1
|
K NA, Kumar S. Ion Selectivity in Multilayered Stacked Nanoporous Graphene. ACS APPLIED MATERIALS & INTERFACES 2024; 16:5294-5301. [PMID: 38236663 DOI: 10.1021/acsami.3c15044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Nanoporous graphene is an ideal candidate for molecular filtration as it can potentially combine high permeability with high selectivity at molecular levels. To make use of graphene in filtration setups, the defects formed during its growth and during the transfer of graphene to the carrier support pose a challenge. These uncontrolled pores can be avoided by stacking graphene layers, and then, controlled pores can be initiated with oxygen plasma. Here, we show that two-layer stacks provide the best balance of defect coverage and high selectivity compared with other stacks. Using the electrical characterization of ionic solutions in the standard diffusion cell, we compare the ionic transport and ionic selectivity of up to three-layered stacks of graphene that have been plasma-treated. We find that there is a decrease in the ionic selectivity of a two-layered stack as one more layer of graphene is added. We provide a model for this occurrence. Our results will be helpful for making practical and high-performance filtration systems from two-dimensional materials.
Collapse
Affiliation(s)
- Niketa A K
- Department of Electrical Engineering, Indian Institute of Technology Hyderabad, Hyderabad 502284, Telangana, India
| | - Shishir Kumar
- Department of Electrical Engineering, Indian Institute of Technology Hyderabad, Hyderabad 502284, Telangana, India
| |
Collapse
|
2
|
Si L, Wu Y, Xiao H, Xing W, Song R, Li Y, Wang S, Liang X, Yu W, Song J, Shen S. A superstable, flexible, and scalable nanofluidic ion regulation composite membrane. Sci Bull (Beijing) 2023; 68:2344-2353. [PMID: 37684133 DOI: 10.1016/j.scib.2023.08.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 05/25/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023]
Abstract
Two-dimensional layered membranes with high and stable ion transport properties have various applications in nanofluidic devices; however, their construction remains a considerable challenge. Herein, we develop a superstable aramid nanofiber/graphite composite membrane with numerous one-dimensional and two-dimensional nano-confined interspaces for ultrafast ion transport. The fabricated flexible and scalable membrane exhibits high tensile strength (∼115.3 MPa) even after immersion in water for 90 days. Further, the aramid nanofiber/graphite conductor features the surface-charge-governed ion transport behavior. The ionic conductivity of the membrane at a low potassium chloride concentration of 10-4 mol/L can be enhanced by 16 times that of the bulk counterpart. More importantly, its structure and ionic conductivity remain unchanged even after immersion in different harsh solutions (e.g., acid, base, and ethanol) for over 30 days. Molecular dynamics simulations reveal that the superstability of the membrane is attributable to the robust interchain interactions within the aramid nanofibers and the strong interfacial interactions between the aramid nanofibers and graphite nanosheets. This study highlights the superior structural stability of the proposed flexible and scalable aramid nanofiber/graphite composite membrane, which could be employed in advanced nanofluidic devices for application under extreme working environments.
Collapse
Affiliation(s)
- Lianmeng Si
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yihan Wu
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hong Xiao
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Wensi Xing
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Rui Song
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yiju Li
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Sha Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
| | - Xu Liang
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Wenshan Yu
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Jianwei Song
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Shengping Shen
- State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| |
Collapse
|
3
|
Ko SH, Park PJ, Han J. Continuous-flow macromolecular sieving in slanted nanofilter array: stochastic model and coupling effect of electrostatic and steric hindrance. LAB ON A CHIP 2023; 23:4422-4433. [PMID: 37655439 DOI: 10.1039/d3lc00405h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Microfabricated slanted nanofilter arrays are a promising technology for integrated biomolecule analysis systems such as online monitoring and point-of-care quality validation, due to their continuous-flow and one-step operation capability. However, an incomplete understanding of the system limits the performance and wider applications of slanted nanofilter arrays. In this paper, we present rigorous theoretical and experimental studies on macromolecule sieving in a slanted nanofilter array. From both stochastic and kinetic models, an explicit theoretical solution describing size-dependent molecule sieving was derived, which was validated using experimental sieving results obtained for various sieving conditions. Our results not only detail the relationship between sieving conditions and sieving efficiency but also demonstrate that sieving is affected by multiple hindrance effects (electrostatic hindrance), not steric hindrance alone. There is an optimal sieving condition for achieving the greatest separation efficiency for DNAs of a certain size range. Small DNA has great size selectivity in small nanofilters and in weak electric fields, whereas large DNA is present in large nanofilters and in strong electric fields. This study provides insights into designing a slanted nanofilter array for particular target applications and understanding the sieving principles in the nanofilter array.
Collapse
Affiliation(s)
- Sung Hee Ko
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, 20892, USA.
| | - Pyeong Jun Park
- School of Liberal Arts and Sciences, Korea National University of Transportation, Chungju, Chungcheongbuk-do, 27469, Republic of Korea.
| | - Jongyoon Han
- Department of Electrical Engineering and Computer Science, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02142, USA
- BioSystsinems and Micromechanics (BioSyM), Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore, 138602, Singapore
| |
Collapse
|
4
|
Rohskopf Z, Kwon T, Ko SH, Bozinovski D, Jeon H, Mohan N, Springs SL, Han J. Continuous Online Titer Monitoring in CHO Cell Culture Supernatant Using a Herringbone Nanofluidic Filter Array. Anal Chem 2023; 95:14608-14615. [PMID: 37733929 DOI: 10.1021/acs.analchem.3c02104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Online monitoring of monoclonal antibody product titers throughout biologics process development and production enables rapid bioprocess decision-making and process optimization. Conventional analytical methods, including high-performance liquid chromatography and turbidimetry, typically require interfacing with an automated sampling system capable of online sampling and fractionation, which suffers from increased cost, a higher risk of failure, and a higher mechanical complexity of the system. In this study, a novel nanofluidic system for continuous direct (no sample preparation) IgG titer measurements was investigated. Tumor necrosis factor α (TNF-α), conjugated with fluorophores, was utilized as a selective binder for adalimumab in the unprocessed cell culture supernatant. The nanofluidic device can separate the bound complex from unbound TNF-α and selectively concentrate the bound complex for high-sensitivity detection. Based on the fluorescence intensity from the concentrated bound complex, a fluorescence intensity versus titer curve can be generated, which was used to determine the titer of samples from filtered, unpurified Chinese hamster ovary cell cultures continuously. The system performed direct monitoring of IgG titers with nanomolar resolution and showed a good correlation with the biolayer interferometry assays. Furthermore, by variation of the concentration of the indicator (TNF-α), the dynamic range of the system can be tuned and further expanded.
Collapse
Affiliation(s)
- Zhumei Rohskopf
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Taehong Kwon
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139, United States
| | - Sung Hee Ko
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139, United States
| | - Dragana Bozinovski
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hyungkook Jeon
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Naresh Mohan
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stacy L Springs
- Center for Biomedical Innovation, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Critical Analytics for Manufacturing Personalized-Medicine (CAMP) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore117583,Singapore
| | - Jongyoon Han
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge,Massachusetts 02139, United States
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Critical Analytics for Manufacturing Personalized-Medicine (CAMP) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore117583,Singapore
| |
Collapse
|
5
|
Ersoz TT, Ersoz M. Nanostructured Material and its Application in Membrane Separation
Technology. MICRO AND NANOSYSTEMS 2023; 15:16-27. [DOI: 10.2174/1876402914666220318121343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/08/2021] [Accepted: 01/24/2022] [Indexed: 09/01/2023]
Abstract
Abstract:
Nanomaterials are classified with their at least one dimension in the range of 1-100 nm, which offers new innovative solutions for membrane development. These are included as nanosized adsorbents, nanomembranes, nanocomposites, photocatalysts, nanotubes, nanoclays, etc. Nanomaterials are promising, exceptional properties for one of the opportunity is to prevent the global water crisis with their extraordinary performance as their usage for membrane development, particularly for water treatment process. Nanomaterial based membranes that include nanoparticles, nanofibers, 2D layered materials, and their nanostructured composites which provide superior permeation characteristics besides their antifouling, antibacterial and photodegradation properties. They are enable for providing the extraordinary properties to be used as ultrafast and ultimately selective membranes for water purification. In this review, recently developed nanomaterial based membranes and their applications for water treatment process were summarized. The main attention is given to the nanomaterial based membrane structure design. The variety in terms of constituent structure and alterations provide nanomaterial based membranes which will be expected to be a perfect separation membrane in the future.
