Electrochemical Formulation Maps for Multinary Chalcogenide Nanocrystal Inks and Polymer Coatings
- 1Chemistry and Biochemistry , Loyola University Chicago, 1068 W Sheridan Rd, Chicago, IL, United States, 60660
Abstract
Polymer selection influences both the electrochemical response of colloidal inks and their conversion into solid coatings, but these two effects are often evaluated for a single inorganic composition.Here, six hot-injection-derived chalcogenide nanocrystal stocks are combined with sodium alginate, chitosan or cellulose acetate at two nominal stock-mixing ratios to construct a 36-formulation library.The resistance descriptor obtained from liquid-cell impedance shows a pairing-dependent response to composition.Changing the nanocrystal-stock:polymer-stock ratio from 30:70 to 60:40 decreases this descriptor by approximately 51% for CuBSe-chitosan, whereas it increases by approximately 44% for Cu .BSe-chitosan and 52% for AgCrSe -₁.₉₅BSe-₉₅BSe-chi ₂cellulose acetate.Current retention follows a different pattern: the same ratio change that lowers the CuBSe-chitosan resistance descriptor reduces its reported retention by 6.5 percentage points.Eight selected formulations are converted into substrate-supported coatings by sequential drop casting.Their changes in arithmetic mean surface roughness span 0.256-1.662µm, and formulation selection and show why liquid screening, coating topography and contacted-layer response must be evaluated separately.Matched composition changes and measurements before and after casting provide complementary criteria for developing solution-processed chalcogenide-polymer electrochemical layers.
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BibTeX
@misc{saliu2026electrochemical,
title = {{Electrochemical Formulation Maps for Multinary Chalcogenide Nanocrystal Inks and Polymer Coatings}},
author = {Oluwaseyi Saliu and Cain Witczak and Progna Banerjee},
howpublished = {ChemRxiv},
year = {2026},
month = oct,
doi = {10.26434/chemrxiv.15010358/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010358/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Electrochemical Formulation Maps for Multinary Chalcogenide Nanocrystal Inks and Polymer Coatings
AU - Oluwaseyi Saliu
AU - Cain Witczak
AU - Progna Banerjee
PY - 2026
DA - 2026/10/13
PB - ChemRxiv
DO - 10.26434/chemrxiv.15010358/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010358/v1
AB - Polymer selection influences both the electrochemical response of colloidal inks and their conversion into solid coatings, but these two effects are often evaluated for a single inorganic composition.Here, six hot-injection-derived chalcogenide nanocrystal stocks are combined with sodium alginate, chitosan or cellulose acetate at two nominal stock-mixing ratios to construct a 36-formulation library.The resistance descriptor obtained from liquid-cell impedance shows a pairing-dependent response to composition.Changing the nanocrystal-stock:polymer-stock ratio from 30:70 to 60:40 decreases this descriptor by approximately 51% for CuBSe-chitosan, whereas it increases by approximately 44% for Cu .BSe-chitosan and 52% for AgCrSe -₁.₉₅BSe-₉₅BSe-chi ₂cellulose acetate.Current retention follows a different pattern: the same ratio change that lowers the CuBSe-chitosan resistance descriptor reduces its reported retention by 6.5 percentage points.Eight selected formulations are converted into substrate-supported coatings by sequential drop casting.Their changes in arithmetic mean surface roughness span 0.256-1.662µm, and formulation selection and show why liquid screening, coating topography and contacted-layer response must be evaluated separately.Matched composition changes and measurements before and after casting provide complementary criteria for developing solution-processed chalcogenide-polymer electrochemical layers.
ER -