TY  - JOUR
AU  - Papp, Paszkál
AU  - Bourg, Samantha
AU  - Emmanuel, Michael
AU  - Tóth, Ágota
AU  - Abou-Hassan, Ali
AU  - Horváth, Dezső
TI  - Spatiotemporal Distribution of Calcium Oxalate Crystals in a Microchannel
JF  - CRYSTAL GROWTH & DESIGN
J2  - CRYST GROWTH DES
VL  - 23
PY  - 2023
IS  - 11
SP  - 8116
EP  - 8123
PG  - 8
SN  - 1528-7483
DO  - 10.1021/acs.cgd.3c00839
UR  - https://m2.mtmt.hu/api/publication/34276733
ID  - 34276733
AB  - The formation of crystals under physicochemical and flow dynamic conditions in constrained dimensions is ubiquitous in nature and of great interest to different disciplines in science. In this report, using a physicochemical approach, we investigated the spatiotemporal precipitation of calcium oxalate (CaOx) crystals, the most common chemical compound found in kidney stones, at the dynamic interface generated by the interdiffusion of oxalate and calcium ions in a microchannel. Spatiotemporal crystal habit distributions were mapped and analyzed using scanning electron microscopy, and their formation was correlated to a numerical model that accounts for supersaturation and gravity. We show that while monohydrated CaOx crystals are the most frequent with random distribution in the channel, the dihydrated CaOx phase crystals are mainly formed at the contact line between oxalate and calcium at the oxalate side, where gradients are large and supersaturation is low. In addition, the size of the crystals correlates well with the supersaturation with increasing monodispersity over time. These results are supported by the numerical model. The simulations also show that nucleation can occur everywhere in the channel; however, with time, nucleation is limited to the upper level of the channel, while crystals on the bottom continue to grow from the reactants.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Emmanuel, Michael
AU  - Lantos, Emese
AU  - Horváth, Dezső
AU  - Tóth, Ágota
TI  - Formation and growth of lithium phosphate chemical gardens
JF  - SOFT MATTER
J2  - SOFT MATTER
VL  - 18
PY  - 2022
IS  - 8
SP  - 1731
EP  - 1736
PG  - 6
SN  - 1744-683X
DO  - 10.1039/d1sm01808f
UR  - https://m2.mtmt.hu/api/publication/32838795
ID  - 32838795
N1  - Funding Agency and Grant Number: National Research, Development and Innovation Office [NN125746, K138844]; University of Szeged [5648]
            Funding text: This work was supported by the National Research, Development and Innovation Office (NN125746 and K138844) and the University of Szeged Open Access Fund (5648).
AB  - We show that a chemical garden can be developed from an alkaline metal precipitate using a flow-driven setup. By injecting sodium phosphate solution into lithium chloride solution from below, a liquid jet appears, on which a precipitate grows forming a structure resembling a hydrothermal vent. The precipitate column continuously builds upward until a maximum height is reached. The vertical growth then significantly slows down while the tube diameter still increases. The analysis of the growth profiles has revealed a linear dependence of volume growth rate on the injection rate, hence yielding a universal growth profile. The expansion in diameter, localized at the tip of the structure, scales with a power law suggesting that the phenomenon is controlled by both diffusion and convection.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Emmanuel, Michael
AU  - Papp, Paszkál
AU  - Schuszter, Gábor
AU  - Imre-Deák, Ágota
AU  - Janovák, László
AU  - Tóth, Ágota
AU  - Horváth, Dezső
TI  - Nucleation kinetics of lithium phosphate precipitation
JF  - CRYSTENGCOMM
J2  - CRYSTENGCOMM
VL  - 24
PY  - 2022
SP  - 4447
EP  - 4453
PG  - 7
SN  - 1466-8033
DO  - 10.1039/D2CE00333C
UR  - https://m2.mtmt.hu/api/publication/32875531
ID  - 32875531
LA  - English
DB  - MTMT
ER  - 

TY  - THES
AU  - Emmanuel, Michael
TI  - Nucleation kinetics and flow-driven crystallization of lithium phosphate
PB  - Szegedi Tudományegyetem
PY  - 2022
SP  - 102
DO  - 10.14232/phd.11352
UR  - https://m2.mtmt.hu/api/publication/33131143
ID  - 33131143
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Emmanuel, Michael
AU  - Horváth, Dezső
AU  - Tóth, Ágota
TI  - Flow-driven crystal growth of lithium phosphate in microchannels
JF  - CRYSTENGCOMM
J2  - CRYSTENGCOMM
VL  - 22
PY  - 2020
IS  - 29
SP  - 4887
EP  - 4893
PG  - 7
SN  - 1466-8033
DO  - 10.1039/d0ce00540a
UR  - https://m2.mtmt.hu/api/publication/31434953
ID  - 31434953
LA  - English
DB  - MTMT
ER  -