-50-T) has a copolyoxetane soft block P-C12-50 with quaternary ammonium (C12) and PEG-like side chains and a conventional poly(tetramethylene oxide) (PTMO, T) soft block. DSC and DMA data point to limited miscibility of UP-C12-50-T with Tecoflex. The blend of Tecoflex with 10 wt % UP-C12-50-T designated UP-C12-50-T-10 radically changed surface properties. Evidence for surface concentration of the P-C12-50 soft block was obtained by atomic force microscopy (AFM), dynamic contact angles (DCAs), zeta potentials (ζ), and X-ray photoelectron spectroscopy (XPS). The antimicrobial effectiveness of the blend coatings was established by the ASTM E2149 "shake flask" test for challenges of E. coli and a methicillin resistant strain of S. epidermidis. Cytocompatibility was demonstrated with an in vitro test designed for direct contact (ISO 10993-5). Growth of human mesenchymal stem cells (MSCs) beside and under UP-C12-50-T-10 indicated remarkable biocompatibility for a composition that is also strongly antimicrobial. Overall, the results point to a model coating with a level of P-C12-50 that combines high antimicrobial effectiveness and low toxicity to human cells.
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Affiliation(s)
- Chenyu Wang
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Olga Zolotarskaya
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Kayesh M Ashraf
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Xuejun Wen
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
- Institute for Engineering and Medicine, Department of Chemical and Life Science Engineering , Virginia Commonwealth University , 601 West Main Street, Room # 403 , Richmond , Virginia 23284-3028 , United States
| | - Dennis E Ohman
- Department of Microbiology and Immunology , VCU School of Medicine , 1101 East Marshall Street , Richmond , Virginia 23298 , United States
- McGuire Veterans Affairs Medical Center , Richmond , Virginia 23249 , United States
| | - Kenneth J Wynne
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
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14
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Ashraf KM, Wang C, Nair SS, Wynne KJ. "Big Dipper" Dynamic Contact Angle Curves for Pt-Cured Poly(dimethylsiloxane) on a Thermal Gradient: Inter-relationships of Hydrosilylation, Si-H Autoxidation, and Si-OH Condensation to a Secondary Network. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2747-2759. [PMID: 30681864 DOI: 10.1021/acs.langmuir.8b04126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Platinum cure for poly(dimethylsiloxane) (PDMS) coatings on a thermal gradient (45-140 °C) was carried out to study the effect of temperature on surface chemistry and wetting behavior. The motivation is the interest in surfaces with continuous gradients in wettability for applications such as protein adsorption, controlling bacterial adhesion, directional movement of cells, and biosensors. The Wilhelmy plate method and the advancing/receding drop method were employed for determining the positional dependence of θA and θR. A strong dependence of receding contact angles (θR) on cure temperature was found for Sylgard 184 (S-PDMS) and a Pt-cured laboratory-prepared analogue (Pt-PDMS) of known composition. Cure on the thermal gradient gave rise to striking "Big Dipper" Wilhelmy plate dynamic contact angle curves. High contact angle hysteresis (60-80°) was found for 45 °C cure (CAH = θΔ = θA - θR) but low CAH for 140 °C cure (10-20°). Drop addition/withdrawal using goniometry identified a similar trend. Attenuated total reflectance infrared spectroscopy showed absorptions for Si-OH (3500 cm-1) and Si-H (1250 cm-1) that were correlated with wetting behavior and near-surface chemistry. These studies revealed a complex relationship among hydrosilylation, Si-H autoxidation, and condensation of Si-OH. A model for advancing from a single network due to hydrosilylation to a double network for hydrosilylation plus Si-O-Si from condensation of Si-OH best explains evidence from spectroscopic and contact angle studies. These results are relevant to interactions of Pt-cured silicones at bio-interfaces, as receding contact angles determine work of adhesion, as well as applications that benefit from maximum hydrophobicity and minimizing water roll-off angles.
