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Halder K, Sabnam K, Das A, Goswami DK, Dasgupta S. Thin Film Formation of HSA in the Presence of CTAB-Capped Gold Nanorods through Phase Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:14847-14862. [PMID: 38952216 DOI: 10.1021/acs.langmuir.4c00694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Phase behavior in protein-nanoparticle systems in light of protein corona formation has been investigated. We report the formation of HSA thin films following the addition of a solid protein to a solution of CTAB-capped gold nanorods (AuNRs) via phase separation. The phase separation behavior was observed through UV-vis spectroscopy, turbidity assays, and DLS studies. UV-vis spectra for the protein-AuNR solution indicated a possible self-assembly formation by CTAB-HSA complexes and AuNR-HSA conjugates. The turbidity was found to increase linearly up to 30-50% v/v for each component. The growth phase slope is proportional to the concentration of the components, AuNRs, and HSA, with no lag phase. Dynamic light scattering (DLS) shows the formation of larger aggregates with time, implying a segregated phase of AuNR-HSA and a CTAB-HSA-AuNR network. ζ-potential values confirm surface modification, implying protein corona formation on nanorods. The thin films were also characterized using SEM, AFM, SAXS, XPS, FTIR, and TGA studies. SEM images show a smooth surface with a reduced number of pores, indicating the compactness of the deposited structure. AFM shows two different structural pattern formations with the deposition, indicating possible self-assembly of the protein-conjugated nanoparticles. FTIR studies indicate a change in the hydrogen bonding network and confirm the CTAB-HSA-AuNR complex network formation. The XPS studies indicate Au-S bond formation, along with Au-S-S-Au interactions. SAXS studies indicate the formation of aggregates (oligomers), as well as the presence of dominant attractive intermolecular interactions in the thin films.
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Affiliation(s)
- Krishna Halder
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Kabira Sabnam
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Abhirup Das
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Dipak K Goswami
- Department of Physics, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Swagata Dasgupta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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2
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Bao Y, Oluwafemi A. Recent advances in surface modified gold nanorods and their improved sensing performance. Chem Commun (Camb) 2024; 60:469-481. [PMID: 38105689 DOI: 10.1039/d3cc04056a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Gold nanorods (AuNRs) have received tremendous attention recently in the fields of sensing and detection applications due to their unique characteristic of surface plasmon resonance. Surface modification of the AuNRs is a necessary path to effectively utilize their properties for these applications. In this Article, we have focused both on demonstrating the recent advances in methods for surface functionalization of AuNRs as well as their use for improved sensing performance using various techniques. The main surface modification methods discussed include ligand exchange with the assistance of a thiol-group, the layer by layer assembly method, and depositing inorganic materials with the desired surface and morphology. Covered techniques that can then be applied for using these functionalized AuNRs include colourimetric sensing, refractive index sensing and surface enhance Raman scattering sensing. Finally, the outlook on the future development of surface modified AuNRs for improved sensing performance is considered.
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Affiliation(s)
- Ying Bao
- Department of Chemistry, Western Washington University, Bellingham, Washington, 98225, USA.
| | - Ayomide Oluwafemi
- Department of Chemistry, Western Washington University, Bellingham, Washington, 98225, USA.
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3
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Kincanon M, Murphy CJ. Nanoparticle Size Influences the Self-Assembly of Gold Nanorods Using Flexible Streptavidin-Biotin Linkages. ACS NANO 2023. [PMID: 38010073 DOI: 10.1021/acsnano.3c09096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The self-assembly of colloidal nanocrystals remains of robust interest due to its potential in creating hierarchical nanomaterials that have advanced function. For gold nanocrystals, junctions between nanoparticles yield large enhancements in local electric fields under resonant illumination, which is suitable for surface-enhanced spectroscopies for molecular sensors. Gold nanorods can provide such plasmonic fields at near-infrared wavelengths of light for longitudinal excitation. Through the use of careful concentration and stoichiometric control, a method is reported herein for selective biotinylation of the ends of gold nanorods for simple, consistent, and high-yielding self-assembly upon addition of the biotin-binding protein streptavidin. This method was applied to four different sized nanorods of similar aspect ratio and analyzed through UV-vis spectroscopy for qualitative confirmation of self-assembly and transmission electron microscopy to determine the degree of self-assembly in end-linked nanorods. The yield of end-linked assemblies approaches 90% for the largest nanorods and approaches 0% for the smallest nanorods. The number of nanorods linked in one chain also increases with an increased nanoparticle size. The results support the notion that the lower ligand density at the ends of the larger nanorods yields preferential substitution reactions at those ends and hence preferential end-to-end assembly, while the smallest nanorods have a relatively uniform ligand density across their surfaces, leading to spatially random substitution reactions.
