Cation exchange (CE) has emerged as a premier postsynthetic method to carefully tune the chemical composition and properties of nanocrystals with excellent morphology retention. However, reaction conditions are typically dictated by the ubiquitous ligands bound to their surface, limiting their solubility and influencing the thermodynamics/kinetics of the reaction. To bypass these challenges, we report on CE reactions with Cu+, Ag+, Cu2+, Cd2+, Zn2+, and Mn2+ utilizing ligand-free CdS and CuxSey thin films as host templates. The exchange reactions could be performed sequentially or simultaneously (i.e., two guest cations) to access compositionally diverse products. The incorporation of cations on the host films was confirmed using SEM-EDS, XPS, and ICP-MS analyses, as well as tracking wavelength shifts in the UV–vis absorption spectra. The flexibility of this approach was demonstrated as reactions were carried out using an array of different guest precursor salts and solvents with a range of polarities. Moreover, the reactions were generalizable among selenide and sulfide films and proceeded under milder conditions in comparison with reported nanocrystal reactions. A ligand-free environment with flexible reaction conditions, as the work herein, could aid in deconvoluting the different factors involved in CE reactions and further expand its use for fundamental research and applications like photovoltaics, optoelectronics, and catalysis.

Hannah R. Lacey

Kevin D. Dobson

Emil A. Hernández- Pagán

ACS Nanoscience Au

ACS Nanoscience Au是一本开放获取期刊，发表化学、生物学、医学、材料科学、物理学和工程学的交叉领域内纳米科学和纳米技术研究的原创、基础和应用研究。ACS Nanoscience Au也出版应用性质的原创实验和理论研究，将材料、工程、物理、生物科学和化学领域的知识整合到纳米材料的重要应用中。

期刊收录研究方向：
纳米结构、纳米材料和纳米级器件的合成、组装、表征、理论、建模和模拟
有机、无机、聚合物、杂化和生物纳米结构的设计、制造和应用
纳米级化学、物理和生物现象的实验和理论研究
纳米科学和纳米技术的方法和工具
自组装和定向组装
零维、一维和二维材料
具有先进性能的纳米结构和纳米工程器件
纳米生物技术
纳米医学和纳米毒理学
ACS Nanoscience Au is an open access journal that publishes original, fundamental, and applied research on nanoscience and nanotechnology research at the interfaces of chemistry, biology, medicine, materials science, physics, and engineering.

The journal publishes short letters, comprehensive articles, reviews, and perspectives on all aspects of nanoscience and nanotechnology:

synthesis, assembly, characterization, theory, modeling, and simulation of nanostructures, nanomaterials, and nanoscale devices
design, fabrication, and applications of organic, inorganic, polymer, hybrid, and biological nanostructures
experimental and theoretical studies of nanoscale chemical, physical, and biological phenomena
methods and tools for nanoscience and nanotechnology
self- and directed-assembly
zero-, one-, and two-dimensional materials
nanostructures and nano-engineered devices with advanced performance
nanobiotechnology
nanomedicine and nanotoxicology
ACS Nanoscience Au also publishes original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.

ACS Nanoscience Au is an open access journal that focuses on research in nanoscience and nanotechnology at the interfaces of chemistry, biology, medicine, materials science, physics, and engineering. The journal publishes original fundamental and applied research, covering important applications of nanomaterials, as well as related experimental and theoretical studies.\n\nResearch areas include: \n- Synthesis, assembly, characterization, theory, modeling, and simulation of nanostructures, nanomaterials, and nanoscale devices\n- Design, fabrication, and applications of organic, inorganic, polymer, hybrid, and biological nanostructures\n- Experimental and theoretical studies of nanoscale chemical, physical, and biological phenomena\n- Methods and tools for nanoscience and nanotechnology\n- Self- and directed-assembly\n- Zero-, one-, and two-dimensional materials\n- Nanostructures and nano-engineered devices with advanced performance\n- Nanobiotechnology\n- Nanomedicine and nanotoxicology.

《ACS Nanoscience Au》是一本开放获取期刊，专注于化学、生物学、医学、材料科学、物理学和工程学等交叉领域的纳米科学和纳米技术研究。期刊发表原创的基础和应用研究，涵盖纳米材料的重要应用，以及相关的实验和理论研究。\n\n期刊的研究方向包括：\n- 纳米结构、纳米材料和纳米级器件的合成、组装、表征、理论、建模和模拟\n- 有机、无机、聚合物、杂化和生物纳米结构的设计、制造和应用\n- 纳米级化学、物理和生物现象的实验和理论研究\n- 纳米科学和纳米技术的方法和工具\n- 自组装和定向组装\n- 零维、一维和二维材料\n- 具有先进性能的纳米结构和纳米工程器件\n- 纳米生物技术\n- 纳米医学和纳米毒理学

Flexible Cation Exchange Environment via Ligand-Free Metal Chalcogenide Thin Films

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	2