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Padrez Y, Golubewa L, Bahdanava A, Jankunec M, Matulaitiene I, Semenov D, Karpicz R, Kulahava T, Svirko Y, Kuzhir P. Nanodiamond surface as a photoluminescent pH sensor. NANOTECHNOLOGY 2023; 34:195702. [PMID: 36745919 DOI: 10.1088/1361-6528/acb94b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
A systematic spectroscopic characterization of highly homogeneous water suspensions of 'buckydiamonds' comprising sp3cubic nanodiamond (ND) core covered with disordered sp2shell densely decorated with oxygen-containing groups demonstrates the excitation-wavelength-dependent photoluminescence (PL) given by at least four types of specific structures on the ND surface (hydroxyl, C=O containing ketones, carboxylic anhydrides, and carboxyl groups). PL properties of NDs suspensions possess concentration-dependent behavior revealing tendency of NDs to agglomerate. PL of NDs has been found to be strongly sensitive to pH of the environment in wide range of pH values, i.e. 2-11. We disclosed the mechanisms of pH sensitivity of the 'buckydiamond' and proved that it can serve as all-optical sensor of tiny pH variations suitable for further exploitation for pH sensing locally in the area where NDs have been delivered for any purpose, e.g. bioimaging or therapeutic needs.
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Affiliation(s)
- Yaraslau Padrez
- Department of Molecular Compounds Physics, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Lena Golubewa
- Department of Molecular Compounds Physics, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Joensuu, Finland
| | - Anastasiya Bahdanava
- Department of Molecular Compounds Physics, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Marija Jankunec
- Institute of Biochemistry, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Ieva Matulaitiene
- Department of Organic Chemistry, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Dmitry Semenov
- School of Computing, Faculty of Science and Forestry, University of Eastern Finland, Kuopio, Finland
| | - Renata Karpicz
- Department of Molecular Compounds Physics, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Tatsiana Kulahava
- Department of Molecular Compounds Physics, State research institute Center for Physical Sciences and Technology, Vilnius, Lithuania
| | - Yuri Svirko
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Joensuu, Finland
| | - Polina Kuzhir
- Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, Joensuu, Finland
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Hottechamps J, Noblet T, Méthivier C, Boujday S, Dreesen L. All-quantum dot based Förster resonant energy transfer: key parameters for high-efficiency biosensing. NANOSCALE 2023; 15:2614-2623. [PMID: 36648212 DOI: 10.1039/d2nr06161a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
While colloidal quantum dots (QDs) are commonly used as fluorescent donors within biosensors based on Förster resonant energy transfer (FRET), they are hesitantly employed as acceptors. On the sole basis of Förster theory and the well-known behaviour of organic dyes, it is often argued that the QD absorption band over the UV-visible range is too wide. Discarding these preconceptions inherited from classical fluorophores, we experimentally examine the FRET process occurring between donor and acceptor CdTe QDs and provide a mathematical description of it. We evidence that the specific features of QDs unexpectedly lead to the enhancement of acceptors' emission (up to +400%), and are thus suitable for the design of highly efficient all-QD based FRET sensors. Our model enables us to identify the critical parameters maximizing the contrast between positive and negative biosensing readouts: the concentrations of donors and acceptors, their spectral overlap, the densities of their excitonic states, their dissipative coupling with the medium and the statistics of QD-QD chemical pairing emerge as subtle and determinant parameters. We relate them quantitatively to the measured QD-QD FRET efficiency and discuss how they must be optimized for biosensing applications.
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Affiliation(s)
- Julie Hottechamps
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 Août 17, 4000 Liège, Belgium.
| | - Thomas Noblet
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 Août 17, 4000 Liège, Belgium.
| | - Christophe Méthivier
- Sorbonne Universités, UPMC Univ. Paris 6, UMR CNRS 7197 Laboratoire de Réactivité de Surface, F75005 Paris, France
| | - Souhir Boujday
- Sorbonne Universités, UPMC Univ. Paris 6, UMR CNRS 7197 Laboratoire de Réactivité de Surface, F75005 Paris, France
| | - Laurent Dreesen
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 Août 17, 4000 Liège, Belgium.
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Sanmartín-Matalobos J, Bermejo-Barrera P, Aboal-Somoza M, Fondo M, García-Deibe AM, Corredoira-Vázquez J, Alves-Iglesias Y. Semiconductor Quantum Dots as Target Analytes: Properties, Surface Chemistry and Detection. NANOMATERIALS 2022; 12:nano12142501. [PMID: 35889725 PMCID: PMC9318497 DOI: 10.3390/nano12142501] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 07/17/2022] [Accepted: 07/19/2022] [Indexed: 02/04/2023]
Abstract
Since the discovery of Quantum Dots (QDs) by Alexey I. Ekimov in 1981, the interest of researchers in that particular type of nanomaterials (NMs) with unique optical and electrical properties has been increasing year by year. Thus, since 2009, the number of scientific articles published on this topic has not been less than a thousand a year. The increasing use of QDs due to their biomedical, pharmaceutical, biological, photovoltaics or computing applications, as well as many other high-tech uses such as for displays and solid-state lighting (SSL), has given rise to a considerable number of studies about its potential toxicity. However, there are a really low number of reported studies on the detection and quantification of QDs, and these include ICP–MS and electrochemical analysis, which are the most common quantification techniques employed for this purpose. The knowledge of chemical phenomena occurring on the surface of QDs is crucial for understanding the interactions of QDs with species dissolved in the dispersion medium, while it paves the way for a widespread use of chemosensors to facilitate its detection. Keeping in mind both human health and environmental risks of QDs as well as the scarcity of analytical techniques and methodological approaches for their detection, the adaptation of existing techniques and methods used with other NMs appears necessary. In order to provide a multidisciplinary perspective on QD detection, this review focused on three interrelated key aspects of QDs: properties, surface chemistry and detection.