Collapse
Affiliation(s)
- Tugrul Talha Ersoz
- Nanotechnology and Advanced Materials, Institute of Sciences, Selcuk University, Kampus, 42130 Konya, Turkey
| | - Mustafa Ersoz
- Department of Chemistry, Faculty of Science, Selcuk University, Kampus, 42130 Konya, Turkey
| |
Collapse
|
6
|
Walczak M, Brady RA, Leathers A, Kotar J, Di Michele L. Influence of hydrophobic moieties on the crystallization of amphiphilic DNA nanostructures. J Chem Phys 2023; 158:084501. [PMID: 36859089 DOI: 10.1063/5.0132484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Three-dimensional crystalline frameworks with nanoscale periodicity are valuable for many emerging technologies, from nanophotonics to nanomedicine. DNA nanotechnology has emerged as a prime route for constructing these materials, with most approaches taking advantage of the structural rigidity and bond directionality programmable for DNA building blocks. Recently, we have introduced an alternative strategy reliant on flexible, amphiphilic DNA junctions dubbed C-stars, whose ability to crystallize is modulated by design parameters, such as nanostructure topology, conformation, rigidity, and size. While C-stars have been shown to form ordered phases with controllable lattice parameter, response to stimuli, and embedded functionalities, much of their vast design space remains unexplored. Here, we investigate the effect of changing the chemical nature of the hydrophobic modifications and the structure of the DNA motifs in the vicinity of these moieties. While similar design variations should strongly alter key properties of the hydrophobic interactions between C-stars, such as strength and valency, only limited differences in self-assembly behavior are observed. This finding suggests that long-range order in C-star crystals is likely imposed by structural features of the building block itself rather than the specific characteristics of the hydrophobic tags. Nonetheless, we find that altering the hydrophobic regions influences the ability of C-star crystals to uptake hydrophobic molecular cargoes, which we exemplify by studying the encapsulation of antibiotic penicillin V. Besides advancing our understanding of the principles governing the self-assembly of amphiphilic DNA building blocks, our observations thus open up new routes to chemically program the materials without affecting their structure.
Collapse
Affiliation(s)
- Michal Walczak
- Department of Physics-Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Ryan A Brady
- Department of Chemistry, King's College London, London SE1 1DB, United Kingdom
| | - Adrian Leathers
- Department of Physics-Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Jurij Kotar
- Department of Physics-Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Lorenzo Di Michele
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
| |
Collapse
|
7
|
Han Y, Chatterjee P, Alam SB, Prozorov T, Slowing II, Evans JW. Interlayer spacing in pillared and grafted MCM-22 type silicas: density functional theory analysis versus experiment. Phys Chem Chem Phys 2023; 25:4680-4689. [PMID: 36285555 DOI: 10.1039/d2cp03391g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Pillaring of synthetic layered crystalline silicates and aluminosilicates provides a strategy to enhance their adsorption and separation performance, and can facilitate the understanding of such behavior in more complex natural clays. We perform the first-principles density functional theory calculations for the pillaring of the pure silica polymorph of an MCM-22 type molecular sieve. Starting with a precursor material MCM-22P with fully hydroxylated layers, a pillaring agent, (EtO)3SiR, can react with hydroxyl groups (-OH) on adjacent internal surfaces, 2(-OH) + (EtO)3SiR + H2O → (-O)2SiOHR + 3EtOH, to form a pillar bridging these surfaces, or with a single hydroxyl, -OH + (EtO)3SiR + 2H2O → (-O)Si(OH)2R + 3EtOH, grafting to one surface. For computational efficiency, we replace the experimental organic ligand, R, by a methyl group. We find that the interlayer spacing in MCM-22 is reduced by 2.66 Å relative to weakly bound layers in the precursor MCM-22P. Including (-O)2SiR bridges for 50% (100%) of the hydroxyl sites in MCM-22P increases the interlayer spacing relative to MCM-22 by 2.52 Å (2.46 Å). For comparison, we also analyze the system where all -OH groups in MCM-22P are replaced by non-bridging grafted (-O)Si(OH)2R which results in a smaller interlayer spacing expansion of 2.17 Å relative to MCM-22. Our results for the interlayer spacing in the pillared materials are compatible with experimental observations for a similar MCM-22 type material with low Al content (Si : Al = 51 : 1) of an expansion relative to MCM-22 of roughly 2.8 Å and 2.5 Å from our x-ray diffraction and scanning transmission electron microscopy analyses, respectively. The latter analysis reveals significant variation in individual layer spacings.
Collapse
Affiliation(s)
- Yong Han
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - Puranjan Chatterjee
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - Sardar B Alam
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA.
| | - Tanya Prozorov
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA.
| | - Igor I Slowing
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
| | - James W Evans
- Division of Chemical and Biological Sciences, Ames National Laboratory, Ames, Iowa 50011, USA. .,Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| |
Collapse
|
8
|
Lyu S, Zhang Y, Du G, Di C, Yao H, Fan Y, Duan J, Lei D. Double-sided plasmonic metasurface for simultaneous biomolecular separation and SERS detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121801. [PMID: 36122462 DOI: 10.1016/j.saa.2022.121801] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
Porous membrane-based nanofiltration separation of small biomolecules is a widely used biotechnology for which size-based selectivity is a critical parameter of technological relevance. Efficient determination of size selectivity calls for an advanced detection method capable of performing sensitive, rapid, and on-membrane examination. Surface-enhanced Raman spectroscopy (SERS) is such a detection method that has been widely recognized as an ultrasensitive technique for trace-level detection with sensitivity down to the single-molecule level. In this work, we for the first time develop a double-sided hierarchical porous membrane-like plasmonic metasurface to realize high-selectivity bimolecular separation and simultaneous ultrasensitive SERS detection. This highly flexible device, consisting of subwavelength nanocone pairs surrounded by randomly orientated sub-5 nm nanogrooves, was prepared by combining customized "top-down" fabrication of conical nanopores in an ion-track registered polycarbonate membrane and self-assembly of nanogrooves on the membrane surface through physical vapor deposition. The unique tip-to-tip oriented conical nanopores in the device enables excellent size-based molecular selectivity; the hierarchical groove-pore structure supports a peculiar cascaded electromagnetic near-field enhancement mechanism, endowing the device with SERS-based molecular detection of ultrahigh sensitivity, uniformity, repeatability, and polarization independence. With such dual structural merits and performance enhancement, we demonstrate effective nanofiltration separation of small-sized adenine from big-sized ss-DNA and synergistic SERS determination of their species. We experimentally demonstrate an ultrasensitive detection of 4-mercaptopyridine down to 10 pM. Together with its unparalleled mechanical flexibility, this double-side-responsive plasmonic metasurface membrane can find great potential in real-world molecular filtration and detection under extremely complex working conditions.
Collapse
Affiliation(s)
- Shuangbao Lyu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongliang Zhang
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Guanghua Du
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Cuixia Di
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huijun Yao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516000, China
| | - Yulong Fan
- Department of Materials Science and Engineering, City University of Hong Kong, 83, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Jinglai Duan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516000, China.
| | - Dangyuan Lei
- Department of Materials Science and Engineering, City University of Hong Kong, 83, Tat Chee Avenue, Kowloon, Hong Kong, China.
| |
Collapse
|
9
|
Rahman M, Islam KR, Islam MR, Islam MJ, Kaysir MR, Akter M, Rahman MA, Alam SMM. A Critical Review on the Sensing, Control, and Manipulation of Single Molecules on Optofluidic Devices. MICROMACHINES 2022; 13:968. [PMID: 35744582 PMCID: PMC9229244 DOI: 10.3390/mi13060968] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 02/06/2023]
Abstract
Single-molecule techniques have shifted the paradigm of biological measurements from ensemble measurements to probing individual molecules and propelled a rapid revolution in related fields. Compared to ensemble measurements of biomolecules, single-molecule techniques provide a breadth of information with a high spatial and temporal resolution at the molecular level. Usually, optical and electrical methods are two commonly employed methods for probing single molecules, and some platforms even offer the integration of these two methods such as optofluidics. The recent spark in technological advancement and the tremendous leap in fabrication techniques, microfluidics, and integrated optofluidics are paving the way toward low cost, chip-scale, portable, and point-of-care diagnostic and single-molecule analysis tools. This review provides the fundamentals and overview of commonly employed single-molecule methods including optical methods, electrical methods, force-based methods, combinatorial integrated methods, etc. In most single-molecule experiments, the ability to manipulate and exercise precise control over individual molecules plays a vital role, which sometimes defines the capabilities and limits of the operation. This review discusses different manipulation techniques including sorting and trapping individual particles. An insight into the control of single molecules is provided that mainly discusses the recent development of electrical control over single molecules. Overall, this review is designed to provide the fundamentals and recent advancements in different single-molecule techniques and their applications, with a special focus on the detection, manipulation, and control of single molecules on chip-scale devices.
