☆ 4.8 Article

Reversible Z-Type to L-Type Ligand Exchange on Zinc-Blende Cadmium Selenide Nanoplatelets

CHEMISTRY OF MATERIALS (2020)

Journal

CHEMISTRY OF MATERIALS

Volume 32, Issue 13, Pages 5814-5826

Publisher

AMER CHEMICAL SOC

DOI: 10.1021/acs.chemmater.0c01712

Keywords

-

Categories

Chemistry, Physical Materials Science, Multidisciplinary

Funding

National Science Foundation [CHE-1607862]
Washington University
Institute of Materials Science and Engineering

Ask authors/readers for more resources

Protocol

Community support

Reagent

Community support

Abstract

Three-monolayer CdSe nanoplatelets having the composition (CdSe)(3)[Cd(OAc)(0.77)(oleate)(1.23)](0.78), large lateral dimensions, minimal strain distortions, and the zinc-blende crystal structure undergo Z-type to L-type ligand exchange with ethylenediamine, affording NPLs of composition (CdSe)(3)[en](0.67) (en = ethylenediamine). The L-type ligation of the (CdSe)(3)[en](0.67) (en = ethylenediamine) NPLs is exchanged for Z-type ligation with Cd(oleate)(2), Cd(OAc)(2), CdCl2, Zn(oleate)(2), and ZnCl2, giving NPLs having near to the ideal compositions of (CdSe)(3)[MX2]. All of the Z-type to L-type and L-type to Z-type ligand exchanges are kinetically slow, requiring several hours to reach completion, suggesting that a considerable surface reconstruction is required. In contrast, three-monolayer NPLs having a significant rolling distortion and four- and five-monolayer NPLs having small lateral dimensions are unstable to ethylenediamine, and Z-type to L-type ligand exchange is not achieved.

Authors

I am an author on this paper

Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8

Not enough ratings

Secondary Ratings

Novelty

-

Significance

-

Scientific rigor

-

Rate this paper

Recommended

Article Chemistry, Multidisciplinary

Covalent inorganic complexes enabled zinc blende to wurtzite phase changes in CdSe nanoplatelets

Xinke Kong, Lin Ru, Junjun Ge, Yalei Deng, Pan-Ke Zhang, Yuanyuan Wang

Summary: Researchers observed and monitored a ligand-assisted phase transition process from zinc blende to wurtzite in CdSe nanoplatelets. They proposed a new crystal transformation pathway and elucidated a general phase-transition mechanism, which facilitates precise functional nanomaterial design.

CHEMICAL SCIENCE (2023)

Add to Collection

Article Chemistry, Physical

Halometallates Bind as Z-Type Ligands on Wurtzite CdSe Nanoplatelets

William E. Buhro, Chenguang Ji

Summary: Two-phase ligand exchange can convert the amine-ligated nanoplatelets to NMF-ligated ones, and further ligand exchange can lead to halometallate-ligated CdSe nanoplatelets. Analysis of the absorption spectra and X-ray diffraction data confirms the intact, Z-type binding of the halometallates.

CHEMISTRY OF MATERIALS (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Spectroelectrochemistry of CdSe/CdXZn1-XS Nanoplatelets

Arun Ashokan, Jiho Han, James A. Hutchison, Paul Mulvaney

Summary: We report an unexpected enhancement of photoluminescence (PL) in CdSe-based core/shell nanoplatelets (NPLs) upon electrochemical hole injection. Moderate hole doping densities induce an enhancement of more than 50% in PL intensity, accompanied by a narrowing and blue-shift of the PL spectrum. The hole-induced PL brightening in NPLs contrasts with the typical observation of PL quenching in CdSe-based quantum dots following hole injection. We propose that hole injection removes surface traps responsible for negative trions formation, thereby blocking nonradiative Auger processes. Continuous photoexcitation causes the enhanced PL intensity to decrease back to its initial level, indicating that photocharging is a key step in the loss of PL luminescence during normal aging. Modulation of the potential can be used for reversible enhancement or quenching of PL, enabling electro-optical switching.

ACS NANO (2023)

Add to Collection

Article Chemistry, Multidisciplinary

PbSe/PbS Core/Shell Nanoplatelets with Enhanced Stability and Photoelectric Properties

Anton A. Babaev, Ivan D. Skurlov, Sergei A. Cherevkov, Peter S. Parfenov, Mikhail A. Baranov, Natalya K. Kuzmenko, Aleksandra V. Koroleva, Evgeniy V. Zhizhin, Anatoly V. Fedorov

Summary: Lead chalcogenide nanoplatelets (NPLs) are a promising material for devices operating in the near IR and IR spectrum region. In this study, PbSe/PbS core/shell NPLs were synthesized using the cation exchange method. The shell growth improved the stability and passivated surface trap states of the NPLs. A photoconductor was fabricated using PbSe/PbS NPLs, demonstrating enhanced conductivity and responsivity with fast rise and fall times.

