1
|
Song X, Smith JW, Kim J, Zaluzec NJ, Chen W, An H, Dennison JM, Cahill DG, Kulzick MA, Chen Q. Unraveling the Morphology-Function Relationships of Polyamide Membranes Using Quantitative Electron Tomography. ACS Appl Mater Interfaces 2019; 11:8517-8526. [PMID: 30676014 DOI: 10.1021/acsami.8b20826] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
An understanding of how complex nanoscale morphologies emerge from synthesis would offer powerful strategies to construct soft materials with designed structures and functions. However, these kinds of morphologies have proven difficult to characterize, and therefore manipulate, because they are three-dimensional (3D), nanoscopic, and often highly irregular. Here, we studied polyamide (PA) membranes used in wastewater reclamation as a prime example of this challenge. Using electron tomography and quantitative morphometry, we reconstructed the nanoscale morphology of 3D crumples and voids in PA membranes for the first time. Various parameters governing film transport properties, such as surface-to-volume ratio and mass-per-area, were measured directly from the reconstructed membrane structure. In addition, we extracted information inaccessible by other means. For example, 3D reconstruction shows that membrane nanostructures are formed from PA layers 15-20 nm thick folding into 3D crumples which envelope up to 30% void by volume. Mapping local curvature and thickness in 3D quantitatively groups these crumples into three classes, "domes", "dimples", and "clusters", each being a distinct type of microenvironment. Elemental mapping of metal ion adsorption across the film demonstrates that these previously missed parameters are relevant to membrane performance. This imaging-morphometry platform can be applicable to other nanoscale soft materials and potentially suggests engineering strategies based directly on synthesis-morphology-function relationships.
Collapse
Affiliation(s)
| | | | | | - Nestor J Zaluzec
- Photon Sciences Division , Argonne National Laboratory , Argonne , Illinois 60439 , United States
| | | | | | | | | | - Matthew A Kulzick
- BP Corporate Research Center , Naperville , Illinois 60563 , United States
| | | |
Collapse
|
2
|
Xie X, Dennison JM, Shin J, Diao Z, Cahill DG. Measurement of water vapor diffusion in nanoscale polymer films by frequency-domain probe beam deflection. Rev Sci Instrum 2018; 89:104904. [PMID: 30399957 DOI: 10.1063/1.5039731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/17/2018] [Indexed: 06/08/2023]
Abstract
We developed an optical pump-probe technique, frequency-domain probe beam deflection (FD-PBD) to measure the diffusion of water vapor in nanoscale polymer films with microsecond temporal resolution and micrometer spatial resolution. We describe the quantitative model of beam deflection for multilayer structures, the experimental approach, and the application of FD-PBD to measure the diffusivity (D m) of saturated water vapor in various glassy polymer films including polyimide (PI, D m = 7.0 × 10-13 m2 s-1), poly(methyl methacrylate) (PMMA, D m = 1.2 × 10-12 m2 s-1), poly-(vinylpyrrolidone) (PVP, D m = 1.7 × 10-12 m2 s-1), and cellulose acetate (CA, D m = 2.6 × 10-11 m2 s-1), and the piperazine/trimesoyl chloride (PIP/TMC, D m = 9 × 10-11 m2 s-1) nanofiltration membrane synthesized by interfacial polymerization. The uncertainty of the measurements is typically ≈8%.