Collapse
Affiliation(s)
- Mahmudur Rahman
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| | - Kazi Rafiqul Islam
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| | - Md. Rashedul Islam
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| | - Md. Jahirul Islam
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh;
| | - Md. Rejvi Kaysir
- Department of Electrical and Computer Engineering, University of Waterloo, 200 University Ave. W, Waterloo, ON N2L 3G1, Canada;
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave. W, Waterloo, ON N2L 3G1, Canada
| | - Masuma Akter
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| | - Md. Arifur Rahman
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| | - S. M. Mahfuz Alam
- Department of Electrical and Electronic Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh; (M.R.); (K.R.I.); (M.R.I.); (M.A.); (M.A.R.)
| |
Collapse
|
10
|
Khan JU, Ruland A, Sayyar S, Paull B, Chen J, Innis PC. Wireless bipolar electrode-based textile electrofluidics: towards novel micro-total-analysis systems. LAB ON A CHIP 2021; 21:3979-3990. [PMID: 34636814 DOI: 10.1039/d1lc00538c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Point of care testing using micro-total-analysis systems (μTAS) is critical to emergent healthcare devices with rapid and robust responses. However, two major barriers to the success of this approach are the prohibitive cost of microchip fabrication and poor sensitivity due to small sample volumes in a microfluidic format. Here, we aimed to replace the complex microchip format with a low-cost textile substrate with inherently built microchannels using the fibers' spaces. Secondly, by integrating this textile-based microfluidics with electrophoresis and wireless bipolar electrochemistry, we can significantly improve solute detection by focusing and concentrating the analytes of interest. Herein, we demonstrated that an in situ metal electrode simply inserted inside the textile-based electrophoretic system can act as a wireless bipolar electrode (BPE) that generates localized electric field and pH gradients adjacent to the BPE and extended along the length of the textile construct. As a result, charged analytes were not only separated electrophoretically but also focused where their electrophoretic migration and counter flow (EOF) balances due to redox reactions proceeding at the BPE edges. The developed wireless redox focusing technique on textile constructs was shown to achieve a 242-fold enrichment of anionically charged solute over an extended time of 3000 s. These findings suggest a simple route that achieves separation and analyte focusing on low-cost surface-accessible inverted substrates, which is far simpler than the more complex ITP on conventional closed and inaccessible capillary channels.
Collapse
Affiliation(s)
- Jawairia Umar Khan
- ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, University of Wollongong, Innovation Campus, New South Wales 2500, Australia.
- Department of Fibre and Textile Technology, University of Agriculture, Faisalabad 38000, Pakistan
| | - Andres Ruland
- ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, University of Wollongong, Innovation Campus, New South Wales 2500, Australia.
| | - Sepidar Sayyar
- ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, University of Wollongong, Innovation Campus, New South Wales 2500, Australia.
- Australian National Fabrication Facility - Materials Node, University of Wollongong, Innovation Campus, New South Wales 2500, Australia
| | - Brett Paull
- Australian Centre for Research on Separation Science (ACROSS) and, ARC Centre of Excellence for Electromaterials Science (ACES), School of Natural Sciences, University of Tasmania, Hobart, Tasmania 7005, Australia
| | - Jun Chen
- ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, University of Wollongong, Innovation Campus, New South Wales 2500, Australia.
| | - Peter C Innis
- ARC Centre of Excellence for Electromaterials Science (ACES), AIIM Facility, University of Wollongong, Innovation Campus, New South Wales 2500, Australia.
- Australian National Fabrication Facility - Materials Node, University of Wollongong, Innovation Campus, New South Wales 2500, Australia
| |
Collapse
|
11
|
Kong W, Chen C, Chen G, Wang C, Liu D, Das S, Chen G, Li T, Li J, Liu Y, Li Z, Clifford BC, Hu L. Wood Ionic Cable. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2008200. [PMID: 34496143 DOI: 10.1002/smll.202008200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 07/07/2021] [Indexed: 06/13/2023]
Abstract
The combination of good stability, biocompatibility, and high mechanical strength is attractive for bio-related material applications, but it remains challenging to simultaneously achieve these properties in a single, ionically conductive material. Here a "wood" ionic cable, made of aligned wood nanofibrils, demonstrating a combination of biocompatibility, high mechanical strength, high ionic conductivity, and excellent stability is reported. The wood ionic cable possesses excellent flexibility and exhibits high tensile strength up to 260 MPa (in the dry state) and ≈80 MPa (in the wet state). The nanochannels within the highly aligned cellulose nanofibrils and the presence of negative charges on the surfaces of these nanochannels, originating from the cellulose hydroxyl groups, provide new opportunities for ion regulation at low salt concentrations. Ion regulation in turn enables the wood ionic cable to have unique nanofluidic ionic behaviors. The Na+ ion conductivity of the wood ionic cable can reach up to ≈1.5 × 10-4 S cm-1 at low Na+ ion concentration (1.0 × 10-5 mol L-1 ), which is an order of magnitude higher than that of bulk NaCl solution at the same concentration. The scalable, biocompatible wood ionic cable enables novel ionic device designs for potential ion-regulation applications.
Collapse
Affiliation(s)
- Weiqing Kong
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Chaoji Chen
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Gegu Chen
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Chengwei Wang
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Dapeng Liu
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Guang Chen
- Department of Mechanical Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Tian Li
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Jianguo Li
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Yang Liu
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Zhihan Li
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Bryson Callie Clifford
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland College Park, College Park, MD, 20742, USA
| |
Collapse
|
12
|
Artificial sodium-selective ionic device based on crown-ether crystals with subnanometer pores. Nat Commun 2021; 12:5231. [PMID: 34471132 PMCID: PMC8410819 DOI: 10.1038/s41467-021-25597-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 08/18/2021] [Indexed: 02/07/2023] Open
Abstract
Biological sodium channels ferry sodium ions across the lipid membrane while rejecting potassium ions and other metal ions. Realizing such ion selectivity in an artificial solid-state ionic device will enable new separation technologies but remains highly challenging. In this work, we report an artificial sodium-selective ionic device, built on synthesized porous crown-ether crystals which consist of densely packed 0.26-nm-wide pores. The Na+ selectivity of the artificial sodium-selective ionic device reached 15 against K + , which is comparable to the biological counterpart, 523 against Ca2 + , which is nearly two orders of magnitude higher than the biological one, and 1128 against Mg2 + . The selectivity may arise from the size effect and molecular recognition effect. This work may contribute to the understanding of the structure-performance relationship of ion selective nanopores.
Collapse
|
13
|
Zeng Z, Song R, Zhang S, Han X, Zhu Z, Chen X, Wang L. Biomimetic N-Doped Graphene Membrane for Proton Exchange Membranes. NANO LETTERS 2021; 21:4314-4319. [PMID: 33848172 DOI: 10.1021/acs.nanolett.1c00813] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Proton exchange membranes (PEMs) with both high selectivity and high permeance are of great demand in hydrogen-based applications, especially in fuel cells. Although graphene membranes have shown high selectivity of protons over other ions and molecules, the relatively low permeance of protons through perfect pristine graphene restricts its practical applications. Inspired by the nitrogen-assisted proton transport in biological systems, we introduced N-doping to increase the proton permeance and proposed a type of N-doped graphene membranes (NGMs) for proton exchange, which have both high proton permeance and high selectivity. Compared to the state-of-the-art commercial PEMs, the NGMs show significant increases in both areal proton conductivity (2-3 orders of magnitude) and selectivity of proton to methanol (1-2 orders of magnitude). The work realized the controllable tuning of proton permeance of the graphene membrane with N-doping and developed a new type of graphene-based PEMs with high performance for practical applications.
Collapse
Affiliation(s)
- Zhiyang Zeng
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Ruiyang Song
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Shengping Zhang
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Xiao Han
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Zhen Zhu
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Xiaobo Chen
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
| | - Luda Wang
- Institute of Microelectronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| |
Collapse
|
14
|
Li S, Fan Z, Wu G, Shao Y, Xia Z, Wei C, Shen F, Tong X, Yu J, Chen K, Wang M, Zhao Y, Luo Z, Jian M, Sun J, Kaner RB, Shao Y. Assembly of Nanofluidic MXene Fibers with Enhanced Ionic Transport and Capacitive Charge Storage by Flake Orientation. ACS NANO 2021; 15:7821-7832. [PMID: 33834770 DOI: 10.1021/acsnano.1c02271] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
MXenes are an emerging class of highly conductive two-dimensional (2D) materials with electrochemical storage features. Oriented macroscopic Ti3C2Tx fibers can be fabricated from a colloidal 2D nematic phase dispersion. The layered conductive Ti3C2Tx fibers are ideal candidates for constructing high-speed ionic transport channels to enhance the electrochemical capacitive charge storage performance. In this work, we assemble Ti3C2Tx fibers with a high degree of flake orientation by a wet spinning process with controlled spinning speeds and morphology of the spinneret. In addition to the effects of cross-linking of magnesium ions between Ti3C2Tx flakes, the electronic conductivity and mechanical strength of the as-prepared fibers have been improved to 7200 S cm-1 and 118 MPa, respectively. The oriented Ti3C2Tx fibers present a volumetric capacitive charge storage capability of up to 1360 F cm-3 even in a Mg-ion based neutral electrolyte, with contributions from both nanofluidic ion transport and Mg-ion intercalation pseudocapacitance. The oriented 2D Ti3C2Tx driven nanofluidic channels with great electronic conductivity and mechanical strength endows the MXene fibers with attributes for serving as conductive ionic cables and active materials for fiber-type capacitive electrochemical energy storage, biosensors, and potentially biocompatible fibrillar tissues.
