Upconversion Nanophosphors: An Overview

Markose, Kurias K.; Anjana, R; Jayaraj, M. K.

doi:10.1007/978-981-15-3314-3_2

Cited by 6 publications

(4 citation statements)

References 156 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typical emission of rare earths is presented. The image was drawn based on the previous works (Kenyon, 2002; Markose et al., 2020; Satpute et al., 2022; Singh et al., 2019; Sun et al., 2016; Zhong et al., 2014).…”

Section: Upconversion Nanoparticle (Ucnp) For Aflatoxin Detectionmentioning

confidence: 99%

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

Bahari,

Mousavi Khaneghah,

Eş

2024

Comp Rev Food Sci Food Safe

View full text Add to dashboard Cite

Mycotoxins, highly toxic and carcinogenic secondary metabolites produced by certain fungi, pose significant health risks as they contaminate food and feed products globally. Current mycotoxin detection methods have limitations in real‐time detection capabilities. Aptasensors, incorporating aptamers as specific recognition elements, are crucial for mycotoxin detection due to their remarkable sensitivity and selectivity in identifying target mycotoxins. The sensitivity of aptasensors can be improved by using upconversion nanoparticles (UCNPs). UCNPs consist of lanthanide ions in ceramic host, and their ladder‐like energy levels at f‐orbitals have unique photophysical properties, including converting low‐energy photons to high‐energy emissions by a series of complex processes and offering sharp, low‐noise, and sensitive near‐infrared to visible detection strategy to enhance the efficacy of aptasensors for novel mycotoxin detection. This article aims to review recent reports on the scope of the potential of UCNPs in mycotoxin detection, focusing on their integration with aptasensors to give readers clear insight. We briefly describe the upconversion photoluminescence (UCPL) mechanism and relevant energy transfer processes influencing UCNP design and optimization. Furthermore, recent studies and advancements in UCNP‐based aptasensors will be reviewed. We then discuss the potential impact of UCNP‐modified aptasensors on food safety and present an outlook on future directions and challenges in this field. This review article comprehensively explains the current state‐of‐the‐art UCNP‐based aptasensors for mycotoxin detection. It provides insights into potential applications by addressing technical and practical challenges for practical implementation.

show abstract

Section: Upconversion Nanoparticle (Ucnp) For Aflatoxin Detectionmentioning

confidence: 99%

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

Bahari,

Mousavi Khaneghah,

Eş

2024

Comp Rev Food Sci Food Safe

View full text Add to dashboard Cite

show abstract

“…Furthermore, a technique to produce core-shell MIP nanoparticles is core-shell grafting followed by polymerization ( Figure 7 ) [ 103 ]. Preformed particles that compose the core, such as organic polymers [ 114 ], silica [ 115 ], superparamagnetic iron oxides [ 116 ], quantum dots [ 117 ], upconversion nanophosphors [ 118 ], carbon dots [ 119 ], and gold/silver particles [ 120 ], are linked to MIPs, which represent the shell of the nanoparticles. This technique allows fine control over MIP size [ 121 ].…”

Section: Molecularly Imprinted Polymers (Mips)mentioning

confidence: 99%

The Evolution of Molecular Recognition: From Antibodies to Molecularly Imprinted Polymers (MIPs) as Artificial Counterpart

Parisi

Francomano

Dattilo

et al. 2022

JFB

View full text Add to dashboard Cite

Molecular recognition is a useful property shared by various molecules, such as antibodies, aptamers and molecularly imprinted polymers (MIPs). It allows these molecules to be potentially involved in many applications including biological and pharmaceutical research, diagnostics, theranostics, therapy and drug delivery. Antibodies, naturally produced by plasma cells, have been exploited for this purpose, but they present noticeable drawbacks, above all production cost and time. Therefore, several research studies for similar applications have been carried out about MIPs and the main studies are reported in this review. MIPs, indeed, are more versatile and cost-effective than conventional antibodies, but the lack of toxicity studies and their scarce use for practical applications, make it that further investigations on this kind of molecules need to be conducted.

show abstract

“…14 Choice of the host material is crucial due to its impact on the upconversion ability, emission intensity, and wavelength of emitted light. 5,11,12,15 To achieve efficient luminescence, the host should be a low phonon material, which decreases the rate of non-radiative relaxation, with a good distribution of a high amount of activator ions to avoid cross-relaxation mechanisms. Usually, for inorganic upconversion materials fluorides (NaYF 4 ), oxides (ZrO 2 , Y 2 O 3 , SiO 2 , TiO 2 ), oxyhalides (GdOCl), oxysulfides (La 2 O 2 S), and phosphates (LuPO 4 , YPO 4 ) are used as hosts.…”

Section: Introductionmentioning

confidence: 99%

“…A typical upconversion material consists of emitting ions (activator), and optionally enhancing ions (sensitizer), embedded in a matrix (host). 8,11,12 Er 3+ ions are one of the extensively studied activator ions for upconversion from near-infrared (NIR) to visible (VIS), red and green, and ultraviolet (UV) regions (390–410 nm), which is due to an appropriate energy level structure. 11 To enhance the absorption of infrared photons an Yb 3+ sensitizer is added, due to its large absorption cross-section in NIR compared to other Ln 3+ ions (9.11 × 10 −21 cm −2 at 980 nm excitation).…”

Section: Introductionmentioning

confidence: 99%

Near-infrared to visible and ultraviolet upconversion in TiO₂ thin films modified with Er and Yb

et al. 2023

View full text Add to dashboard Cite

show abstract

Upconversion Nanophosphors: An Overview

Cited by 6 publications

References 156 publications

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

The Evolution of Molecular Recognition: From Antibodies to Molecularly Imprinted Polymers (MIPs) as Artificial Counterpart

Near-infrared to visible and ultraviolet upconversion in TiO₂ thin films modified with Er and Yb

Contact Info

Product

Resources

About

Upconversion Nanophosphors: An Overview

Cited by 6 publications

References 156 publications

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

Upconversion nanoparticles‐modified aptasensors for highly sensitive mycotoxin detection for food quality and safety

The Evolution of Molecular Recognition: From Antibodies to Molecularly Imprinted Polymers (MIPs) as Artificial Counterpart

Near-infrared to visible and ultraviolet upconversion in TiO2 thin films modified with Er and Yb

Contact Info

Product

Resources

About

Near-infrared to visible and ultraviolet upconversion in TiO₂ thin films modified with Er and Yb