Collapse
Affiliation(s)
- Xu Xie
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Jordan M Dennison
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Jungwoo Shin
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Zhu Diao
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - David G Cahill
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| |
Collapse
|
3
|
Dennison JM, Zupancic JM, Lin W, Dwyer JH, Murphy CJ. Protein Adsorption to Charged Gold Nanospheres as a Function of Protein Deformability. Langmuir 2017; 33:7751-7761. [PMID: 28704605 DOI: 10.1021/acs.langmuir.7b01909] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The corona that forms as protein adsorbs to gold nanospheres (AuNSs) is directly influenced by the surface chemistry of the AuNS. Tools to predict adsorption outcomes are needed for intelligent design of nanomaterials for biological applications. We hypothesized that the denaturation behavior of a protein might be a useful predictor of adsorption behavior to AuNSs, and used this idea to study protein adsorption to anionic citrate-capped AuNSs and to cationic poly(allylamine hydrochloride) (PAH) wrapped AuNSs. Three proteins (α-amylase (A-Amy), β-lactoglobulin (BLG), and bovine serum albumin (BSA)), representing three different classes of acid denaturation behavior, were selected with BLG being the least deformable and BSA being the most deformable. Protein adsorption to AuNSs was monitored via UV-vis spectrophotometry and dynamic light scattering. Changes to the protein structure upon AuNS interaction were monitored via circular dichroism spectroscopy. Binding constants were determined using the Langmuir adsorption isotherm, resulting in BSA > BLG ≫ A-Amy affinities for citrate-capped gold nanospheres. PAH-coated AuNSs displayed little affinity for these proteins at similar concentrations as citrate-coated AuNSs and became agglomerated at high protein concentrations. The enzymatic activity of A-Amy/citrate AuNS conjugates was measured via colorimetric assay, and found to be 11% of free A-Amy, suggesting that binding restricts access to the active site. Across both citrate AuNSs and PAH AuNSs, the changes in secondary structure were greatest for BSA > A-Amy > BLG, which does follow the trends predicted by acid denaturation characteristics.
Collapse
Affiliation(s)
- Jordan M Dennison
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jennifer M Zupancic
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jonathan H Dwyer
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 Mathews Avenue, Urbana, Illinois 61801, United States
| |
Collapse
|
4
|
Burrows ND, Lin W, Hinman JG, Dennison JM, Vartanian AM, Abadeer NS, Grzincic EM, Jacob LM, Li J, Murphy CJ. Surface Chemistry of Gold Nanorods. Langmuir 2016; 32:9905-9921. [PMID: 27568788 DOI: 10.1021/acs.langmuir.6b02706] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Gold nanorods have garnered a great deal of scientific interest because of their unique optical properties, and they have the potential to greatly impact many areas of science and technology. Understanding the structure and chemical makeup of their surfaces as well as how to tailor them is of paramount importance in the development of their successful applications. This Feature Article reviews the current understanding of the surface chemistry of as-synthesized gold nanorods, methods of tailoring the surface chemistry of gold nanorods with various inorganic and organic coatings/ligands, and the techniques employed to characterize ligands on the surface of gold nanorods as well as the associated measurement challenges. Specifically, we address the challenges of determining how thick the ligand shell is, how many ligands per nanorod are present on the surface, and where the ligands are located in regiospecific and mixed-ligand systems. We conclude with an outlook on the development of the surface chemistry of gold nanorods leading to the development of a synthetic nanoparticle surface chemistry toolbox analogous to that of synthetic organic chemistry and natural product synthesis.
Collapse
Affiliation(s)
- Nathan D Burrows
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Joshua G Hinman
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jordan M Dennison
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Ariane M Vartanian
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Nardine S Abadeer
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Elissa M Grzincic
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Lisa M Jacob
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Ji Li
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, 600 S. Mathews Avenue, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| |
Collapse
|
5
|
Burrows ND, Vartanian AM, Abadeer NS, Grzincic EM, Jacob LM, Lin W, Li J, Dennison JM, Hinman JG, Murphy CJ. Anisotropic Nanoparticles and Anisotropic Surface Chemistry. J Phys Chem Lett 2016; 7:632-41. [PMID: 26817922 DOI: 10.1021/acs.jpclett.5b02205] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Anisotropic nanoparticles are powerful building blocks for materials engineering. Unusual properties emerge with added anisotropy-often to an extraordinary degree-enabling countless new applications. For bottom-up assembly, anisotropy is crucial for programmability; isotropic particles lack directional interactions and can self-assemble only by basic packing rules. Anisotropic particles have long fascinated scientists, and their properties and assembly behavior have been the subjects of many theoretical studies over the years. However, only recently has experiment caught up with theory. We have begun to witness tremendous diversity in the synthesis of nanoparticles with controlled anisotropy. In this Perspective, we highlight the synthetic achievements that have galvanized the field, presenting a comprehensive discussion of the mechanisms and products of both seed-mediated and alternative growth methods. We also address recent breakthroughs and challenges in regiospecific functionalization, which is the next frontier in exploiting nanoparticle anisotropy.