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Affiliation(s)
- Maegen Kincanon
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
| | - Catherine J Murphy
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, United States
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Mahmoud NN, Abu-Dahab R, Hamadneh LA, Abuarqoub D, Jafar H, Khalil EA. Insights into the Cellular Uptake, Cytotoxicity, and Cellular Death Modality of Phospholipid-Coated Gold Nanorods toward Breast Cancer Cell Lines. Mol Pharm 2019; 16:4149-4164. [PMID: 31398052 DOI: 10.1021/acs.molpharmaceut.9b00470] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Gold nanorods (GNRs) have gained pronounced recognition in the diagnosis and treatment of cancers driven by their distinctive properties. Herein, a gold-based nanosystem was prepared by utilizing a phospholipid moiety linked to thiolated polyethylene glycol, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-PEG-SH, as a surface decorating agent. The synthesized phospholipid-PEG-GNRs displayed good colloidal stability upon exposure to the tissue culture medium. Cytotoxicity of phospholipid-PEG-GNRs was investigated toward MCF-7 and T47D breast cancer cells using sulforhodamine B test. The results revealed that phospholipid-PEG-GNRs demonstrated high cytotoxicity to MCF-7 cells compared to T47D cells, and minimal cytotoxicity to human dermal fibroblasts. The cellular uptake studies performed by imaging and quantitative analysis demonstrated massive internalization of phospholipid-coated GNRs into MCF-7 cells in comparison to T47D cells. The cellular death modality of cancer cells after treatment with phospholipid-PEG-GNRs was evaluated using mitochondrial membrane potential assay (JC-1 dye), gene expression analysis, and flow cytometry study. The overall results suggest that phospholipid-modified GNRs enhanced mainly the cellular apoptotic events in MCF-7 cells in addition to necrosis, whereas cellular necrosis and suppression of cellular invasion contributed to the cellular death modality in the T47D cell line upon treatment with phospholipid-PEG-GNRs. The phospholipid-coated GNRs interact in a different manner with breast cancer cell lines and could be considered for breast cancer treatment.
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Affiliation(s)
- Nouf N Mahmoud
- Faculty of Pharmacy , Al-Zaytoonah University of Jordan , Amman 11733 , Jordan
| | | | - Lama A Hamadneh
- Faculty of Pharmacy , Al-Zaytoonah University of Jordan , Amman 11733 , Jordan
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5
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Cheng MJ, Bal NN, Prabakaran P, Kumar R, Webster TJ, Sridhar S, Ebong EE. Ultrasmall gold nanorods: synthesis and glycocalyx-related permeability in human endothelial cells. Int J Nanomedicine 2019; 14:319-333. [PMID: 30697044 PMCID: PMC6340363 DOI: 10.2147/ijn.s184455] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Background Clinical data show shed endothelial glycocalyx (GCX) components in blood samples of atherosclerotic patients, linking atherosclerotic development to endothelial GCX integrity. Healthy GCX has pores no >7 nm, and shed GCX has even larger pores. Therefore, we suggest targeting and treating atherosclerosis-prone blood vessels by using nanoscale vehicles to deliver drugs via the nanoscale GCX as it becomes dysfunctional. Materials and methods To test our idea, we investigated permeability of nanoparticles in endothelium, as related to a GCX expression. The present work involves nanorods, which are expected to interact with larger portions of endothelial cell (EC) membranes, due to surface area of the nanorod long axis. Conventional nanorod diameters are orders of magnitude larger than the GCX pore size, so we adapted conventional synthesis methods to fabricate ultrasmall gold nanorods (GNRs). Our ultrasmall GNRs have an aspect ratio of 3.4, with a length of 27.9±3.1 nm and a diameter of 8.2±1.4 nm. In addition, we produced GNRs that are biocompatible and fluorescently visible, by coating the surface with functionalized polyethylene glycol and Alexa Fluor 647. To study GNR–GCX interactions, we used human ECs, for species relevance. Results Under life-like flow conditions, the human ECs are densely covered with a 1.3 µm thick layer of GCX, which coincides with minimal GNR permeability. When the GCX is weakened from lack of flow (static culture) or the presence of GCX degradation enzyme in the flow stream, the GCX shows 40% and 60% decreased thickness, respectively. GCX weakness due to lack of flow only slightly increases cellular permeability to GNRs, while GCX weakness due to the presence of enzyme in the flow leads to substantial increase in GNR permeability. Conclusion These results clarify that the GCX structure is an avenue through which drug-carrying nanoparticles can be delivered for targeting affected blood vessels to treat atherosclerosis.