NANOMATERIALS (2023)

Add to Collection

Article Electrochemistry

Improved photoelectrochemical hydrogen production performance of reduced graphene oxide-cadmium zinc sulfoselenide photoelectrodes prepared by a Facile In-situ Electrosynthesis method

Ozlem Uguz Neli, Oezlem Budak, Atif Koca

Summary: Cadmium zinc sulfoselenide (CdZnSSe) and reduced graphene oxide-cadmium zinc sulfoselenide (RGO)-CdZnSSe composite-based photoelectrodes were fabricated using a facile, simultaneous co-electrodeposition method for the first time. The rCV technique allowed for homogeneous decoration of CdZnSSe particles among RGO sheets, resulting in improved photoelectrochemical performance in hydrogen evolution. The Cd0.8Zn0.2S0.2Se0.8 photodecoration demonstrated the highest photocurrent density (4.08 mA cm-2), which was further increased to 5.00 mA cm-2 by decorating with RGO. The proposed rCV technique showed superiority in fabricating well-controlled RGO-CdZnSSe composite photoelectrodes.

ELECTROCHIMICA ACTA (2023)

Add to Collection

Article Chemistry, Multidisciplinary

Efficient Near-Infrared Light-Emitting Diodes Based on CdHgSe Nanoplatelets

Anatol Prudnikau, Hossein Roshan, Fabian Paulus, Beatriz Martin-Garcia, Rene Huebner, Houman Bahmani Jalali, Manuela De Franco, Mirko Prato, Francesco Di Stasio, Vladimir Lesnyak

Summary: Cadmium mercury selenide (CdHgSe) nanocrystals with controlled shape and heterostructure design show improved optical properties. A colloidal synthesis method is developed to synthesize CdHgSe/ZnCdS core/shell nanoplatelets with tunable emission wavelength. These nanoplatelets exhibit low turn-on voltage and high external quantum efficiency in light-emitting diodes.

ADVANCED FUNCTIONAL MATERIALS (2023)

Add to Collection

Article Materials Science, Ceramics

Size-optical characteristics of CdSe/ZnS quantum dots modified by thiol stabilizers

Alisher Farmonovih Ishankulov, Kadriddin Fakhriddinovich Khalilov, Radik Rashidovich Shamilov, Yuriy Genadievich Galyametdinov, Nurali Kurbonaliyevich Mukhamadiev

Summary: CdSe quantum dots stabilized with oleic acid were synthesized by the colloidal method. By growing a ZnS shell onto the CdSe nanoparticles, CdSe/ZnS core-shell hybrids were obtained with increased luminescence yield. Ligand exchange reactions were carried out, replacing the stabilizer with thiol molecules, leading to a change in the optical properties and a decrease in luminescence intensity.

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY (2023)

Add to Collection

Article Materials Science, Multidisciplinary

Facile synthesis of Cd1-xZnxSe1-ySy/CdSe/Cd1-xZnxSe1-ySy nanoplatelets with precisely controlled emission wavelength

Minjae Park, Myunghwan Byun, Jaehan Jung

Summary: A facile method of synthesizing Cd1-xZnxSe1-ySy shell with graded chemical composition gradient on CdSe core nanoplatelets was introduced. The effect of precursor solubility on the morphology and photophysical properties of nanoplatelets was investigated.

THIN SOLID FILMS (2022)

Add to Collection

Article Materials Science, Ceramics

Microwave-assisted hydrothermal synthesis of type II ZnSe/ZnO heterostructures as photocatalysts for wastewater treatment

M. Arellano-Cortaza, E. Ramirez-Morales, S. J. Castillo, L. Lartundo-Rojas, I. Zamudio-Torres, E. M. Lopez Alejandro, L. Rojas-Blanco

Summary: ZnSe/ZnO heterostructures were synthesized using the microwave-assisted hydrothermal method with zinc acetate and zinc nitrate as the source of Zn2+ ions. The incorporation of ZnSe into the ZnO matrix resulted in changes in the size of ZnO crystallites and lattice parameters. Optical and texture analyses showed that ZnSe particles caused a decrease in gap energy and a significant increase in the specific surface area of ZnSe/ZnO heterostructures. ZnSe/ZnO heterostructures synthesized with zinc acetate exhibited better photocatalytic performance in visible light compared to pure ZnO.

