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Abstract
Raman thermometry based on surface-enhanced Raman scattering has been developed using nanopipettes in cancer cell photothermal therapy (PTT). Gold nanorods (AuNRs) are robustly epoxied on glass pipettes with a high surface coverage of ∼95% and less than 10 nm-wide nanogaps for intracellular thermometry and photothermal cancer therapy. The temperature changes could be estimated from the N≡C band shifts of 4-fluorophenyl isocyanide (FPNC)-adsorbed AuNRs on the Raman thermometry nanopipette (RTN) surfaces. An intracellular temperature change of ∼2.7 °C produced by altering the [Ca2+] in A431 cells was detected using the RTN in vitro, as checked from fura-2 acetoxymethyl ester (fura-2 AM) fluorescence images. For in vivo experiments, local temperature rises of ∼19.2 °C were observed in the mouse skin, whereas infrared camera images could not tract due to spatial resolution. In addition, a tumor growth suppression was observed in the PTT processes after an administration of the three AuNR-coated nanopipettes combined with a 671 nm laser irradiation for 5 min in 30 days. These results demonstrate not only the localized temperature sensing ability of FPNC-tagged AuNR nanopipettes in cell biology but also anti-cancer effects in photothermal cancer therapy.
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Affiliation(s)
- Dinh Nghi Ngo
- Department of Chemistry, Soongsil University, Seoul 06978, South Korea
| | | | - Gun Kim
- Laboratory of Veterinary Pharmacology, College of Veterinary Medical Science and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Min Seok Song
- Laboratory of Veterinary Pharmacology, College of Veterinary Medical Science and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Mi Ri Kim
- Laboratory of Veterinary Pharmacology, College of Veterinary Medical Science and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
| | - Jaebum Choo
- Department of Chemistry, Chung-Ang University, Seoul 06974, South Korea
| | - Sang-Woo Joo
- Department of Chemistry, Soongsil University, Seoul 06978, South Korea
| | - So Yeong Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medical Science and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, South Korea
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Bui TL, Ho NT, Ho XVTT, Ngo DN, Lim SH, Son SJ, Noh SM, Joo SW. Plasmonic nanorod array for effective photothermal therapy in hyperthermia. Chem Commun (Camb) 2021; 57:8961-8964. [PMID: 34486587 DOI: 10.1039/d1cc03047g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Optical properties of anisotropic gold nanorod arrays inside anodic aluminium oxide substrates enhance the longitudinal absorption intensities and the hyperthermia cancer cell killing at 42.1 °C under photothermal laser exposures at 671 nm.
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Affiliation(s)
- Thanh Lam Bui
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
| | - Ngoc Thanh Ho
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
| | - Xuan Vuong Thi Thanh Ho
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
| | - Dinh Nghi Ngo
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
| | - Soon Hyuk Lim
- Department of Chemistry, Gachon University, Seongnam 13120, Republic of Korea.
| | - Sang Jun Son
- Department of Chemistry, Gachon University, Seongnam 13120, Republic of Korea.
| | - Seung Man Noh
- Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology, Ulsan 681-310, Republic of Korea.
| | - Sang-Woo Joo
- Department of Information Communication, Materials, and Chemistry Convergence Technology, Soongsil University, Seoul 06978, Republic of Korea.
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Nguyen NB, Kim MK, Le QT, Ngo DN, Zoh KD, Joo SW. Spectroscopic analysis of microplastic contaminants in an urban wastewater treatment plant from Seoul, South Korea. Chemosphere 2021; 263:127812. [PMID: 32822947 DOI: 10.1016/j.chemosphere.2020.127812] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/18/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
In this study, a systematic multi-spectroscopic analysis of microplastics (MPs) sampled from a metropolitan area of Seoul was undertaken to elevate understanding of the role of wastewater treatment plants (WWTPs) in eliminating suspended contaminants including MPs before releasing the effluent water into the environment. We analyzed pollutants in influent and effluent samples from a WWTP in Seoul, South Korea. Spectroscopic and microscopic methods were used to analyze MPs. Fourier-transform infrared (FT-IR) spectroscopy in the wavenumber region between 4000 and 715 cm-1 was employed to estimate the abundance of MPs in wastewater. Stereomicroscope images and Nile red staining were used to facilely identify MPs in both influents and effluents to compare the results with those of FT-IR data. Hyperspectral imaging could identify MPs in the influent sample with the reflection method at 400-900 nm. Our preliminary results indicate that the most observed MPs after the wastewater were filtered by a 45 μm stainless steel mesh filter were polyethylene (PE) and polypropylene (PP). The total number of the prevalent MPs in influent samples decreased significantly. Nanostructure particles could be found by field-emission scanning electron microscopy (FE-SEM). Our combined multi-spectroscopic study should be helpful to provide a guideline for the rapid spectroscopic analysis of freshwater in the Han River, Seoul, South Korea.
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Affiliation(s)
- Nguyen Binh Nguyen
- Department of Information Communication, Convergence Technology, Soongsil University, Seoul, 06978, South Korea; Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Moon-Kyung Kim
- Institute of Health & Environment, Seoul National University, Seoul, 08826, South Korea
| | - Quang Trung Le
- Department of Information Communication, Convergence Technology, Soongsil University, Seoul, 06978, South Korea; Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Dinh Nghi Ngo
- Department of Information Communication, Convergence Technology, Soongsil University, Seoul, 06978, South Korea; Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Kyung-Duk Zoh
- Institute of Health & Environment, Seoul National University, Seoul, 08826, South Korea
| | - Sang-Woo Joo
- Department of Information Communication, Convergence Technology, Soongsil University, Seoul, 06978, South Korea; Department of Chemistry, Soongsil University, Seoul, 06978, South Korea.
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