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Affiliation(s)
- Ming J Cheng
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA,
| | - Nandita N Bal
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA,
| | - Priya Prabakaran
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA,
| | - Rajiv Kumar
- Department of Physics, Northeastern University, Boston, MA, USA, .,Millipore Sigma, Milwaukee,WI, USA
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA, .,Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Srinivas Sridhar
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA, .,Department of Physics, Northeastern University, Boston, MA, USA,
| | - Eno E Ebong
- Department of Chemical Engineering, Northeastern University, Boston,MA, USA, .,Department of Physics, Northeastern University, Boston, MA, USA, .,Department of Neuroscience, Albert Einstein College of Medicine, New York, NY, USA,
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Abstract
Sorption of nanoparticles on mineral surfaces has been well recognized for its environmental implication. For certain gold ore deposits, sorption of gold nanoparticles (AuNPs) on pyrite may constitute a critical step in the metallogenesis process, yet it has not been adequately investigated. In this work, we synthesized negatively charged, positively charged AuNPs and pyrite respectively, and experimentally studied sorption of AuNPs on pyrite in an anaerobic environment. The effects of AuNPs charge characteristics, pH, hexadecyl trimethyl ammonium bromide (CTAB) concentration, and ionic strength were evaluated. For the negatively charged AuNPs, almost no sorption was observed owing to the electrostatic repulsion between the AuNPs and pyrite surface (with a measured isoelectric point of 2.0). In contrast, positively charged AuNPs could be significantly adsorbed on pyrite through electrostatic attraction, with the sorption extent decreasing with the increase of pH (2.2–9.1). However, the adsorption of CTAB from the solution was found to increase with the increase of pH. Furthermore, deliberately added CTAB seemed to inhibit the sorption of AuNPs. Our study not only demonstrates that the electrostatic interaction is the dominant mechanism in the sorption of AuNPs on pristine pyrite, but also reveals the important competitive relation between AuNPs and CTAB in the sorption process.
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Zaghdoudi M, Moreaud L, Even-Hernandez P, Marchi V, Fourcade F, Amrane A, Maghraoui-Meherzi H, Geneste F. Immobilization of synthetic gold nanoparticles on a three-dimensional porous electrode. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.01.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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8
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Dragoman RM, Grogg M, Bodnarchuk MI, Tiefenboeck P, Hilvert D, Dirin DN, Kovalenko MV. Surface-Engineered Cationic Nanocrystals Stable in Biological Buffers and High Ionic Strength Solutions. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2017; 29:9416-9428. [PMID: 29606797 PMCID: PMC5871342 DOI: 10.1021/acs.chemmater.7b03504] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 10/13/2017] [Indexed: 05/27/2023]
Abstract
Progress in colloidal synthesis in the last two decades has enabled high-quality semiconductor, plasmonic, and magnetic nanocrystals (NCs). As synthesized, these NCs are usually capped with long-chain apolar ligands. Postsynthetic surface functionalization is required for rendering such NCs colloidally stable in polar media such as water. However, unlike small anionic molecules and polymeric coatings, producing positively charged stable NCs, especially at high ionic strengths, has remained challenging. Here, we present a general approach to achieve aqueously stable cationic NCs using a set of small (<2.5 nm long) positively charged ligands. The applicability of this method is demonstrated for a variety of materials including semiconductor CdSe/CdS core/shell NCs, magnetic Fe@Fe3O4, Fe3O4, and FePt NCs, and three different classes of plasmonic Au NCs including large nanorods. The obtained cationic NCs typically have zeta potential values ranging from +30 to +60 mV and retain colloidal stability for days to months, depending on NC/ligand pair, in several biological buffers at elevated pH and in concentrated salt solutions. This allowed us to demonstrate site-specific staining of cellular structures using fluorescent cationic NCs with several different surface chemistries. Furthermore, colloidal stability of the obtained NCs in the presence of other charged species allowed the assembly of cationic and anionic counterparts driven primarily by electrostatic attraction. With this approach, we prepare highly uniform 3D and 2D binary mixtures of NCs through induced homogeneous aggregation and alternating-charge layer-by-layer deposition, respectively. Such binary mixtures may provide a new route in the engineering of nanocrystalline solids for electronics, thermoelectrics, and photovoltaics.