Collapse
Affiliation(s)
- Shuo Li
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Zhaodi Fan
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Guiqing Wu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University, Shanghai 201620, P.R. China
| | - Yanyan Shao
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Zhou Xia
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Chaohui Wei
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Fei Shen
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Xiaoling Tong
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Jinchao Yu
- College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, P.R. China
| | - Kang Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering, Donghua University, Shanghai 201620, P.R. China
| | - Menglei Wang
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Yu Zhao
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
| | - Zhipu Luo
- Institute of Molecular Enzymology, School of Biology & Basic Medical Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Muqiang Jian
- Beijing Graphene Institute (BGI), Beijing, 100095, P. R. China
| | - Jingyu Sun
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
- Beijing Graphene Institute (BGI), Beijing, 100095, P. R. China
| | - Richard B Kaner
- Department of Chemistry, Department of Materials Science and Engineering, and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
| | - Yuanlong Shao
- College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou 215006, P.R. China
- Beijing Graphene Institute (BGI), Beijing, 100095, P. R. China
| |
Collapse
|
15
|
Fang YL, Wang CH, Chen YS, Chien CC, Kuo FC, You HL, Lee MS, Lee GB. An integrated microfluidic system for early detection of sepsis-inducing bacteria. LAB ON A CHIP 2021; 21:113-121. [PMID: 33232424 DOI: 10.1039/d0lc00966k] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Since early diagnosis of sepsis may assist clinicians in initiating timely, effective, and prognosis-improving antibiotic therapy, we developed an integrated microfluidic chip (IMC) for rapid isolation of both Gram-positive and Gram-negative bacteria from blood. The device comprised a membrane-based filtration module (90 min operating time), a bacteria-capturing module using a micro-mixer containing magnetic beads coated with "flexible neck" regions of mannose-binding lectin proteins for bacteria capture (20 min), and a miniature polymerase chain reaction (PCR) module for bacteria identification (90 min via TaqMan® probe technology). The filter separated all white blood cells and 99.5% of red blood cells from bacteria, which were captured at rates approaching 85%. The PCR assay's limit of detection was 5 colony-forming units (CFU) per reaction, and the entire process was completed in only 4 h. Since this is far less than that for culture-based approaches, this IMC may serve as a promising device for detection of sepsis.
Collapse
Affiliation(s)
- Yen-Ling Fang
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Samarasinghe TN, Zeng Y, Johnson CK. Comparison of separation modes for microchip electrophoresis of proteins. J Sep Sci 2020; 44:744-751. [PMID: 33226183 DOI: 10.1002/jssc.202000883] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 12/12/2022]
Abstract
Separation of a set of model proteins was tested on a microchip electrophoresis analytical platform capable of sample injection by two different electrokinetic mechanisms. A range of separation modes-microchip capillary zone electrophoresis, microchip micellar electrokinetic chromatography, and nanoparticle-based sieving-was tested on glass and polydimethylsiloxane/glass microchips and with silica-nanoparticle colloidal arrays. The model proteins calmodulin (18 kiloDalton), bovine serum albumin (66 kDa), and concanavalin (106 kDa) were labeled with Alexa Fluor 647 for laser-induced fluorescence detection. The best separation and resolution were obtained in a silica-nanoparticle colloidal array chip.
Collapse
Affiliation(s)
| | - Yong Zeng
- Department of Chemistry, University of Kansas, Lawrence, Kansas, USA
| | - Carey K Johnson
- Department of Chemistry, University of Kansas, Lawrence, Kansas, USA
| |
Collapse
|
17
|
Zhang L, Wu K, Chen Z, Li J, Yu X, Yang S, Hui G, Yang M. Quasi-Continuum Water Flow under Nanoconfined Conditions: Coupling the Effective Viscosity and the Slip Length. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Linyang Zhang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Keliu Wu
- State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
| | - Zhangxin Chen
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
- Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum (Beijing), Beijing 102249, China
| | - Jing Li
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
- Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum (Beijing), Beijing 102249, China
| | - Xinran Yu
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Sheng Yang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Gang Hui
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Min Yang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| |
Collapse
|
18
|
Seo M, Park S, Lee D, Lee H, Kim SJ. Continuous and spontaneous nanoparticle separation by diffusiophoresis. LAB ON A CHIP 2020; 20:4118-4127. [PMID: 32909576 DOI: 10.1039/d0lc00593b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The separation of nanoparticles has drawn critical attention in various microfluidic applications including chemical analysis, diagnostics and environmental monitoring. Thus, a number of nanoparticle separation methods have been extensively proposed. However, most of the conventional methods require complicated structured devices, expensive manufacturing processes, and external power sources. While a spontaneous diffusiophoretic separation device based on an ion exchange mechanism could overcome such drawbacks, the recovery of separated particles and the inevitable development of an acidic environment due to the release of H+ from the cation exchange membrane limit its practical applicability. Therefore, in this work, we present a simple but robust nanoparticle separation method based on spontaneously induced diffusiophoresis, which is operated in a continuous manner to overcome the limitations of conventional methods. First, we confirmed that the particle exclusion distance followed the previously developed scaling law of diffusiophoresis. Consequently, we demonstrated the separation of nanoparticles of 40 nm, 200 nm and 2 μm diameter by utilizing the fact that the exclusion distances of various particles were proportional to their diffusiophoretic mobility. Furthermore, the use of Tris buffer increased the diffusiophoretic migration of nanoparticles due to the enhanced concentration gradient, and enabled the produced solution to be compatible with pH-sensitive bio-samples. Therefore, we expect this continuous and spontaneous diffusiophoretic separation platform to be useful in practical applications for analyzing various nano-meter scale bio-particles.
Collapse
Affiliation(s)
- Myungjin Seo
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Sungmin Park
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Dokeun Lee
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea.
| | - Hyomin Lee
- Department of Chemical and Biological Engineering, Jeju National University, Jeju 63243, Republic of Korea.
| | - Sung Jae Kim
- Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of Korea. and Nano Systems Institute, Seoul National University, Seoul 08826, Republic of Korea and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| |
Collapse
|
19
|
Abd-Razak NH, Zairossani MN, Chew YMJ, Bird MR. Fouling Analysis and the Recovery of Phytosterols from Orange Juice Using Regenerated Cellulose Ultrafiltration Membranes. FOOD BIOPROCESS TECH 2020. [DOI: 10.1007/s11947-020-02541-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
AbstractThis study describes the use of regenerated cellulose (RCA) membranes with molecular weight cut-off (MWCO) values of 10, 30, and 100 kDa, respectively, to separate phytosterols from orange juice for possible nutraceutical production. A desirable membrane separation rejects protein whilst transmitting phytosterols and other low molecular mass compounds such as sugars. The ultrafiltration was performed in a cross-flow membrane system with a total filtration area of 336 cm2. Total phytosterol analysis was carried out by using a Liebermann-Buchard-based method. Protein concentration was quantified by the Bradford method. The effects of three different membranes upon the rejection of total phytosterol content, proteins, sugar, and antioxidant activity were studied. Of the membranes tested, the 10-kDa membrane displayed the highest concentration of phytosterols in the permeate. The 30-kDa and 100-kDa membranes gave comparatively higher phytosterol rejection. The membrane surface roughness and corresponding pure water flux values varied as a function of MWCO such that RCA30 > RCA100 > RCA10. Membranes with rougher surfaces displayed higher fouling than those with smoother surfaces. Hydrophobicity and surface roughness both influenced filtration performance, by controlling the development of the protein-based foulant which modified membrane selectivity.
Collapse
|
20
|
Xia L, Deb R, Dutta D. Electrokinetic stacking of particle zones in confined channels enabling their UV absorbance detection on microchips. Anal Chim Acta 2020; 1135:83-90. [PMID: 33070862 DOI: 10.1016/j.aca.2020.08.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 08/06/2020] [Accepted: 08/10/2020] [Indexed: 11/24/2022]
Abstract
In this article, we report a simple approach to stacking micro- and nanoparticle zones by electrokinetically migrating them through moderately confined channels of uniform cross-section. Experiments show the reported pre-concentration process to initiate at the tail end of the zone following its electrokinetic injection, with the stacked region migrating faster than the rest of the sample band. This effect causes the particles traveling in front to merge into the stacked region making it grow both in size and concentration. Because the stacked zone also gradually loses particles from its trailing edge, it eventually disintegrates upon running out of particles at its front end. Nevertheless, enhancements in peak height by over 100-fold were recorded using the reported approach for polystyrene beads with diameters comparable to the channel depth. This enhancement however, exhibited a temporal variation as the particle band migrated through the analysis column reaching a maximum value that depended on the particle diameter, particle concentration, channel depth, electric field strength, electroosmotic mobility, etc. Interestingly, the peak area recorded by the detector remained relatively constant during this particle migration period allowing reliable sample quantitation. Moreover, upon incubating antibody-coated particles against an antigen sample, the peak area for the particle zone was seen to scale linearly with the antigen concentration establishing the utility of the reported focusing phenomenon for chemical/biochemical analysis. The noted stacking technique was further applied to enabling UV absorbance detection of particle zones on microchips which then allowed us to determine the colloidal content in actual natural water samples. .
