Fin-like CdSeS Nanoplatelets for Pesticide Sensing

Gao, Fan; Yang, Lanlan; Tang, Jianguo; Du, Ziyun; Wang, Yao; Hu, Zhongyi; Han, Dongni; Huang, Linjun; Belfiore, Laurence A.

doi:10.1021/acsanm.9b00398

Cited by 8 publications

(9 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CdSe NPLs with chiral ligands were discovered to be sensitive to the presence of heavy metal ions (e.g., lead), enabling the development of a sensitive in situ probe with a detection limit of 5 nM. In diverse chemical sensing applications, NPLs show overall promise …”

Section: Synthesis and Structure Of Nplsmentioning

confidence: 99%

See 1 more Smart Citation

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

Diroll

Güzeltürk

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

The field of colloidal synthesis of semiconductors emerged 40 years ago and has reached a certain level of maturity thanks to the use of nanocrystals as phosphors in commercial displays. In particular, II−VI semiconductors based on cadmium, zinc, or mercury chalcogenides can now be synthesized with tailored shapes, composition by alloying, and even as nanocrystal heterostructures. Fifteen years ago, II−VI semiconductor nanoplatelets injected new ideas into this field. Indeed, despite the emergence of other promising semiconductors such as halide perovskites or 2D transition metal dichalcogenides, colloidal II−VI semiconductor nanoplatelets remain among the narrowest room-temperature emitters that can be synthesized over a wide spectral range, and they exhibit good material stability over time. Such nanoplatelets are scientifically and technologically interesting because they exhibit optical features and production advantages at the intersection of those expected from colloidal quantum dots and epitaxial quantum wells. In organic solvents, gram-scale syntheses can produce nanoparticles with the same thicknesses and optical properties without inhomogeneous broadening. In such nanoplatelets, quantum confinement is limited to one dimension, defined at the atomic scale, which allows them to be treated as quantum wells. In this review, we discuss the synthetic developments, spectroscopic properties, and applications of such nanoplatelets. Covering growth mechanisms, we explain how a thorough understanding of nanoplatelet growth has enabled the development of nanoplatelets and heterostructured nanoplatelets with multiple emission colors, spatially localized excitations, narrow emission, and high quantum yields over a wide spectral range. Moreover, nanoplatelets, with their large lateral extension and their thin short axis and low dielectric surroundings, can support one or several electron−hole pairs with large exciton binding energies. Thus, we also discuss how the relaxation processes and lifetime of the carriers and excitons are modified in nanoplatelets compared to both spherical quantum dots and epitaxial quantum wells. Finally, we explore how nanoplatelets, with their strong and narrow emission, can be considered as ideal candidates for pure-color light emitting diodes (LEDs), strong gain media for lasers, or for use in luminescent light concentrators.

show abstract

Section: Synthesis and Structure Of Nplsmentioning

confidence: 99%

“…In diverse chemical sensing applications, NPLs show overall promise. 570 In addition, Olutas et al discovered that the Forster energy transfer efficiency between blue-emitting QDs and green-emitting 4 ML CdSe NPLs follows an excellent linear trend. 445 The PL lifetimes of NPLs and QDs have reflected this change.…”

Section: Other Applicationsmentioning

confidence: 99%

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

Diroll

Güzeltürk

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

show abstract

“…STEm–EDX was used; also TEM measurements were obtained. The FNPL systems were prepared by a previously known method [ 151 ].…”

Section: Solar Conversions Related To Probingmentioning

confidence: 99%

Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge

et al. 2021

View full text Add to dashboard Cite

In this review from literature appearing over about the past 5 years, we focus on selected selenide reports and related chemistry; we aimed for a digestible, relevant, review intended to be usefully interconnected within the realm of fluorescence and selenium chemistry. Tellurium is mentioned where relevant. Topics include selenium in physics and surfaces, nanoscience, sensing and fluorescence, quantum dots and nanoparticles, Au and oxide nanoparticles quantum dot based, coatings and catalyst poisons, thin film, and aspects of solar energy conversion. Chemosensing is covered, whether small molecule or nanoparticle based, relating to metal ion analytes, H2S, as well as analyte sulfane (biothiols—including glutathione). We cover recent reports of probing and fluorescence when they deal with redox biology aspects. Selenium in therapeutics, medicinal chemistry and skeleton cores is covered. Selenium serves as a constituent for some small molecule sensors and probes. Typically, the selenium is part of the reactive, or active site of the probe; in other cases, it is featured as the analyte, either as a reduced or oxidized form of selenium. Free radicals and ROS are also mentioned; aggregation strategies are treated in some places. Also, the relationship between reduced selenium and oxidized selenium is developed.

show abstract

“…Here, the main challenge of NPLs is to maintain their 2D morphology with atomic-level thickness. One of the effective approaches to achieve further tuning of optical properties is homogeneous alloying of NPLs without varying vertical thickness. − The benefit of alloy NPLs is that their optoelectronic properties can be predicted in advance with delicate controlling of the amount of added precursors. Sadan et al have synthesized CdS x Se 1– x alloy NPLs by tuning the reactivity of S and Se precursors toward Cd sites .…”

Section: Introductionmentioning

confidence: 99%

Hole Transfer Dynamics of 2D CdSeS Alloy Nanoplatelets for Photon-to-Current Conversion

et al. 2022

View full text Add to dashboard Cite

Colloidal two-dimensional (2D) CdSe nanoplatelets (NPLs) with strong quantum confinement in the vertical direction are being explored extensively, because of their potential optoelectronic and photonic applications. Here, we have synthesized CdSeS alloy NPLs by incorporating S atoms in the CdSe NPLs to tune their optical properties and investigated the charge transfer dynamics of alloy NPLs by preparing a hybrid with a 4-amino thiophenol (ATP) molecule. Hole transfer from alloy NPLs to the ATP molecule is evident from femtosecond transient absorption (TA) spectroscopy study in a time scale of 3.1 ps. Efficient charge separation from alloy NPLs to ATP molecules is beneficial for photon-to-current conversion and optoelectronic applications. Photodetector devices based on hybrid alloy NPLs exhibit high photocurrent, fast response (∼114 ms), and high detectivity of 2.5 × 10 10 Jones.

show abstract

Fin-like CdSeS Nanoplatelets for Pesticide Sensing

Cited by 8 publications

References 27 publications

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

2D II–VI Semiconductor Nanoplatelets: From Material Synthesis to Optoelectronic Integration

Discussions of Fluorescence in Selenium Chemistry: Recently Reported Probes, Particles, and a Clearer Biological Knowledge

Hole Transfer Dynamics of 2D CdSeS Alloy Nanoplatelets for Photon-to-Current Conversion

Contact Info

Product

Resources

About