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Affiliation(s)
- Ryan M. Dragoman
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Marcel Grogg
- Laboratory
of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Maryna I. Bodnarchuk
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa-Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Peter Tiefenboeck
- Institute
of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Donald Hilvert
- Laboratory
of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Dmitry N. Dirin
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Maksym V. Kovalenko
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa-Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
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9
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de Barros HR, Piovan L, Sassaki GL, de Araujo Sabry D, Mattoso N, Nunes ÁM, Meneghetti MR, Riegel-Vidotti IC. Surface interactions of gold nanorods and polysaccharides: From clusters to individual nanoparticles. Carbohydr Polym 2016; 152:479-486. [DOI: 10.1016/j.carbpol.2016.07.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 06/28/2016] [Accepted: 07/05/2016] [Indexed: 01/19/2023]
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10
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High colloidal stability of gold nanorods coated with a peptide-ethylene glycol: Analysis by cyanide-mediated etching and nanoparticle tracking analysis. Colloids Surf B Biointerfaces 2016; 146:871-8. [DOI: 10.1016/j.colsurfb.2016.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 06/29/2016] [Accepted: 07/03/2016] [Indexed: 10/21/2022]
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11
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Hamon C, Sanz-Ortiz MN, Modin E, Hill EH, Scarabelli L, Chuvilin A, Liz-Marzán LM. Hierarchical organization and molecular diffusion in gold nanorod/silica supercrystal nanocomposites. NANOSCALE 2016; 8:7914-22. [PMID: 26961684 PMCID: PMC5317216 DOI: 10.1039/c6nr00712k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 02/26/2016] [Indexed: 05/27/2023]
Abstract
Hierarchical organization of gold nanorods was previously obtained on a substrate, allowing precise control over the morphology of the assemblies and macroscale spatial arrangement. Herein, a thorough description of these gold nanorod assemblies and their orientation within supercrystals is presented together with a sol-gel technique to protect the supercrystals with mesoporous silica films. The internal organization of the nanorods in the supercrystals was characterized by combining focused ion beam ablation and scanning electron microscopy. A mesoporous silica layer is grown both over the supercrystals and between the individual lamellae of gold nanorods inside the structure. This not only prevented the detachment of the supercrystal from the substrate in water, but also allowed small molecule analytes to infiltrate the structure. These nanocomposite substrates show superior Raman enhancement in comparison with gold supercrystals without silica owing to improved accessibility of the plasmonic hot spots to analytes. The patterned supercrystal arrays with enhanced optical and mechanical properties obtained in this work show potential for the practical implementation of nanostructured devices in spatially resolved ultradetection of biomarkers and other analytes.
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Affiliation(s)
- Cyrille Hamon
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Marta N Sanz-Ortiz
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Evgeny Modin
- Electron Microscopy and Image Processing Interdisciplinary Laboratory, Far Eastern Federal University, Sukhanova 8, 690000, Vladivostok, Russia and Electron Microscopy Laboratory, CIC NanoGUNE Consolider, Tolosa Hiribidea, 76, 20019 Donostia - San Sebastian, Spain
| | - Eric H Hill
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Leonardo Scarabelli
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain.
| | - Andrey Chuvilin
- Electron Microscopy Laboratory, CIC NanoGUNE Consolider, Tolosa Hiribidea, 76, 20019 Donostia - San Sebastian, Spain and Basque Foundation of Science, IKERBASQUE, 48013 Bilbao, Spain
| | - Luis M Liz-Marzán
- Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastian, Spain. and Basque Foundation of Science, IKERBASQUE, 48013 Bilbao, Spain and Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain
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12
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Gurunatha KL, Fournier AC, Urvoas A, Valerio-Lepiniec M, Marchi V, Minard P, Dujardin E. Nanoparticles Self-Assembly Driven by High Affinity Repeat Protein Pairing. ACS NANO 2016; 10:3176-3185. [PMID: 26863288 DOI: 10.1021/acsnano.5b04531] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Proteins are the most specific yet versatile biological self-assembling agents with a rich chemistry. Nevertheless, the design of new proteins with recognition capacities is still in its infancy and has seldom been exploited for the self-assembly of functional inorganic nanoparticles. Here, we report on the protein-directed assembly of gold nanoparticles using purpose-designed artificial repeat proteins having a rigid but modular 3D architecture. αRep protein pairs are selected for their high mutual affinity from a library of 10(9) variants. Their conjugation onto gold nanoparticles drives the massive colloidal assembly of free-standing, one-particle thick films. When the average number of proteins per nanoparticle is lowered, the extent of self-assembly is limited to oligomeric particle clusters. Finally, we demonstrate that the aggregates are reversibly disassembled by an excess of one free protein. Our approach could be optimized for applications in biosensing, cell targeting, or functional nanomaterials engineering.
