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Ming L, Zabala-Gutierrez I, Rodríguez-Sevilla P, Retama JR, Jaque D, Marin R, Ximendes E. Neural Networks Push the Limits of Luminescence Lifetime Nanosensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2306606. [PMID: 37787978 DOI: 10.1002/adma.202306606] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/18/2023] [Indexed: 10/04/2023]
Abstract
Luminescence lifetime-based sensing is ideally suited to monitor biological systems due to its minimal invasiveness and remote working principle. Yet, its applicability is limited in conditions of low signal-to-noise ratio (SNR) induced by, e.g., short exposure times and presence of opaque tissues. Herein this limitation is overcome by applying a U-shaped convolutional neural network (U-NET) to improve luminescence lifetime estimation under conditions of extremely low SNR. Specifically, the prowess of the U-NET is showcased in the context of luminescence lifetime thermometry, achieving more precise thermal readouts using Ag2 S nanothermometers. Compared to traditional analysis methods of decay curve fitting and integration, the U-NET can extract average lifetimes more precisely and consistently regardless of the SNR value. The improvement achieved in the sensing performance using the U-NET is demonstrated with two experiments characterized by extreme measurement conditions: thermal monitoring of free-falling droplets, and monitoring of thermal transients in suspended droplets through an opaque medium. These results broaden the applicability of luminescence lifetime-based sensing in fields including in vivo experimentation and microfluidics, while, hopefully, spurring further research on the implementation of machine learning (ML) in luminescence sensing.
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Affiliation(s)
- Liyan Ming
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Autonomous University of Madrid, Madrid, 28049, Spain
- Departamento de Química en Ciencias Farmacéuticas, Complutense University of Madrid, Madrid, 28040, Spain
| | - Irene Zabala-Gutierrez
- Nanomaterials for Bioimaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Hospital Ramón y Cajal, Madrid, 28034, Spain
| | - Paloma Rodríguez-Sevilla
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Autonomous University of Madrid, Madrid, 28049, Spain
| | - Jorge Rubio Retama
- Nanomaterials for Bioimaging Group (nanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Hospital Ramón y Cajal, Madrid, 28034, Spain
| | - Daniel Jaque
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Autonomous University of Madrid, Madrid, 28049, Spain
- Departamento de Química en Ciencias Farmacéuticas, Complutense University of Madrid, Madrid, 28040, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Autonomous University of Madrid, Madrid, 28049, Spain
| | - Riccardo Marin
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Autonomous University of Madrid, Madrid, 28049, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Autonomous University of Madrid, Madrid, 28049, Spain
| | - Erving Ximendes
- Nanomaterials for Bioimaging Group (nanoBIG), Departamento de Física de Materiales, Facultad de Ciencias, Autonomous University of Madrid, Madrid, 28049, Spain
- Departamento de Química en Ciencias Farmacéuticas, Complutense University of Madrid, Madrid, 28040, Spain
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París Ogáyar M, Mendez-Gonzalez D, Zabala Gutierrez I, Artiga Á, Rubio-Retama J, Calderón OG, Melle S, Serrano A, Espinosa A, Jaque D, Marin R. Ion-induced bias in Ag 2S luminescent nanothermometers. NANOSCALE 2023; 15:17956-17962. [PMID: 37905397 DOI: 10.1039/d3nr03728b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Luminescence nanothermometry allows measuring temperature remotely and in a minimally invasive way by using the luminescence signal provided by nanosized materials. This technology has allowed, for example, the determination of intracellular temperature and in vivo monitoring of thermal processes in animal models. However, in the biomedical context, this sensing technology is crippled by the presence of bias (cross-sensitivity) that reduces the reliability of the thermal readout. Bias occurs when the impact of environmental conditions different from temperature also modifies the luminescence of the nanothermometers. Several sources that cause loss of reliability have been identified, mostly related to spectral distortions due to interaction between photons and biological tissues. In this work, we unveil an unexpected source of bias induced by metal ions. Specifically, we demonstrate that the reliability of Ag2S nanothermometers is compromised during the monitoring of photothermal processes produced by iron oxide nanoparticles. The observed bias occurs due to the heat-induced release of iron ions, which interact with the surface of the Ag2S nanothermometers, enhancing their emission. The results herein reported raise a warning to the community working on luminescence nanothermometry, since they reveal that the possible sources of bias in complex biological environments, rich in molecules and ions, are more numerous than previously expected.