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Affiliation(s)
- Kayesh M Ashraf
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Room 422, Biotech 8, 737 N 5th Street , Richmond , Virginia 23219 , United States
| | - Chenyu Wang
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Room 422, Biotech 8, 737 N 5th Street , Richmond , Virginia 23219 , United States
| | - Sithara S Nair
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Room 422, Biotech 8, 737 N 5th Street , Richmond , Virginia 23219 , United States
| | - Kenneth J Wynne
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Room 422, Biotech 8, 737 N 5th Street , Richmond , Virginia 23219 , United States
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15
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Liu C, Sun J, Zhuang Y, Wei J, Li J, Dong L, Yan D, Hu A, Zhou X, Wang Z. Self-propelled droplet-based electricity generation. NANOSCALE 2018; 10:23164-23169. [PMID: 30515499 DOI: 10.1039/c8nr08772e] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Droplets are ubiquitous in nature and the preferential control of droplet transport offers limitless potential for efficient mass and momentum transfer as well as energy conversion. In this work, we show that even without the need for any external energy input, the self-propelled motion of droplets driven by a surface wetting gradient can lead to reliable electricity generation. Simple analytical analysis demonstrates that the output voltage results from the modulation of the surface charge distribution on the dynamically changing solid/liquid interfaces, which can be programmed by tailoring the wetting gradient and the size of the droplet. We demonstrate that a self-propelled 25 μL droplet can generate a peak current of 93.5 nA and a maximum output power of 2.4 nW. This work provides a new angle for optimizing energy harvesting devices based on liquid-solid interfaces.
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Affiliation(s)
- Chaoran Liu
- College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China and Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Jing Sun
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Yu Zhuang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Jie Wei
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Jing Li
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Linxi Dong
- College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Dongfang Yan
- College of Computer Science and Engineering, Chongqing Three Gorges University, 780 Shalong Road, Chongqing 404100, China
| | - Alice Hu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
| | - Xiaofeng Zhou
- Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Zuankai Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.
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17
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Si Y, Wang T, Li C, Yu C, Li N, Gao C, Dong Z, Jiang L. Liquids Unidirectional Transport on Dual-Scale Arrays. ACS NANO 2018; 12:9214-9222. [PMID: 29963851 DOI: 10.1021/acsnano.8b03924] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Liquids unidirectional transport has cutting-edge applications ranging from fog collection, oil-water separation, to microfluidic devices. Despite extensive progresses, existing man-made surfaces with asymmetric wettability or micro/nanoscales structures are still limited by complex fabrication techniques or obscure essential transport mechanisms to achieve unidirectional transport with both high speeds and large volumes. Here, we demonstrate the three-dimensional printed micro/macro dual-scale arrays for rapid, spontaneous, and continuous unidirectional transport. We reveal the essential directional transport mechanism via a Laplace pressure driven theory. The relationship between liquid unidirectional transport and surface morphology parameter is systematically explored. Threshold values to achieve unidirectional transport are determined. Significantly, dual-scale arrays even facilitate liquid's uphill running, microfluidics patterning, and liquid shunting in target directions without external energy input. Free combination of dual-scale island arrays modules, just like LEGO bricks, achieves fast liquid transport on demand. This dual-scale island array can be used to build smart laboratory-on-a-chip devices, printable microfluidic integration systems, and advanced biochemistry microreactors.