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Affiliation(s)
- Kargal L Gurunatha
- Groupe NanoSciences-CEMES, CNRS UPR 8011 , 29 rue J. Marvig, B.P. 94347, F-31055 Toulouse, France
| | - Agathe C Fournier
- Groupe NanoSciences-CEMES, CNRS UPR 8011 , 29 rue J. Marvig, B.P. 94347, F-31055 Toulouse, France
| | - Agathe Urvoas
- I2BC, Univ Paris Sud, CNRS, CEA UMR 9198 , Bât. 430, F-91405 Orsay, France
| | | | - Valérie Marchi
- University Rennes 1, Institut of Chemical Sciences, UMR 6226 CNRS , Campus Beaulieu, F- 35042 Rennes, France
| | - Philippe Minard
- I2BC, Univ Paris Sud, CNRS, CEA UMR 9198 , Bât. 430, F-91405 Orsay, France
| | - Erik Dujardin
- Groupe NanoSciences-CEMES, CNRS UPR 8011 , 29 rue J. Marvig, B.P. 94347, F-31055 Toulouse, France
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13
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Gordel M, Piela K, Kołkowski R, Koźlecki T, Buckle M, Samoć M. End-to-end self-assembly of gold nanorods in isopropanol solution: experimental and theoretical studies. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2015; 17:477. [PMID: 26696774 PMCID: PMC4676789 DOI: 10.1007/s11051-015-3285-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 11/28/2015] [Indexed: 05/25/2023]
Abstract
ABSTRACT We describe here a modification of properties of colloidal gold nanorods (NRs) resulting from the chemical treatment used to carry out their transfer into isopropanol (IPA) solution. The NRs acquire a tendency to attach one to another by their ends (end-to-end assembly). We focus on the investigation of the change in position and shape of the longitudinal surface plasmon (l-SPR) band after self-assembly. The experimental results are supported by a theoretical calculation, which rationalizes the dramatic change in optical properties when the NRs are positioned end-to-end at short distances. The detailed spectroscopic characterization performed at the consecutive stages of transfer of the NRs from water into IPA solution revealed the features of the interaction between the polymers used as ligands and their contribution to the final stage, when the NRs were dispersed in IPA solution. The efficient method of aligning the NRs detailed here may facilitate applications of the self-assembled NRs as building blocks for optical materials and biological sensing.
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Affiliation(s)
- M. Gordel
- />Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Technology, WybrzeżeWyspiańskiego 27, 50-370 Wroclaw, Poland
- />Laboratoire de Biologie et Pharmacologie Appliquée, CNRS, École Normale Supérieure de Cachan, Avenue du Président Wilson 61, 94230 Cachan, France
| | - K. Piela
- />Department of Physical and Quantum Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland
| | - R. Kołkowski
- />Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Technology, WybrzeżeWyspiańskiego 27, 50-370 Wroclaw, Poland
- />Laboratoire de Photonique Quantique et Moléculaire, CNRS, École Normale Supérieure de Cachan, Avenue du Président Wilson 61, 94230 Cachan, France
| | - T. Koźlecki
- />Department of Chemical Engineering, Faculty of Chemistry, Wrocław University of Technology, Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - M. Buckle
- />Laboratoire de Biologie et Pharmacologie Appliquée, CNRS, École Normale Supérieure de Cachan, Avenue du Président Wilson 61, 94230 Cachan, France
| | - M. Samoć
- />Advanced Materials Engineering and Modelling Group, Faculty of Chemistry, Wrocław University of Technology, WybrzeżeWyspiańskiego 27, 50-370 Wroclaw, Poland
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15
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Tian Y, Luo S, Yan H, Teng Z, Pan Y, Zeng L, Wu J, Li Y, Liu Y, Wang S, Lu G. Gold nanostars functionalized with amine-terminated PEG for X-ray/CT imaging and photothermal therapy. J Mater Chem B 2015; 3:4330-4337. [DOI: 10.1039/c5tb00509d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the great potential of gold nanostars decorated with amine-terminated PEG in the application of X-ray/CT-guided photothermal therapy.
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16
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Homaei A, Etemadipour R. Improving the activity and stability of actinidin by immobilization on gold nanorods. Int J Biol Macromol 2015; 72:1176-81. [DOI: 10.1016/j.ijbiomac.2014.10.029] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 12/20/2022]
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