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Affiliation(s)
- Marina París Ogáyar
- NanoBIG, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, Spain.
| | - Diego Mendez-Gonzalez
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Ctra. De Colmenar Viejo, Km. 9100, Madrid, Spain
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramon y Cajal 2, Madrid 28040, Spain
| | - Irene Zabala Gutierrez
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramon y Cajal 2, Madrid 28040, Spain
| | - Álvaro Artiga
- NanoBIG, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, Spain.
| | - Jorge Rubio-Retama
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Ctra. De Colmenar Viejo, Km. 9100, Madrid, Spain
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramon y Cajal 2, Madrid 28040, Spain
| | - Oscar G Calderón
- Department of Optics, Faculty of Optics and Optometry, Complutense University of Madrid, Arcos de Jalón 118, Madrid E-28037, Spain
| | - Sonia Melle
- Department of Optics, Faculty of Optics and Optometry, Complutense University of Madrid, Arcos de Jalón 118, Madrid E-28037, Spain
| | - Aida Serrano
- Instituto de Cerámica y Vidrio | CSIC, Campus de Cantoblanco, C. Kelsen, 5, 28049 Madrid, Spain
| | - Ana Espinosa
- Instituto de Ciencia de Materiales de Madrid | CSIC, Campus de Cantoblanco, C. Sor Juana Inés de la Cruz, 3, 28049 Madrid, Spain
| | - Daniel Jaque
- NanoBIG, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, Spain.
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Ctra. De Colmenar Viejo, Km. 9100, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Riccardo Marin
- NanoBIG, Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Brites CDS, Marin R, Suta M, Carneiro Neto AN, Ximendes E, Jaque D, Carlos LD. Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting-Edge Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302749. [PMID: 37480170 DOI: 10.1002/adma.202302749] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/05/2023] [Indexed: 07/23/2023]
Abstract
Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of the luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes and risetimes) of a phosphor to measure temperature. This technique provides precise thermal readouts with superior spatial resolution in short acquisition times. Although luminescence thermometry is just starting to become a more mature subject, it exhibits enormous potential in several areas, e.g., optoelectronics, photonics, micro- and nanofluidics, and nanomedicine. This work reviews the latest trends in the field, including the establishment of a comprehensive theoretical background and standardized practices. The reliability, repeatability, and reproducibility of the technique are also discussed, along with the use of multiparametric analysis and artificial-intelligence algorithms to enhance thermal readouts. In addition, examples are provided to underscore the challenges that luminescence thermometry faces, alongside the need for a continuous search and design of new materials, experimental techniques, and analysis procedures to improve the competitiveness, accessibility, and popularity of the technology.
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Affiliation(s)
- Carlos D S Brites
- Phantom-g, CICECO, Departamento de Física, Universidade de Aveiro, Campus Santiago, Aveiro, 3810-193, Portugal
| | - Riccardo Marin
- Departamento de Física de Materiales, Nanomaterials for Bioimaging Group (NanoBIG), Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Markus Suta
- Inorganic Photoactive Materials, Institute of Inorganic Chemistry and Structural Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Albano N Carneiro Neto
- Phantom-g, CICECO, Departamento de Física, Universidade de Aveiro, Campus Santiago, Aveiro, 3810-193, Portugal
| | - Erving Ximendes
- Departamento de Física de Materiales, Nanomaterials for Bioimaging Group (NanoBIG), Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Nanomaterials for Bioimaging Group (NanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Hospital Ramón y Cajal, Madrid, 28034, Spain
| | - Daniel Jaque
- Departamento de Física de Materiales, Nanomaterials for Bioimaging Group (NanoBIG), Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Nanomaterials for Bioimaging Group (NanoBIG), Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Hospital Ramón y Cajal, Madrid, 28034, Spain
| | - Luís D Carlos
- Phantom-g, CICECO, Departamento de Física, Universidade de Aveiro, Campus Santiago, Aveiro, 3810-193, Portugal
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