Collapse
Affiliation(s)
- Ling Xia
- Department of Chemistry, University of Wyoming, Laramie, WY, 82071, USA
| | - Rajesh Deb
- Department of Chemistry, University of Wyoming, Laramie, WY, 82071, USA
| | - Debashis Dutta
- Department of Chemistry, University of Wyoming, Laramie, WY, 82071, USA.
| |
Collapse
|
21
|
Choi J, Baek S, Kim HC, Chae JH, Koh Y, Seo SW, Lee H, Kim SJ. Nanoelectrokinetic Selective Preconcentration Based on Ion Concentration Polarization. BIOCHIP JOURNAL 2020. [DOI: 10.1007/s13206-020-4109-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
22
|
Di Trani N, Pimpinelli A, Grattoni A. Finite-Size Charged Species Diffusion and pH Change in Nanochannels. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12246-12255. [PMID: 32068385 DOI: 10.1021/acsami.9b19182] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Molecular transport through nanofluidic structures exhibits properties that are unique at the nanoscale. The high surface-to-volume ratio of nanometer-sized confined spaces renders particle interactions with the surface of central importance. The electrical double layer (EDL) at the solid-liquid interface of charged surfaces generates an enrichment of counterions and the exclusion of co-ions that lead to a change in their diffusivity. In addition, the diffusive transport is altered by steric and hydrodynamic interactions between fluid molecules and the boundaries. An extensive body of literature investigates molecular transport at the nanoscale. However, most studies account for ionic species as point charges, severely limiting the applicability of the results to "large" nanofluidic systems. Moreover, and even more importantly, the change of pH in the nanoconfined region inside nanochannels has been completely overlooked. Corroborated by experimental data, here we present an all-encompassing analysis of molecular diffusion from the micro- to the ultra-nanoscale. While accounting for finite-size ions, we compute self-consistently the pH inside the channels. Surprisingly, we found that the concentration of ions H+ can change by more than 2 orders of magnitude compared to the bulk, hugely affecting molecular transport. Further, we found that counterions exhibit both enrichment and exclusion, depending on the size of nanochannels. Achieving a greater understanding of the effective transport properties of fluids at the nanoscale will fill the gap in knowledge that still limits development of innovative systems for medicine and industrial applications alike.
Collapse
Affiliation(s)
- Nicola Di Trani
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
- University of Chinese Academy of Science (UCAS), 19 Yuquan Road, Beijing 100049, Shijingshan, China
| | - Alberto Pimpinelli
- Smalley-Curl Institute and MSNE Department, Rice University, Houston, Texas 77005, United States
| | - Alessandro Grattoni
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
- Department of Surgery, Houston Methodist Hospital, Houston, Texas 77030, United States
- Department of Radiation Oncology, Houston Methodist Hospital, Houston, Texas 77030, United States
| |
Collapse
|
23
|
Lee K, Kang JH, Kim HM, Ahn J, Lim H, Lee J, Jeon WJ, Lee JH, Kim KB. Direct electrophoretic microRNA preparation from clinical samples using nanofilter membrane. NANO CONVERGENCE 2020; 7:1. [PMID: 31930443 PMCID: PMC6955385 DOI: 10.1186/s40580-019-0212-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 11/08/2019] [Indexed: 05/17/2023]
Abstract
A method to directly collect negatively charged nucleic acids, such as DNA and RNA, in the biosamples simply by applying an electric field in between the sample and collection buffer separated by the nanofilter membrane is proposed. The nanofilter membrane was made of low-stress silicon nitride with a thickness of 100 nm, and multiple pores were perforated in a highly arranged pattern using nanoimprint technology with a pore size of 200 nm and a pore density of 7.22 × 108/cm2. The electrophoretic transport of hsa-mir-93-5p across the membrane was confirmed in pure microRNA (miRNA) mimic solution using quantitative reverse transcription-polymerase chain reactions (qRT-PCR). Consistency of the collected miRNA quantity, stability of the system during the experiment, and yield and purity of the prepared sample were discussed in detail to validate the effectiveness of the electrical protocol. Finally, in order to check the applicability of this method to clinical samples, liquid biopsy process was demonstrated by evaluating the miRNA levels in sera of hepatocellular carcinoma patients and healthy controls. This efficient system proposed a simple, physical idea in preparation of nucleic acid from biosamples, and demonstrated its compatibility to biological downstream applications such as qRT-PCR as the conventional nucleic acid extraction protocols.
Collapse
Affiliation(s)
- Kidan Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jae-Hyun Kang
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyun-Mi Kim
- Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Junhyoung Ahn
- Department of Nano Manufacturing Technology, Nano Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), Daejeon, 34103, Republic of Korea
| | - Hyungjun Lim
- Department of Nano Manufacturing Technology, Nano Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), Daejeon, 34103, Republic of Korea
- Department of Nanomechatronics, University of Science & Technology, Daejeon, 34113, Republic of Korea
| | - JaeJong Lee
- Department of Nano Manufacturing Technology, Nano Convergence Mechanical Systems Research Division, Korea Institute of Machinery & Materials (KIMM), Daejeon, 34103, Republic of Korea
- Department of Nanomechatronics, University of Science & Technology, Daejeon, 34113, Republic of Korea
| | - Wan-Jin Jeon
- Heimbiotek Inc., Seongnam, Gyeonggi-do, 13486, Republic of Korea
| | - Jae-Hoon Lee
- Heimbiotek Inc., Seongnam, Gyeonggi-do, 13486, Republic of Korea
| | - Ki-Bum Kim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea.
- Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea.
| |
Collapse
|
24
|
Slot Self-Allocation Based MAC Protocol for Energy Harvesting Nano-Networks. SENSORS 2019; 19:s19214646. [PMID: 31731541 PMCID: PMC6864841 DOI: 10.3390/s19214646] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/23/2019] [Accepted: 10/23/2019] [Indexed: 11/17/2022]
Abstract
Nano-networks are composed of interconnected nano-nodes and can enable unprecedented applications in various fields. Due to the peculiarities of nano-networks, such as high density, extremely limited energy and computational resources, traditional carrier-sensing based Media Access Control (MAC) protocols are not suitable for nano-networks. In this paper, a Slot Self-Allocation based MAC protocol (SSA-MAC) is proposed for energy harvesting nano-networks. Two transmission schemes for centralized and distributed nano-networks are designed, respectively. In centralized nano-networks, nano-nodes can only send packets to the nano-controller in their Self-Allocation Slots (SASs), while, in distributed nano-networks, nano-nodes can only receive packets from surrounding nano-nodes in their SASs. Extensive simulations were conducted to compare the proposed SSA-MAC with PHysical LAyer aware MAC (PHLAME), Receiver-Initiated Harvesting-aware MAC (RIH-MAC) and Energy Efficient Wireless NanoSensor Network MAC (EEWNSN). From the results, it can be concluded that the proposed SSA-MAC achieves better performance and can reduce the collision probability, while improving the energy efficiency of nano-networks.
Collapse
|
25
|
Borberg E, Zverzhinetsky M, Krivitsky A, Kosloff A, Heifler O, Degabli G, Soroka HP, Fainaro RS, Burstein L, Reuveni S, Diamant H, Krivitsky V, Patolsky F. Light-Controlled Selective Collection-and-Release of Biomolecules by an On-Chip Nanostructured Device. NANO LETTERS 2019; 19:5868-5878. [PMID: 31381354 DOI: 10.1021/acs.nanolett.9b01323] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The analysis of biosamples, e.g., blood, is a ubiquitous task of proteomics, genomics, and biosensing fields; yet, it still faces multiple challenges, one of the greatest being the selective separation and detection of target proteins from these complex biosamples. Here, we demonstrate the development of an on-chip light-triggered reusable nanostructured selective and quantitative protein separation and preconcentration platform for the direct analysis of complex biosamples. The on-chip selective separation of required protein analytes from raw biosamples is performed using antibody-photoacid-modified Si nanopillars vertical arrays (SiNPs) of ultralarge binding surface area and enormously high binding affinity, followed by the light-controlled rapid release of the tightly bound target proteins in a controlled liquid media. Two important experimental observations are presented: (1) the first demonstration on the control of biological reaction binding affinity by the nanostructuring of the capturing surface, leading to highly efficient protein collection capabilities, and (2) the light-triggered switching of the highly sticky binding surfaces into highly reflective nonbinding surfaces, leading to the rapid and quantitative release of the originally tightly bound protein species. Both of these two novel behaviors were theoretically and experimentally investigated. Importantly, this is the first demonstration of a three-dimensional (3D) SiNPs on-chip filter with ultralarge binding surface area and reversible light-controlled quantitative release of adsorbed biomolecules for direct purification of blood samples, able to selectively collect and separate specific low abundant proteins, while easily removing unwanted blood components (proteins, cells) and achieving desalting results, without the requirement of time-consuming centrifugation steps, the use of desalting membranes, or affinity columns.