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Affiliation(s)
- Jesús Sanmartín-Matalobos
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
- Correspondence: (J.S.-M.); (A.M.G.-D.)
| | - Pilar Bermejo-Barrera
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
| | - Manuel Aboal-Somoza
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
| | - Matilde Fondo
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Ana M. García-Deibe
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
- Correspondence: (J.S.-M.); (A.M.G.-D.)
| | - Julio Corredoira-Vázquez
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
| | - Yeneva Alves-Iglesias
- Coordination and Supramolecular Chemistry Group (SupraMetal), Department of Inorganic Chemistry, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (M.F.); (J.C.-V.); (Y.A.-I.)
- Trace Element, Speciation and Spectroscopy Group (GETEE), Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, Avenida das Ciencias s/n, 15782 Santiago de Compostela, Spain; (P.B.-B.); (M.A.-S.)
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Hottechamps J, Noblet T, Erard M, Dreesen L. Quenched or alive quantum dots: The leading roles of ligand adsorption and photoinduced protonation. J Colloid Interface Sci 2021; 594:245-253. [PMID: 33765644 DOI: 10.1016/j.jcis.2021.02.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 10/22/2022]
Abstract
HYPOTHESIS The fluorescence emission of water-soluble CdTe quantum dots (QDs) capped with mercaptocarboxylic acids (MCAs) is known to be pH-dependent. However, this behaviour is quite different from a study to another, so that literature suffers from a lack of coherence. Here we assume that the QD fluorescence efficiency is actually driven by the acid-base equilibrium of MCA thiol groups, and that light-excited QDs open a non-radiative relaxation path through photoinduced protonation. EXPERIMENTS We address this issue by examining colloidal CdTe QDs with (time-resolved) fluorescence spectroscopy under various conditions of acidity and light excitation. FINDINGS It appears that the emission of QDs is quenched below a critical pH value of 6.87, and that light excitation power strengthens this quenching. We thus demonstrate the existence of an additional photochemical process and developed a mathematical modeling accounting for all our experimental results. With only three parameters, it is possible to accurately predict the fluorescence decay of QDs over time, at any pH. Further, we also related the critical pH value of 6.87 to QD surface properties, explaining why observations may differ from a study to another and making the literature much more coherent.
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Affiliation(s)
- Julie Hottechamps
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium
| | - Thomas Noblet
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium
| | - Marie Erard
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, UMR 8000, 91405 Orsay, France
| | - Laurent Dreesen
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium.
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Spatial Dependence of the Dipolar Interaction between Quantum Dots and Organic Molecules Probed by Two-Color Sum-Frequency Generation Spectroscopy. Symmetry (Basel) 2021. [DOI: 10.3390/sym13020294] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Given the tunability of their optical properties over the UV–Visible–Near IR spectral range, ligand-capped quantum dots (QDs) are employed for the design of optical biosensors with low detection threshold. Thanks to non-linear optical spectroscopies, the absorption properties of QDs are indeed used to selectively enhance the local vibrational response of molecules located in their vicinity. Previous studies led to assume the existence of a vibroelectronic QD–molecule coupling based on dipolar interaction. However, no systematic study on the strength of this coupling has been performed to date. In order to address this issue, we use non-linear optical Two-Color Sum-Frequency Generation (2C-SFG) spectroscopy to probe thick QD layers deposited on calcium fluoride (CaF2) prisms previously functionalized by a self-assembled monolayer of phenyltriethoxysilane (PhTES) molecules. Here, 2C-SFG is performed in Attenuated Total Reflection (ATR) configuration. By comparing the molecular vibrational enhancement measured for QD–ligand coupling and QD–PhTES coupling, we show that the spatial dependence of the QD–molecule interactions (∼1/r3, with r the QD–molecule distance) is in agreement with the hypothesis of a dipole–dipole interaction.
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Hottechamps J, Noblet T, Brans A, Humbert C, Dreesen L. How Quantum Dots Aggregation Enhances Förster Resonant Energy Transfer. Chemphyschem 2020; 21:853-862. [DOI: 10.1002/cphc.202000067] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Julie Hottechamps
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
| | - Thomas Noblet
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
| | - Alain Brans
- Center for Protein Engineering (CIP)InBioSUniversity of Liege, Quartier Agora Allée du six Août 13, B6a 4000 Liège Belgium
| | - Christophe Humbert
- Université Paris-SaclayCNRSInstitut de Chimie Physique UMR 8000 91405 Orsay France
| | - Laurent Dreesen
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
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Inner filter effect in fluorescence spectroscopy: As a problem and as a solution. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2019. [DOI: 10.1016/j.jphotochemrev.2019.100318] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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