Collapse
Affiliation(s)
- Nathan D Burrows
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Ariane M Vartanian
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Nardine S Abadeer
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Elissa M Grzincic
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Lisa M Jacob
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Wayne Lin
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Ji Li
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Jordan M Dennison
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Joshua G Hinman
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign , 600 South Matthews Avenue, Urbana, Illinois 61801, United States
| |
Collapse
|
6
|
Tompkins BD, Dennison JM, Fisher ER. H2O plasma modification of track-etched polymer membranes for increased wettability and improved performance. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.10.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
7
|
Ross MW, Berman SM, Aral SO, Courtney PE, Dennison JM, Klovdahl AS, Williams ML, St Lawrence JS. Process, efficacy and sample demographics of three approaches to behavioural surveillance for gonorrhoea: case interviews, place surveys, and network studies. Int J STD AIDS 2007; 18:846-50. [PMID: 18073020 DOI: 10.1258/095646207782716947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We investigated the process and time required to collect 450 interviews in a project to determine the most efficacious behavioural surveillance approaches to detect changes in gonorrhoea prevalence. In total, 150 respondents were recruited in each method. For each of place surveys (bars), gonorrhoea case interviews, and network studies based on seeds from the case and place interviews, we determined the recruitment rate and process. Urine testing for gonorrhoea and chlamydia took place in the place interviews. We present data from Houston, Texas that illustrate the sample characteristics, recruitment rates, and, where appropriate, infection rates. Data indicate that there was high uptake and a rapid recruitment rate from the place surveys, an intermediate rate from the network studies, and that the gonorrhoea case interviews were the most inefficient accrual method for behavioural surveillance. Sample characteristics and biases in each method are described, and conclusions drawn for the relative efficacy of each method for gonorrhoea behavioural surveillance.
Collapse
Affiliation(s)
- Michael W Ross
- Center for Health Promotion and Prevention Research, School of Public Health, University of Texas, Post Box 20036, Houston, TX 77225, USA.
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Moura-da-Silva AM, Laing GD, Paine MJ, Dennison JM, Politi V, Crampton JM, Theakston RD. Processing of pro-tumor necrosis factor-alpha by venom metalloproteinases: a hypothesis explaining local tissue damage following snake bite. Eur J Immunol 1996; 26:2000-5. [PMID: 8814237 DOI: 10.1002/eji.1830260905] [Citation(s) in RCA: 109] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Venom-induced necrosis is a common local debilitating sequela of bites by many vipers, frequently resulting in severe permanent scarring and deformity. Antivenoms are not effective under these circumstances unless administered within a few minutes of the bite; this is unlikely to occur in the rural tropics where most victims take a long time to reach medical care. We have shown that two venom zinc metalloproteinases (jararhagin from Bothrops jararaca venom and a metalloproteinase from Echis pyramidum leakeyi venom) successfully cleaved the recombinant glutathione-S-transferase-tumor necrosis factor-alpha fusion protein (GST-TNF-alpha) substrate to form biologically active TNF-alpha which was shown to be neutralized by ovine TNF-alpha Fab antibodies. This resulted in a reduction of venom-induced necrosis in mice when injected intravenously or intradermally both before and after intradermal injections of E.p.leakeyi venom. A peptidomimetic (POL 647) was also found to inhibit the Echis metalloproteinase, thus preventing the processing of the TNF precursor; this was shown using a TNF-alpha-sensitive cell culture assay and electrophoresis. These observations demonstrate the possible importance of TNF-alpha in the development of the resulting necrotic lesion and leads to the hypothesis that increased levels of venom metalloproteinases following snake bite release active TNF-alpha. This cytokine may contribute to the local necrosis and also induce the production of endogenous matrix metalloproteinases, which in turn generate a positive feedback mechanism resulting in continued cleavage of pro-TNF-alpha. The results indicate that inhibition or neutralization of endogenous TNF-alpha appears to result in a significant reduction in venom-induced necrosis. This could help to explain the clinical observations that treatment of local necrosis following snake bite by antivenom is only minimally successful.
Collapse
|