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Affiliation(s)
- Yifan Si
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry , Beihang University , Beijing 100191 , China
| | - Ting Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Chuxin Li
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Cunlong Yu
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry , Beihang University , Beijing 100191 , China
| | - Ning Li
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry , Beihang University , Beijing 100191 , China
| | - Can Gao
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry , Beihang University , Beijing 100191 , China
| | - Zhichao Dong
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Lei Jiang
- Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Chemistry , Beihang University , Beijing 100191 , China
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
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Parihar V, Bandyopadhyay S, Das S, Mukherjee R, Chakraborty S, Dasgupta S. Tailored topography: a novel fabrication technique using an elasticity gradient. SOFT MATTER 2018; 14:7034-7044. [PMID: 30109884 DOI: 10.1039/c8sm01054d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A facile methodology to create a wrinkled surface with a tailored topography is presented herein. The dependency of the elasticity of poly(dimethyl)siloxane (PDMS) on the curing temperature has been exploited to obtain a substrate with an elasticity gradient. The temperature gradient across the length of PDMS is created by a novel set-up consisting of a metal and insulator connected to a heater and the highest usable (no degradation of PDMS) temperature gradient is used. The time-dependent temperature distributions along the substrate are measured and the underlying physics of the dependence of the PDMS elasticity on the curing temperature is addressed. The PDMS substrate with the elasticity gradient is first stretched and subsequently oxidized by oxygen plasma. Upon relaxation, an ordered wrinkled surface with continuously varying wavelength and amplitude along the length of PDMS is obtained. The extent of hydrophobicity recovery of this plasma oxidized PDMS with varying elasticity has been studied. The change in the wavelength and amplitude of the regular patterns on the substrate can be controlled by varying operational parameters like applied pre-strain, plasma power and the heater temperature. It has been found that the spatial distributions of the topography and the hydrophobicity collectively decide the resultant wettability of the substrate. Such surfaces with gradients in the substructure dimensions demonstrate different wetting characteristics that may lead to a wide gamut of applications including droplet movement, cell adhesion and proliferation, diffraction grating etc.
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Affiliation(s)
- Vartika Parihar
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.
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19
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He W, Liu P, Zhang J, Yao X. Emerging Applications of Bioinspired Slippery Surfaces in Biomedical Fields. Chemistry 2018; 24:14864-14877. [DOI: 10.1002/chem.201801368] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 04/24/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Wenqing He
- Department of Biomedical Sciences; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong P.R. China
| | - Peng Liu
- Department of Biomedical Sciences; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong P.R. China
| | - Jianqiang Zhang
- Department of Biomedical Sciences; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong P.R. China
| | - Xi Yao
- Department of Biomedical Sciences; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong P.R. China
- City University of Hong Kong Shenzhen Research Institute; Shenzhen 518075 P.R. China
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20
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Wang C, Gupta MC, Yeong YH, Wynne KJ. Factors affecting the adhesion of ice to polymer substrates. J Appl Polym Sci 2017. [DOI: 10.1002/app.45734] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Chenyu Wang
- Department of Chemical and Life Science EngineeringVirginia Commonwealth University, 601 W. Main StreetRichmond Virginia23284
| | - Mool C. Gupta
- Charles. L. Brown Department of Electrical and Computer EngineeringUniversity of VirginiaCharlottesville Virginia22904
| | - Yong Han Yeong
- Charles. L. Brown Department of Electrical and Computer EngineeringUniversity of VirginiaCharlottesville Virginia22904
| | - Kenneth J. Wynne
- Department of Chemical and Life Science EngineeringVirginia Commonwealth University, 601 W. Main StreetRichmond Virginia23284
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21
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Liu C, Sun J, Li J, Xiang C, Che L, Wang Z, Zhou X. Long-range spontaneous droplet self-propulsion on wettability gradient surfaces. Sci Rep 2017; 7:7552. [PMID: 28790426 PMCID: PMC5548791 DOI: 10.1038/s41598-017-07867-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 07/04/2017] [Indexed: 11/09/2022] Open
Abstract
The directional and long-range droplet transportation is of great importance in microfluidic systems. However, it usually requires external energy input. Here we designed a wettability gradient surface that can drive droplet motion by structural topography. The surface has a wettability gradient range of over 150° from superhydrophobic to hydrophilic, which was achieved by etching silicon nanopillars and adjusting the area of hydrophilic silicon dioxide plane. We conducted force analysis to further reveal the mechanism for droplet self-propulsion, and found that the nanostructures are critical to providing a large driving force and small resistance force. Theoretical calculation has been used to analyze the maximal self-propulsion displacement on different gradient surfaces with different volumes of droplets. On this basis, we designed several surfaces with arbitrary paths, which achieved directional and long-range transportation of droplet. These results clarify a driving mechanism for droplet self-propulsion on wettability gradient surfaces, and open up new opportunities for long-range and directional droplet transportation in microfluidic system.