Collapse
Affiliation(s)
- Ella Borberg
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Marina Zverzhinetsky
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Adva Krivitsky
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv 69978 , Israel
| | - Alon Kosloff
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Omri Heifler
- Department of Materials Science and Engineering, The Iby and Aladar Fleischman Faculty of Engineering , Tel Aviv University , Tel Aviv 69978 , Israel
| | - Gal Degabli
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Hagit Peretz Soroka
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Ronit Satchi Fainaro
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv 69978 , Israel
| | - Larisa Burstein
- The Wolfson Applied Materials Research Centre , Tel-Aviv University , Tel-Aviv 69978 , Israel
| | - Shlomi Reuveni
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Haim Diamant
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Vadim Krivitsky
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
| | - Fernando Patolsky
- School of Chemistry, Faculty of Exact Sciences , Tel Aviv University , Tel Aviv , 69978 , Israel
- Department of Materials Science and Engineering, The Iby and Aladar Fleischman Faculty of Engineering , Tel Aviv University , Tel Aviv 69978 , Israel
| |
Collapse
|
26
|
Petersen CF, Franosch T. Anomalous transport in the soft-sphere Lorentz model. SOFT MATTER 2019; 15:3906-3913. [PMID: 30998231 DOI: 10.1039/c9sm00442d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The sensitivity of anomalous transport in crowded media to the form of the inter-particle interactions is investigated through computer simulations. We extend the highly simplified Lorentz model towards realistic natural systems by modeling the interactions between the tracer and the obstacles with a smooth potential. We find that the anomalous transport at the critical point happens to be governed by the same universal exponent as for hard exclusion interactions, although the mechanism of how narrow channels are probed is rather different. The scaling behavior of simulations close to the critical point confirm this exponent. Our result indicates that the simple Lorentz model may be applicable to describing the fundamental properties of long-range transport in real crowded environments.
Collapse
Affiliation(s)
- Charlotte F Petersen
- Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria.
| | | |
Collapse
|
27
|
Brady RA, Kaufhold WT, Brooks NJ, Foderà V, Di Michele L. Flexibility defines structure in crystals of amphiphilic DNA nanostars. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:074003. [PMID: 30523829 DOI: 10.1088/1361-648x/aaf4a1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
DNA nanostructures with programmable shape and interactions can be used as building blocks for the self-assembly of crystalline materials with prescribed nanoscale features, holding a vast technological potential. Structural rigidity and bond directionality have been recognised as key design features for DNA motifs to sustain long-range order in 3D, but the practical challenges associated with prescribing building-block geometry with sufficient accuracy have limited the variety of available designs. We have recently introduced a novel platform for the one-pot preparation of crystalline DNA frameworks supported by a combination of Watson-Crick base pairing and hydrophobic forces (Brady et al 2017 Nano Lett. 17 3276-81). Here we use small angle x-ray scattering and coarse-grained molecular simulations to demonstrate that, as opposed to available all-DNA approaches, amphiphilic motifs do not rely on structural rigidity to support long-range order. Instead, the flexibility of amphiphilic DNA building-blocks is a crucial feature for successful crystallisation.
Collapse
Affiliation(s)
- Ryan A Brady
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | | | | | | | | |
Collapse
|
28
|
Liu F, Wang M, Wang X, Wang P, Shen W, Ding S, Wang Y. Fabrication and application of nanoporous polymer ion-track membranes. NANOTECHNOLOGY 2019; 30:052001. [PMID: 30511655 DOI: 10.1088/1361-6528/aaed6d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
With the development of the nano-fabrication and nanofluidics, nanoporous membranes have shown great potential in applications such as molecular separation, energy conversion, and molecular sensing. However, their performance has often been limited by the trade-off between selectivity and permeability and the lack of scalability. The prospect of overcoming these problems with nanoporous polymer ion-track membranes is promising. Focusing on these membranes, this review provides a comprehensive overview of fabrication methods, including the traditional track-etching technique and the recently developed track-UV technique; characterization methods; transport mechanisms; and major properties and applications.
Collapse
Affiliation(s)
- Feng Liu
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China. Center for Quantitative Biology, Peking University, Beijing 100871, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
29
|
Brady RA, Brooks NJ, Foderà V, Cicuta P, Di Michele L. Amphiphilic-DNA Platform for the Design of Crystalline Frameworks with Programmable Structure and Functionality. J Am Chem Soc 2018; 140:15384-15392. [PMID: 30351920 DOI: 10.1021/jacs.8b09143] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The reliable preparation of functional, ordered, nanostructured frameworks would be a game changer for many emerging technologies, from energy storage to nanomedicine. Underpinned by the excellent molecular recognition of nucleic acids, along with their facile synthesis and breadth of available functionalizations, DNA nanotechnology is widely acknowledged as a prime route for the rational design of nanostructured materials. Yet, the preparation of crystalline DNA frameworks with programmable structure and functionality remains a challenge. Here we demonstrate the potential of simple amphiphilic DNA motifs, dubbed "C-stars", as a versatile platform for the design of programmable DNA crystals. In contrast to all-DNA materials, in which structure depends on the precise molecular details of individual building blocks, the self-assembly of C-stars is controlled uniquely by their topology and symmetry. Exploiting this robust self-assembly principle, we design a range of topologically identical, but structurally and chemically distinct C-stars that following a one-pot reaction self-assemble into highly porous, functional, crystalline frameworks. Simple design variations allow us to fine-tune the lattice parameter and thus control the partitioning of macromolecules within the frameworks, embed responsive motifs that can induce isothermal disassembly, and include chemical moieties to capture target proteins specifically and reversibly.
Collapse
Affiliation(s)
- Ryan A Brady
- Biological and Soft Systems, Cavendish Laboratory , University of Cambridge , Cambridge CB3 0HE , United Kingdom
| | - Nicholas J Brooks
- Department of Chemistry , Imperial College London , London SW7 2AZ , United Kingdom
| | - Vito Foderà
- Department of Pharmacy , University of Copenhagen , Universitetsparken 2 , 2100 Copenhagen , Denmark
| | - Pietro Cicuta
- Biological and Soft Systems, Cavendish Laboratory , University of Cambridge , Cambridge CB3 0HE , United Kingdom
| | - Lorenzo Di Michele
- Biological and Soft Systems, Cavendish Laboratory , University of Cambridge , Cambridge CB3 0HE , United Kingdom
| |
Collapse
|
30
|
Wu W, Yang Q, Su B. Centimeter-scale continuous silica isoporous membranes for molecular sieving. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.04.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
31
|
Approach to classify, separate, and enrich objects in groups using ensemble sorting. Proc Natl Acad Sci U S A 2018; 115:5681-5685. [PMID: 29760051 DOI: 10.1073/pnas.1721929115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The sorting of objects into groups is a fundamental operation, critical in the preparation and purification of populations of cells, crystals, beads, or droplets, necessary for research and applications in biology, chemistry, and materials science. Most of the efforts exploring such purification have focused on two areas: the degree of separation and the measurement precision required for effective separation. Conventionally, achieving good separation ultimately requires that the objects are considered one by one (which can be both slow and expensive), and the ability to measure the sorted objects by increasing sensitivity as well as reducing sorting errors. Here we present an approach to sorting that addresses both critical limitations with a scheme that allows us to approach the theoretical limit for the accuracy of sorting decisions. Rather than sorting individual objects, we sort the objects in ensembles, via a set of registers which are then in turn sorted themselves into a second symmetric set of registers in a lossless manner. By repeating this process, we can arrive at high sorting purity with a low set of constraints. We demonstrate both the theory behind this idea and identify the critical parameters (ensemble population and sorting time), and show the utility and robustness of our method with simulations and experimental systems spanning several orders of scale, sorting populations of macroscopic beads and microfluidic droplets. Our method is general in nature and simplifies the sorting process, and thus stands to enhance many different areas of science, such as purification, enrichment of rare objects, and separation of dynamic populations.
Collapse
|
32
|
Abstract
Long-read genomic applications, such as genome mapping in nanochannels, require long DNA that is free of small-DNA impurities. We have developed a chip-based system based on entropic trapping that can simultaneously concentrate and purify a long DNA sample under the alternating application of an applied pressure (for sample injection) and an electric field (for filtration and concentration). In contrast, short DNA tends to pass through the filter owing to its comparatively weak entropic penalty for entering the nanoslit. The single-stage prototype developed here, which operates in a continuous pulsatile manner, achieves selectivities of up to 3.5 for λ-phage DNA (48.5 kilobase pairs) compared to a 2 kilobase pair standard based on experimental data for the fraction filtered using pure samples of each species. The device is fabricated in fused silica using standard clean-room methods, making it compatible for integration with long-read genomics technologies.