CERAMICS INTERNATIONAL (2023)

Add to Collection

Article Chemistry, Inorganic & Nuclear

Synthesis and electrochemical investigation of Z-type barium hexaferrite nanoplatelets

M. Suganya, J. Kishor Kumar, S. Anand, K. Mohamed Racik, S. Muthupandi, S. Muniyappan, S. Nandhini

Summary: This work presents the supercapacitor performance of Z-type barium hexaferrite nanoplatelets prepared by citrate-nitrate auto combustion method. The study confirms the excellent magnetic and electrochemical properties of these nanoplatelets, suggesting their potential use in energy storage devices.

INORGANIC CHEMISTRY COMMUNICATIONS (2022)

Add to Collection

Article Chemistry, Physical

Two-Dimensional CdSe-PbSe Heterostructures and PbSe Nanoplatelets: Formation, Atomic Structure, and Optical Properties

Bastiaan B. Salzmann, Jur de Wit, Chen Li, Daniel Arenas-Esteban, Sara Bals, Andries Meijerink, Daniel Vanmaekelbergh

Summary: This study prepared two-dimensional CdSe-PbSe heterostructures and PbSe NPLs through Pb2+-for-Cd2+ cation exchange and characterized the intermediary NCs with advanced microscopy and spectroscopy techniques. The growth of PbSe domains in CdSe NPLs occurs through the replacement of zinc blende CdSe lattice with rock salt PbSe phase while preserving the anion sublattice. Temperature-dependent emission measurements reveal size-dependent change of band gap energy and the influence of the anisotropic shape.

JOURNAL OF PHYSICAL CHEMISTRY C (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Rapid In Situ Ligand-Exchange Process Used to Prepare 3D PbSe Nanocrystal Superlattice Infrared Photodetectors

Xiaojie Xu, Kyoung E. Kweon, Sean Keuleyan, April Sawvel, En Ju Cho, Christine Orme

Summary: A novel one-step in situ ligand-exchange method is demonstrated for rapid ligand exchange of nanocrystal films, retaining long-range ordering.

SMALL (2021)

Add to Collection

Article Chemistry, Multidisciplinary

Triethyl-Borates as Surfactants to Stabilize Semiconductor Nanoplatelets in Polar Solvents and to Tune Their Optical Properties

Yalei Deng, Xufeng Chen, Jing Liang, Yuanyuan Wang

Summary: This study demonstrates the successful transformation of hydrophobic zinc-blend structure nanoplatelets (Zb-NPLs) into hydrophilic ones by replacing the original ligand with triethylborate (TEB). The TEB-passivated NPLs show a significant fluorescence shift in polar solvents and maintain their original brightness. Moreover, the discovery of a new surface chemistry using borate-related ligands expands the potential application areas of NPLs.

FRONTIERS IN CHEMISTRY (2022)

Add to Collection

Article Chemistry, Multidisciplinary

Proton Shuttle-Assisted Surface Reconstruction toward Nonpolar Facets-Terminated Zinc-Blende CdSe/CdS Core/Shell Quantum Dots

Xiaolan Zhou, Chaodan Pu

Summary: Surface reconstruction is used to synthesize nonpolar facets CdSe/CdS core/shell quantum dots with a dodecahedral zinc-blende structure. The successful surface reconstruction is found to be assisted by a proton shuttle.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Add to Collection

Article Chemistry, Physical

Enhanced photoelectrochemical water splitting using zinc selenide/graphitic carbon nitride type-II heterojunction interface

Effat Sitara, Habib Nasir, Asad Mumtaz, Muhammad Fahad Ehsan, Manzar Sohail, Sadia Iram, Syeda Aqsa Batool Bukhari, Sharif Ullah, Tehmina Akhtar, Azhar Iqbal

Summary: The study successfully constructed ZnSe/gC3N4 heterojunction interface for photoelectrochemical water splitting for hydrogen generation, showing higher photocurrent density and lesser electron-hole recombination. Spectroscopy and electrochemical analysis confirmed its effectiveness.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Add to Collection

Article Chemistry, Physical

Thiol Versus Thiolate Ligation on Cadmium Selenide Quantum Belts

Yuewei Yao, William E. Buhro

CHEMISTRY OF MATERIALS (2020)

Add to Collection

Article Chemistry, Physical

Methods for the ICP-OES Analysis of Semiconductor Materials

Calynn Morrison, Haochen Sun, Yuewei Yao, Richard A. Loomis, William E. Buhro

CHEMISTRY OF MATERIALS (2020)

Add to Collection

Article Chemistry, Physical

Two-Phase Ligand Exchanges on CdSe Nanoplatelets

Chenguang Ji, William E. Buhro

CHEMISTRY OF MATERIALS (2020)

Add to Collection

Article Chemistry, Physical

Excitation Energy Dependence of Photoluminescence Quantum Yields in Semiconductor Nanomaterials with Varying Dimensionalities

William M. Sanderson, Jessica Hoy, Calynn Morrison, Fudong Wang, Yuanyuan Wang, Paul J. Morrison, William E. Buhro, Richard A. Loomis

