TY - JOUR
T1 - Decrease in thermal conductivity in polymeric P3HT nanowires by size-reduction induced by crystal orientation
T2 - New approaches towards thermal transport engineering of organic materials
AU - Rojo, Miguel Muñoz
AU - Martín, Jaime
AU - Grauby, Stéphane
AU - Borca-Tasciuc, Theodorian
AU - Dilhaire, Stefan
AU - Martin-Gonzalez, Marisol
PY - 2014/7/21
Y1 - 2014/7/21
N2 - To date, there is no experimental characterization of thermal conductivity of semiconductor polymeric individual nanowires embedded in a matrix. This work reports on scanning thermal microscopy measurements in a 3ω configuration to determine how the thermal conductivity of individual nanowires made of a model conjugated polymer (P3HT) is modified when decreasing their diameters. We observe a reduction of thermal conductivity, from λNW = 2.29 ± 0.15 W K-1 m-1 to λNW = 0.5 ± 0.24 W K-1 m-1, when the diameter of nanowires is reduced from 350 nm to 120 nm, which correlates with the polymer crystal orientation measured by WAXS. Through this work, the foundations for future polymer thermal transport engineering are presented.
AB - To date, there is no experimental characterization of thermal conductivity of semiconductor polymeric individual nanowires embedded in a matrix. This work reports on scanning thermal microscopy measurements in a 3ω configuration to determine how the thermal conductivity of individual nanowires made of a model conjugated polymer (P3HT) is modified when decreasing their diameters. We observe a reduction of thermal conductivity, from λNW = 2.29 ± 0.15 W K-1 m-1 to λNW = 0.5 ± 0.24 W K-1 m-1, when the diameter of nanowires is reduced from 350 nm to 120 nm, which correlates with the polymer crystal orientation measured by WAXS. Through this work, the foundations for future polymer thermal transport engineering are presented.
UR - http://www.scopus.com/inward/record.url?scp=84903649488&partnerID=8YFLogxK
U2 - 10.1039/c4nr00107a
DO - 10.1039/c4nr00107a
M3 - Article
AN - SCOPUS:84903649488
VL - 6
SP - 7858
EP - 7865
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 14
ER -