Collapse
Affiliation(s)
- Pranav Agrawal
- Department of Chemical Engineering and Materials Science, University of Minnesota - Twin Cities, 421 Washington Ave. SE, Minneapolis, MN 55455, USA.
| | | | | |
Collapse
|
33
|
Angeli E, Buzio R, Firpo G, Magrassi R, Mussi V, Repetto L, Valbusa U. Nanotechnology Applications in Medicine. TUMORI JOURNAL 2018; 94:206-15. [DOI: 10.1177/030089160809400213] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In recent years there has been a rapid increase in nanotechnology applications to medicine in order to prevent and treat diseases in the human body. The established and future applications have the potential to dramatically change medical science. The present paper will give a few examples that could transform common medical procedures.
Collapse
Affiliation(s)
- Elena Angeli
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Renato Buzio
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Giuseppe Firpo
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Raffaella Magrassi
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Valentina Mussi
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Luca Repetto
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| | - Ugo Valbusa
- NanoMed Labs, Centro di Biotecnologie Avanzate CBA and Dipartimento di Fisica dell'Università di Genova, Genoa, Italy
| |
Collapse
|
34
|
Sun Y, Xu C, Li Y. Intrusion of polyethylene glycol into solid-state nanopores. RSC Adv 2018; 8:9070-9073. [PMID: 35541879 PMCID: PMC9078677 DOI: 10.1039/c8ra00329g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/23/2018] [Indexed: 11/21/2022] Open
Abstract
The mechanism of PEG molecule penetration into nanopores upon mechanical pressure is understood.
Collapse
Affiliation(s)
- Yueting Sun
- State Key Laboratory of Automotive Safety and Energy
- Tsinghua University
- Beijing
- P. R. China
| | - Chengliang Xu
- State Key Laboratory of Automotive Safety and Energy
- Tsinghua University
- Beijing
- P. R. China
| | - Yibing Li
- State Key Laboratory of Automotive Safety and Energy
- Tsinghua University
- Beijing
- P. R. China
| |
Collapse
|
35
|
Mireles M, Gaborski TR. Fabrication techniques enabling ultrathin nanostructured membranes for separations. Electrophoresis 2017; 38:2374-2388. [PMID: 28524241 PMCID: PMC5909070 DOI: 10.1002/elps.201700114] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/01/2017] [Accepted: 05/11/2017] [Indexed: 11/09/2022]
Abstract
The fabrication of nanostructured materials is an area of continuous improvement and innovative techniques that fulfill the demand of many fields of research and development. The continuously decreasing size of the smallest patternable feature has expanded the catalog of methods enabling the fabrication of nanostructured materials. Several of these nanofabrication techniques have sprouted from applications requiring nanoporous membranes such as molecular separations, cell culture, and plasmonics. This review summarizes methods that successfully produce through-pores in ultrathin films exhibiting an approximate pore size to thickness ratio of one, which has been shown to be beneficial due to high permeability and improved separation potential. The material reviewed includes large-area, parallel, and affordable approaches such as self-organizing polymers, nanosphere lithography, anodization, nanoimprint lithography as well as others such as solid phase crystallization and nanosphere lens lithography. The aim of this review is to provide a set of inexpensive fabrication techniques to produce nanostructured materials exhibiting pores ranging from 10 to 350 nm and a pore size to thickness ratio close to one. The fabrication methods described in this work have reported the successful manufacture of nanoporous membranes exhibiting the ideal characteristics to improve selectivity and permeability when applied as separation media in ultrafiltration.
Collapse
Affiliation(s)
- Marcela Mireles
- Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
| | - Thomas R Gaborski
- Biomedical Engineering Department, Rochester Institute of Technology, Rochester, NY, USA
| |
Collapse
|
36
|
Abstract
Transplantation is often the only choice many patients have when suffering from end-stage organ failure. Although the quality of life improves after transplantation, challenges, such as organ shortages, necessary immunosuppression with associated complications, and chronic graft rejection, limit its wide clinical application. Nanotechnology has emerged in the past 2 decades as a field with the potential to satisfy clinical needs in the area of targeted and sustained drug delivery, noninvasive imaging, and tissue engineering. In this article, we provide an overview of popular nanotechnologies and a summary of the current and potential uses of nanotechnology in cell and organ transplantation.
Collapse
|
37
|
Brady RA, Brooks NJ, Cicuta P, Di Michele L. Crystallization of Amphiphilic DNA C-Stars. NANO LETTERS 2017; 17:3276-3281. [PMID: 28417635 DOI: 10.1021/acs.nanolett.7b00980] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Many emerging technologies require materials with well-defined three-dimensional nanoscale architectures. Production of these structures is currently underpinned by self-assembling amphiphilic macromolecules or engineered all-DNA building blocks. Both of these approaches produce restricted ranges of crystal geometries due to synthetic amphiphiles' simple shape and limited specificity, or the technical difficulties in designing space-filling DNA motifs with targeted shapes. We have overcome these limitations with amphiphilic DNA nanostructures, or "C-Stars", that combine the design freedom and facile functionalization of DNA-based materials with robust hydrophobic interactions. C-Stars self-assemble into single crystals exceeding 40 μm in size with lattice parameters exceeding 20 nm.
Collapse
Affiliation(s)
- Ryan A Brady
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Nicholas J Brooks
- Department of Chemistry, Imperial College London , London SW7 2AZ, U.K
| | - Pietro Cicuta
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| | - Lorenzo Di Michele
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, U.K
| |
Collapse
|
38
|
Motevaselian MH, Aluru NR. An EQT-based cDFT approach for thermodynamic properties of confined fluid mixtures. J Chem Phys 2017; 146:154102. [DOI: 10.1063/1.4979896] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- M. H. Motevaselian
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - N. R. Aluru
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| |
Collapse
|
39
|
Mandal S, Franosch T. Diverging Time Scale in the Dimensional Crossover for Liquids in Strong Confinement. PHYSICAL REVIEW LETTERS 2017; 118:065901. [PMID: 28234501 DOI: 10.1103/physrevlett.118.065901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Indexed: 06/06/2023]
Abstract
We study a strongly interacting dense hard-sphere system confined between two parallel plates by event-driven molecular dynamics simulations to address the fundamental question of the nature of the 3D to 2D crossover. As the fluid becomes more and more confined the dynamics of the transverse and lateral degrees of freedom decouple, which is accompanied by a diverging time scale separating 2D from 3D behavior. Relying on the time-correlation function of the transversal kinetic energy, the scaling behavior and its density dependence is explored. Surprisingly, our simulations reveal that its time dependence becomes purely exponential such that memory effects can be ignored. We rationalize our findings quantitatively in terms of an analytic theory which becomes exact in the limit of strong confinement.
Collapse
Affiliation(s)
- Suvendu Mandal
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| | - Thomas Franosch
- Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| |
Collapse
|
40
|
Gao J, Feng Y, Guo W, Jiang L. Nanofluidics in two-dimensional layered materials: inspirations from nature. Chem Soc Rev 2017; 46:5400-5424. [DOI: 10.1039/c7cs00369b] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review highlights the recent progress, current challenges, and future perspectives in the design and application of 2D layered materials for nanofluidic research, with emphasis on the thought of bio-inspiration.
Collapse
Affiliation(s)
- Jun Gao
- Physics of Complex Fluids
- University of Twente
- Enschede 7500
- The Netherlands
| | - Yaping Feng
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Wei Guo
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Lei Jiang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| |
Collapse
|
41
|
Bassu M, Holik P, Schmitz S, Steltenkamp S, Burg TP. Continuous high throughput nanofluidic separation through tangential-flow vertical nanoslit arrays. LAB ON A CHIP 2016; 16:4546-4553. [PMID: 27766330 DOI: 10.1039/c6lc01089j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanofluidic devices exhibit unique, tunable transport properties that may lead to breakthroughs in molecular separations and sensing. However, the throughput of these devices is orders of magnitude too small for the processing of macroscopic samples. Here we overcome this problem by combining two technological innovations. First, nanofluidic channels are made as vertical slits connecting the two sides of a silicon nitride membrane. Arbitrary arrays of such nanoslits down to 15 nm wide with <6 Å uniformity were made by merging the idea of templating with chemical mechanical polishing to create a scalable, nanolithography-free wafer level process. Second, we provide for efficient solute transport to and from the openings of the nanoslits by incorporating the nanofluidic membrane into a microfluidic tangential-flow system, which is also fabricated at wafer level. As an exemplary application, we demonstrate charge-based continuous flow separation of small molecules with a selectivity of 100 and constant flux over more than 100 hours of operation. This proves the exciting possibility of exploiting transport phenomena governed by precision-engineered nanofluidic devices at a macroscopic scale.
