Nanoparticle (NP) aggregation can not only change the unique properties of NPs but also affect NP transport and membrane penetration behavior in biological systems. Coarse-grained (CG) molecular dynamics (MD) simulations were performed in this work to investigate the aggregation behavior of NPs with different properties in ionic solutions under different temperature conditions. Four types of NPs and NP aggregates were modeled to analyze the effects of NP aggregation on NP translocation across the cell membrane at different temperatures. Hydrophilic modification and surface charge modification inhibited NP aggregation, whereas stronger hydrophobicity and higher temperature resulted in a higher degree of NP aggregation and a denser structure of NP aggregates. The final aggregation percentage of hydrophobic NPs in the NaCl solution at 37 °C is 87.5%, while that of hydrophilic NPs is 0%, and the time required for hydrophobic NPs to reach 85% aggregation percentage at 42 °C is 6 ns, while it is 9.2 ns at 25 °C. The counterions in the solution weakened the effect of surface charge modification, thereby realizing good dispersity. High temperature could promote the NP membrane penetration for the same NP, while it also could enhance the NP aggregation which would increase the difficulty in NP translocation across cell membrane, especially for the hydrophobic NPs. Therefore, suitable surface modification of NPs and temperature control should be comprehensively considered in promoting NP membrane penetration in biomedical applications.
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Research-Article
Nanoparticle Aggregation in Ionic Solutions and Its Effect on Nanoparticle Translocation Across the Cell Membrane
Kai Yue,
Kai Yue
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: yuekai@ustb.edu.cn
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: yuekai@ustb.edu.cn
Search for other works by this author on:
Jue Tang,
Jue Tang
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: tj_tangjue@163.com
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: tj_tangjue@163.com
Search for other works by this author on:
Hongzheng Tan,
Hongzheng Tan
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Search for other works by this author on:
Xiaoxing Lv,
Xiaoxing Lv
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Search for other works by this author on:
Xinxin Zhang
Xinxin Zhang
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Search for other works by this author on:
Kai Yue
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: yuekai@ustb.edu.cn
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: yuekai@ustb.edu.cn
Jue Tang
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: tj_tangjue@163.com
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
e-mail: tj_tangjue@163.com
Hongzheng Tan
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Xiaoxing Lv
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Xinxin Zhang
School of Energy and
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
Environmental Engineering,
University of Science and Technology Beijing,
Beijing 10083, China
1Corresponding author.
Presented at the 5th ASME 2016 Micro/Nanoscale Heat & Mass Transfer International Conference. Paper No. MNHMT2016-6395.Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received June 9, 2016; final manuscript received March 6, 2017; published online August 23, 2017. Assoc. Editor: Chun Yang.
J. Heat Transfer. Jan 2018, 140(1): 012003 (10 pages)
Published Online: August 23, 2017
Article history
Received:
June 9, 2016
Revised:
March 6, 2017
Citation
Yue, K., Tang, J., Tan, H., Lv, X., and Zhang, X. (August 23, 2017). "Nanoparticle Aggregation in Ionic Solutions and Its Effect on Nanoparticle Translocation Across the Cell Membrane." ASME. J. Heat Transfer. January 2018; 140(1): 012003. https://doi.org/10.1115/1.4037392
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