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2020)

Add to Collection

Article Chemistry, Physical

Intraband Relaxation Dynamics of Charge Carriers within CdTe Quantum Wires

William M. Sanderson, Fudong Wang, Joshua Schrier, William E. Buhro, Richard A. Loomis

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2020)

Add to Collection

Article Chemistry, Physical

Reactivity of Magic-Size Nanoclusters (CdSe)13 and (CdTe)13 with Acids: Rapid, Low-Temperature Formation of Flat Colloidal Nanocrystals

Yang Zhou, Fudong Wang, William E. Buhro

CHEMISTRY OF MATERIALS (2020)

Add to Collection

Article Chemistry, Physical

Contrasting Ligand-Exchange Behavior of Wurtzite and Zinc-Blende Cadmium Telluride Nanoplatelets

Haochen Sun, William E. Buhro

Summary: The ligand-exchange chemistries of wurtzite (WZ) and zinc-blende (ZB) CdTe nanoplatelets exhibit contrasting behaviors, which are consistent with their facet structures. WZ nanoplatelets prefer nonpolar facets and neutral ligation, while ZB nanoplatelets prefer polar, cationic facets and anionic ligation.

CHEMISTRY OF MATERIALS (2021)

Add to Collection

Article Chemistry, Physical

Radiative dynamics and delayed emission in pure and doped InP/ZnSe/ZnS quantum dots

Paul Cavanaugh, Haochen Sun, Ilan Jen-La Plante, Maria J. Bautista, Christian Ippen, Ruiqing Ma, Anne Myers Kelley, David F. Kelley

Summary: In this study, time-correlated single photon counting was used to investigate the radiative dynamics of InP/ZnSe/ZnS core/shell/shell quantum dots with varying amounts of excess indium. The results show that QDs with excess indium exhibit different luminescence kinetics, attributed to the transient population of indium-based hole traps in the ZnSe shell. This indicates a complex interplay between shell thickness, core/shell interfaces, and the distribution of indium-based hole traps within the QDs.

JOURNAL OF CHEMICAL PHYSICS (2021)

Add to Collection

Article Chemistry, Physical

Biexciton and trion dynamics in InP/ZnSe/ZnS quantum dots

Haochen Sun, Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Maria Bautista, Ruiqing Ma, David F. Kelley

Summary: Transient absorption and time-resolved photoluminescence spectroscopies were used to study the hole tunneling and Auger dynamics in high-quality InP/ZnSe/ZnS quantum dots. The study revealed that trapped holes can tunnel into the valence band, converting one type of biexciton to another type.

JOURNAL OF CHEMICAL PHYSICS (2022)

Add to Collection

Article Chemistry, Inorganic & Nuclear

Bound-Ion Pair X-Type Ligation of Cadmium and Zinc Dithiocarbamates on Cadmium Selenide Quantum Belts

Hailey M. Meyer, Calynn E. Morrison, Richard A. Loomis, William E. Buhro

Summary: This study successfully exchanged different metal dithiocarbamate ligands with CdSe quantum belts, and it was found that these ligands bind to the quantum belt surfaces as X-type ligands through coordination, without imparting any special electronic effects to the quantum belts.

INORGANIC CHEMISTRY (2022)

Add to Collection

Article Chemistry, Physical

Halometallates Bind as Z-Type Ligands on Wurtzite CdSe Nanoplatelets

William E. Buhro, Chenguang Ji

Summary: Two-phase ligand exchange can convert the amine-ligated nanoplatelets to NMF-ligated ones, and further ligand exchange can lead to halometallate-ligated CdSe nanoplatelets. Analysis of the absorption spectra and X-ray diffraction data confirms the intact, Z-type binding of the halometallates.

CHEMISTRY OF MATERIALS (2022)

Add to Collection

Article Chemistry, Physical

Facet-Specific Electron Transfer in Pseudo-Two-Dimensional Wurtzite Cadmium Selenide Nanocrystals

Hailey M. Meyer, Jie Chen, Richard A. Loomis, William E. Buhro

Summary: This study investigates the ligand-exchange reactions of wurtzite CdSe quantum platelets and quantum belts with methyl viologen and its derivative ligands. It is found that the photoluminescence of the quantum platelets and quantum belts is quenched after partial ligand exchange. The ligand substitution occurs mainly on the thin edges of the platelets and belts. The derivative ligands MV2+(CH2)nNH(2) are more efficient in quenching the photoluminescence compared to the parent MV2+ ion. Furthermore, electron transfer to the derivative ligands only occurs at the polar facets of the CdSe platelets and belts.

JOURNAL OF PHYSICAL CHEMISTRY C (2023)

Add to Collection

No Data Available

© Peeref 2019-2024. All rights reserved.