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Affiliation(s)
- Chaoran Liu
- Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.,School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Sun
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Jing Li
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Chenghao Xiang
- Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.,School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lufeng Che
- Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China. .,College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310027, China.
| | - Zuankai Wang
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China.
| | - Xiaofeng Zhou
- Science and Technology on Microsystem Laboratory, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.
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22
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Wang D, Klein J, Mejía E. Catalytic Systems for the Cross-Linking of Organosilicon Polymers. Chem Asian J 2017; 12:1180-1197. [PMID: 28394453 DOI: 10.1002/asia.201700304] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/05/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Dengxu Wang
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Germany
- National Engineering Technology Research Center for Colloidal Materials & Key Laboratory of Special Functional Aggregated Materials; Shandong University; 27 Shanda Nanlu 250100 Jinan P. R. China
| | - Johann Klein
- Adhesive Technologies, AR Reactive Systems; Henkel AG & Co KGaA; Henkelstraße 67 40589 Düsseldorf Germany
| | - Esteban Mejía
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; Albert-Einstein-Strasse 29a 18059 Rostock Germany
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23
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Ashraf KM, Wang C, Nair SS, Wynne KJ, Higgins DA, Collinson MM. Base Layer Influence on Protonated Aminosilane Gradient Wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4207-4215. [PMID: 28421767 DOI: 10.1021/acs.langmuir.7b00614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Protonated amine gradients have been prepared on silicon wafers via programmed controlled rate infusion (CRI) with varying degrees of hydrophobicity and characterized by X-ray photoelectron spectroscopy (XPS) and static and Wilhelmy plate dynamic contact angle measurements. Initially, base layers were spin coated from sols containing tetramethoxysilane (TMOS) and either phenyltrimethoxysilane (PTMOS), dimethyldimethoxysilane (DMDMOS), or octyltrimethoxysilane (OTMOS, C8). Amine gradients were then prepared from 3-aminopropyltriethoxysilane (APTEOS) via CRI. Gradients were exposed to concentrated HCl vapor for amine protonation. XPS showed that NH2 functional groups were distributed in a gradient fashion as a result of CRI controlling the time of exposure to APTEOS. Interestingly, the overall extent of N modification depended on the type of base layer used for gradient formation. The C8-derived base layer had about half the amount of nitrogen on the surface as compared to those prepared from TMOS, which was attributed to a reduction in the number and accessibility of surface silanol groups. The wettability and contact angle (CA) hysteresis were also dependent on the base layer and varied along the length of the gradient. The greatest CA change across the length of the gradient was observed on the gradient formed on the C8-derived base layer. Likewise, the CA hysteresis was approximately 2 times larger on the C8-modified surfaces, indicative of greater chemical inhomogeneity. In contrast to uniformly modified substrates, Wilhelmy plate CA analysis that involves the immersion of samples gave a unique S-shaped CA distance curve for the gradients. The three curve segments correspond to hydrophilic, hydrophobic, and a middle connecting region. Importantly, these curves give precise CAs along the gradient that reflect the surface chemistry and coverage defined by programmed CRI processing.
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Affiliation(s)
| | | | | | | | - Daniel A Higgins
- Department of Chemistry, Kansas State University , Manhattan, Kansas 66506-0401, United States
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Wang C, Nair S, Wynne KJ. Wilhelmy balance characterization beyond contact angles: Differentiating leaching from nanosurface reorganization and optimizing surface modification. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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