Collapse
Affiliation(s)
- Margherita Bassu
- Biological Micro- and Nanotechnology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
| | - Peter Holik
- Micro System Technology (MST), Centre of Advanced European Studies and Research (caesar), 53175 Bonn, Germany
| | - Sam Schmitz
- Micro System Technology (MST), Centre of Advanced European Studies and Research (caesar), 53175 Bonn, Germany
| | - Siegfried Steltenkamp
- Micro System Technology (MST), Centre of Advanced European Studies and Research (caesar), 53175 Bonn, Germany
| | - Thomas P Burg
- Biological Micro- and Nanotechnology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.
| |
Collapse
|
42
|
Shaabani N, Jemere AB, Harrison DJ. Size-based proteins separation using polymer-entrapped colloidal self-assembled nanoparticles on-chip. Electrophoresis 2016; 37:2602-2609. [DOI: 10.1002/elps.201600224] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/23/2016] [Accepted: 07/12/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Narges Shaabani
- Department of Chemistry; University of Alberta; Edmonton AB Canada
| | - Abebaw B. Jemere
- National Institute for Nanotechnology; National Research Council Canada; Edmonton AB Canada
| | - D. Jed Harrison
- Department of Chemistry; University of Alberta; Edmonton AB Canada
- National Institute for Nanotechnology; National Research Council Canada; Edmonton AB Canada
| |
Collapse
|
43
|
Attanasio C, Latancia MT, Otterbein LE, Netti PA. Update on Renal Replacement Therapy: Implantable Artificial Devices and Bioengineered Organs. TISSUE ENGINEERING PART B-REVIEWS 2016; 22:330-40. [PMID: 26905099 DOI: 10.1089/ten.teb.2015.0467] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Recent advances in the fields of artificial organs and regenerative medicine are now joining forces in the areas of organ transplantation and bioengineering to solve continued challenges for patients with end-stage renal disease. The waiting lists for those needing a transplant continue to exceed demand. Dialysis, while effective, brings different challenges, including quality of life and susceptibility to infection. Unfortunately, the majority of research outputs are far from delivering satisfactory solutions. Current efforts are focused on providing a self-standing device able to recapitulate kidney function. In this review, we focus on two remarkable innovations that may offer significant clinical impact in the field of renal replacement therapy: the implantable artificial renal assist device (RAD) and the transplantable bioengineered kidney. The artificial RAD strategy utilizes micromachining techniques to fabricate a biohybrid system able to mimic renal morphology and function. The current trend in kidney bioengineering exploits the structure of the native organ to produce a kidney that is ready to be transplanted. Although these two systems stem from different technological approaches, they are both designed to be implantable, long lasting, and free standing to allow patients with kidney failure to be autonomous. However, for both of them, there are relevant issues that must be addressed before translation into clinical use and these are discussed in this review.
Collapse
Affiliation(s)
- Chiara Attanasio
- 1 Center for Advanced Biomaterials for Health Care, IIT@CRIB, Istituto Italiano di Tecnologia , Napoli, Italy
| | - Marcela T Latancia
- 2 Department of Surgery, Transplant Institute , Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Leo E Otterbein
- 2 Department of Surgery, Transplant Institute , Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Paolo A Netti
- 1 Center for Advanced Biomaterials for Health Care, IIT@CRIB, Istituto Italiano di Tecnologia , Napoli, Italy
| |
Collapse
|
44
|
Bhadra P, Sengupta S, Ratchagar NP, Achar B, Chadha A, Bhattacharya E. Selective transportation of charged ZnO nanoparticles and microorganism dialysis through silicon nanoporous membranes. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.12.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
45
|
Alishahi M, Kamali R, Abouali O. Numerical investigation of molecular nano-array in potential-energy profile for a single dsDNA. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2016; 39:50. [PMID: 27125679 DOI: 10.1140/epje/i2016-16050-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/20/2016] [Accepted: 04/05/2016] [Indexed: 06/05/2023]
Abstract
A Rigorous numerical investigation on dsDNA translocation in quasi-2-dimensional nano-array filter is performed using Molecular Dynamics (MD) method. Various dsDNA molecules with different sizes are chosen in order to model Ogston sieving in a nano-array filter. The radius of gyration of dsDNA molecule is less than the characteristic length of the shallow region in nano-array. The dsDNA molecule is assumed to be in the 0.05M NaCl electrolyte. MD shows acceptable results for potential-energy profile for nano-array filter. According to the MD outcomes, the dsDNA electrophoretic mobility decreases almost linearly with dsDNA size and show the same trend as Ogston sieving for gel electrophoresis. In addition, different shapes for nano-array filter are studied for a unique dsDNA molecule. It is concluded that steeping the nano-array wall can cause the retardation of dsDNA translocation and decreases dsDNA electrophoretic mobility.
Collapse
Affiliation(s)
- Marzieh Alishahi
- School of Mechanical Engineering, Shiraz University, Shiraz, Iran
| | - Reza Kamali
- School of Mechanical Engineering, Shiraz University, Shiraz, Iran.
| | - Omid Abouali
- School of Mechanical Engineering, Shiraz University, Shiraz, Iran
| |
Collapse
|
46
|
Spanner M, Höfling F, Kapfer SC, Mecke KR, Schröder-Turk GE, Franosch T. Splitting of the Universality Class of Anomalous Transport in Crowded Media. PHYSICAL REVIEW LETTERS 2016; 116:060601. [PMID: 26918973 DOI: 10.1103/physrevlett.116.060601] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Indexed: 06/05/2023]
Abstract
We investigate the emergence of subdiffusive transport by obstruction in continuum models for molecular crowding. While the underlying percolation transition for the accessible space displays universal behavior, the dynamic properties depend in a subtle nonuniversal way on the transport through narrow channels. At the same time, the different universality classes are robust with respect to introducing correlations in the obstacle matrix as we demonstrate for quenched hard-sphere liquids as underlying structures. Our results confirm that the microscopic dynamics can dominate the relaxational behavior even at long times, in striking contrast to glassy dynamics.
Collapse
Affiliation(s)
- Markus Spanner
- Institut für Theoretische Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
| | - Felix Höfling
- Fachbereich Mathematik und Informatik, Freie Universität Berlin, Arnimallee 6, 14195 Berlin, Germany
- Max-Planck-Institut für Intelligente Systeme, Heisenbergstraße 3, 70569 Stuttgart, Germany, and IV. Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
| | - Sebastian C Kapfer
- Institut für Theoretische Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
| | - Klaus R Mecke
- Institut für Theoretische Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
| | - Gerd E Schröder-Turk
- Murdoch University, School of Engineering and IT, Mathematics and Statistics, Murdoch, Western Australia 6150, Australia
| | - Thomas Franosch
- Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck, Technikerstraße 21A, A-6020 Innsbruck, Austria
| |
Collapse
|
47
|
Kulkarni M, Mukherjee A. Ionic liquid prolongs DNA translocation through graphene nanopores. RSC Adv 2016. [DOI: 10.1039/c6ra07017e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ionic liquid molecules interact strongly with DNA and effectively reduce its translocation speed via graphene nanopore.
Collapse
Affiliation(s)
- Mandar Kulkarni
- Department of Chemistry
- Indian Institute of Science Education and Research
- Pune-411008
- India
| | - Arnab Mukherjee
- Department of Chemistry
- Indian Institute of Science Education and Research
- Pune-411008
- India
| |
Collapse
|
48
|
Cheng L, Zhu LP, Zhang PB, Sun J, Zhu BK, Xu YY. Molecular separation by poly (N-vinyl imidazole) gel-filled membranes. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2015.09.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
49
|
Colosqui CE, Teng T, Rahmani AM. Wetting Driven by Thermal Fluctuations on Terraced Nanostructures. PHYSICAL REVIEW LETTERS 2015; 115:154504. [PMID: 26550728 DOI: 10.1103/physrevlett.115.154504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Indexed: 06/05/2023]
Abstract
Theoretical analysis and fully atomistic molecular dynamics simulations reveal a Brownian ratchet mechanism by which thermal fluctuations drive the net displacement of immiscible liquids confined in channels or pores with micro- or nanoscale dimensions. The thermally driven displacement is induced by surface nanostructures with directional asymmetry and can occur against the direction of action of wetting or capillary forces. Mean displacement rates in molecular dynamics simulations are predicted via analytical solution of a Smoluchowski diffusion equation for the position probability density. The proposed physical mechanisms and derived analytical expressions can be applied to engineer surface nanostructures for controlling the dynamics of diverse wetting processes such as capillary filling, wicking, and imbibition in micro- or nanoscale systems.
Collapse
Affiliation(s)
- Carlos E Colosqui
- Department of Mechanical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Teng Teng
- Department of Mechanical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Amir M Rahmani
- Department of Mechanical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| |
Collapse
|
50
|
Mashayak SY, Motevaselian MH, Aluru NR. An EQT-cDFT approach to determine thermodynamic properties of confined fluids. J Chem Phys 2015; 142:244116. [DOI: 10.1063/1.4922956] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- S. Y. Mashayak
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - M. H. Motevaselian
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - N. R. Aluru
- Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| |
Collapse
|