TY - JOUR
T1 - Thermal characterization of solutions containing gold nanoparticles at different pH values
AU - Jiménez-Pérez, J. L.
AU - Sánchez-Ramírez, J. F.
AU - Correa-Pacheco, Z. N.
AU - Cruz-Orea, A.
AU - Anota, E. Chigo
AU - Sánchez-Sinencio, F.
N1 - Funding Information:
Acknowledgments We thank Conacyt, ICyTDF, COFAA, CLAF, and SIP-IPN, México for their partial financial support. One of the authors (A. Cruz-Orea) is grateful for partial financial support from CONACYT Project No. 103632.
PY - 2013/5
Y1 - 2013/5
N2 - The thermal lens spectrometry (TLS) technique was used to obtain the thermal diffusivity of solutions containing gold nanoparticles (15 nm average diameter) at different pH values. TLS, in a mode-mismatched dual beam configuration, provides a reliable alternative to measure, with high sensitivity, the thermal diffusivities of semitransparent materials, and low thermal diffusivities. The results show that the nanofluid thermal diffusivity increases when the pH is increased. These results will be compared with reported studies for nanofluids with variable pH. From this comparison, it can be seen that the pH values of the solutions influenced the superficial density of charges in the nanoparticles. Also, optical absorption spectra for these gold nanoparticle solutions were obtained using a spectrophotometer, and the nanoparticle size was obtained by the TEM technique. The present measurements were performed at room temperature. This study is important for some medical applications such as photothermal cancer therapy.
AB - The thermal lens spectrometry (TLS) technique was used to obtain the thermal diffusivity of solutions containing gold nanoparticles (15 nm average diameter) at different pH values. TLS, in a mode-mismatched dual beam configuration, provides a reliable alternative to measure, with high sensitivity, the thermal diffusivities of semitransparent materials, and low thermal diffusivities. The results show that the nanofluid thermal diffusivity increases when the pH is increased. These results will be compared with reported studies for nanofluids with variable pH. From this comparison, it can be seen that the pH values of the solutions influenced the superficial density of charges in the nanoparticles. Also, optical absorption spectra for these gold nanoparticle solutions were obtained using a spectrophotometer, and the nanoparticle size was obtained by the TEM technique. The present measurements were performed at room temperature. This study is important for some medical applications such as photothermal cancer therapy.
KW - Gold nanoparticles
KW - Nanofluids
KW - Photothermal techniques
KW - Thermal lens spectrometry
UR - http://www.scopus.com/inward/record.url?scp=84879796451&partnerID=8YFLogxK
U2 - 10.1007/s10765-012-1372-0
DO - 10.1007/s10765-012-1372-0
M3 - Artículo
SN - 0195-928X
VL - 34
SP - 955
EP - 961
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
IS - 5
ER -