@article {45357,
	title = { Ligand-solvent compatibility: the unsung hero in the digestive ripening story},
	journal = {Langmuir },
	volume = {34},
	year = {2018},
	month = {NOV},
	pages = {13680-13689},
	type = {Article},
	abstract = {<p>Digestive ripening (DR) is a process where a polydisperse nanocrystal (NC) system is converted into a monodisperse one with the aid of thermal heating of NCs in the presence of an excess surface-active organic ligand called digestive ripening agent (DRA) and a solvent. Here, we demonstrate that the solvent-DRA compatibility influences the final size and size distribution of the NCs in a significant manner. Accordingly, in this study, using the DR of gold NCs as the test case with alkanethiol (decanethiol/C10HT) and fluorinated thiol (1H,1H,2H,2H-perfluorodecanethiol/C10FT) as DRA{\textquoteright}s and toluene and alpha,alpha,alpha-trifluoro-toluene (TFT) and their combination as solvents, we clearly establish that alkanethiols result in best-quality NCs after DR in toluene while the fluorinated thiols provide reasonably monodispersed NCs in TFT. Our results also ascertain that even when DR is carried out in a mixture of solvents, as long as the compatible solvent is the major component, the DR process results in reasonably monodisperse NCs. As soon as the amount of uncompatible solvent exceeds a threshold limit, there is perceptible increase in the polydispersity of the NCs. We conclude that the polarity of the solvent, which affects the buildup of ligated atoms/clusters, plays a key role in controlling the size distributions of the NCs.</p>},
	issn = { 0743-7463},
	doi = {10.1021/acs.langmuir.8b02699},
	author = {Shimpi, Jayesh R. and Chaudhari, Vijay Raman and Prasad, Bhagavatula L. V.}
}
@article {48350,
	title = {Ligands as {\textquoteleft}{\textquoteleft}Matchmakers{\textquoteright}{\textquoteright}: alloying from a physical mixture of metal nanoparticle dispersions by digestive ripening},
	journal = {Langmuir},
	volume = {38},
	year = {2022},
	month = {DEC },
	pages = {15917-15924},
	type = {Article},
	abstract = {<p>
	Digestive ripening (DR) of a physical mixture of different metal nanoparticles (NPs) in the presence of a suitable ligand is demonstrated to be a convenient way to obtain alloy NPs. The results show that the right choice of metal-ligand combination is extremely important for efficient alloying. The results are rationalized on the basis of hard soft acid base principles, and it is concluded that better alloying ensues if DR is carried out with soft ligands when soft metals are being used and hard ligands facilitate alloying between hard metals. On the other hand, when a physical mixture of hard-soft metals is taken, ligands with intermediate character work better. The results presented here could prove to be extremely valuable and open new avenues of making interesting alloy/intermetallic systems.</p>
},
	issn = {0743-7463},
	doi = {10.1021/acs.langmuir.2c01884},
	author = {Shimpi, Jayesh R. and Prasad, V. Bhagavatula L.}
}
