著者

Genki Nakamura Kaori Narimatsu Yasuro Niidome Naotoshi Nakashima

出版者

The Chemical Society of Japan

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.36, no.9, pp.1140-1141, 2007-09-05 (Released:2007-08-11)

参考文献数

26

被引用文献数

43

---

We describe the finding that green tea and catechins individually dissolve single-walled carbon nanotubes (SWNTs). UV–visible–near-IR absorption, photoluminescence, Raman spectroscopy, and atomic force microscopy were used to characterize the solubilized aqueous nanotube solutions.

著者

Tomohiro Shiraki Naotoshi Nakashima

出版者

公益社団法人 日本表面科学会

雑誌

e-Journal of Surface Science and Nanotechnology (ISSN:13480391)

巻号頁・発行日

vol.13, pp.179-184, 2015-04-18 (Released:2015-04-18)

参考文献数

75

被引用文献数

1

---

The determination of electronic states of single-walled carbon nanotubes (SWNTs) has been a central issue in nanoscience of carbon nanotubes. We have established an in situ photoluminescence (PL) spectroelectrochemistry to determine the electronic properties of the SWNTs. This review article focuses on the fundamentals of the in situ PL spectroelectrochmical method to determine electrochemical potentials of isolated SWNTs and microenviromental effects on the electronic states of the SWNTs, electronic states of SWNTs with a single chirality, and empirical prediction for the electronic potentials of the SWNTs. Such electronic state determination is important for detailed understanding about fundamental properties of the SWNTs and their applications, especially in electronic device applications of the nanotubes. [DOI: 10.1380/ejssnt.2015.179]

著者

Takuro Niidme Masanori Fujii Naotoshi Nakashima Yoshiki Katayama Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.150258, (Released:2015-04-17)

被引用文献数

11

---

Gold nanorods were intravenously injected into tumor-bearing mice. The distribution of gold in tumor tissue sections was mapped by imaging mass spectrometry (IMS) using a MALDI mass spectrometer. IMS images of tumor tissue sections indicated that the gold nanorods were not distributed throughout tumor tissues but were localized in vasculature-rich areas.

著者

JongTae Yoo SuHyun Lee Shinsuke Hirata ChaeRin Kim Chang Kee Lee Tomohiro Shiraki Naotoshi Nakashima Jin Kie Shim

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.44, no.4, pp.560-562, 2015-04-05 (Released:2015-04-05)

参考文献数

33

被引用文献数

25

---

We describe the in situ synthesis of the covalent organic framework-5 (COF-5) on the surfaces of carbon nanotubes (CNTs) and graphenes having homogeneous CNT@COF-5 core–shell structures using a sonochemical reaction in one pot. CNT@COF-5 was found to show better CO2 adsorption than the pristine COF-5.

著者

Naoki Imazu Tsuyohiko Fujigaya Naotoshi Nakashima

出版者

(社)日本化学会

雑誌

Bulletin of the Chemical Society of Japan (ISSN:00092673)

巻号頁・発行日

vol.88, no.1, pp.217-221, 2015-01-15 (Released:2015-01-15)

参考文献数

35

被引用文献数

10

---

To fabricate transparent conducting films (TCFs) for electronic devices, both a high conductivity and thermal stability are significant issues due to the need for a high temperature annealing process. In this report, we describe the preparation of a highly transparent (94% transmittance), conductive (surface resistivity: 354 Ω sq−1) and thermally stable double-walled carbon nanotube (DWCNT) film without adding any chemical doping or rinsing. Such film was obtained by a simple dilution and condensation/filtration process (DC/F). The procedure is quite simple, and thus large scalability is easy.

著者

ChaeRin Kim Tsuyohiko Fujigaya Naotoshi Nakashima

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140663, (Released:2014-08-14)

被引用文献数

3

---

Gold (Au) nanoparticles having a Pt-shell layer (Au-Pt) deposited on a conductive support are a promising electrocatalyst for fuel cells for in order to minimize the use of Pt. We describe a facile one-pot method to grow Au-Pt having a 3.8-nm diameter on multi-walled carbon nanotubes (MWNTs) without using any reducing agent, in which polybenzimidazole was used as the binding sites on the MWNTs to load the Au-Pt.

著者

Takao Sada Tsuyohiko Fujigaya Naotoshi Nakashima

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.140489, (Released:2014-06-06)

被引用文献数

1

---

The successful Layer-by-Layer assembly formation using a polyanion and trivalent ion, such as Fe3+, on the surfaces of the nanopores in an anodic aluminum oxide (AAO) membrane with a pore diameter of 35 nm is demonstrated.

著者

Masanori Fujii Naotoshi Nakashima Takuro Niidome Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.43, no.1, pp.131-133, 2014-01-05 (Released:2014-01-05)

参考文献数

23

被引用文献数

13

---

Laser-induced desorption and ionization (LDI) of gold ions (Aun+: n = 1–3) were observed from gold nanorods in a liver tissue section (thickness: 10 µm). Larger amounts of gold nanorods produced stronger mass signals. Organic molecules in the tissue were not detected and did not inhibit the LDI processes of the gold nanorods in the tissue. Because of the selective LDI processes of the gold nanorods, the distribution of gold in the liver was successfully determined by imaging mass spectrometry.

著者

Yuki Hamasaki Naotoshi Nakashima Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.42, no.9, pp.1093-1095, 2013-09-05 (Released:2013-09-05)

参考文献数

19

被引用文献数

4

---

Electrochemical oxidation of silver shells on gold nanorods was examined using in situ spectroscopy and scanning electron microscopy. The oxidation, in a phosphate buffer solution, was suppressed because of the formation of Ag3PO4. In contrast, oxidation in a KCl solution occurred at the corners of the nanorods and proceeded until giving gold nanorods without silver shells. After the 10-s electrolysis, nanoparticles with different shapes were found on the electrode. The inhomogeneous oxidation was due to rapid oxidation of the silver shells and occasional contact of the nanorods with the electrode surfaces.

著者

Kohei Shimoda Tsuyohiko Fujigaya Naotoshi Nakashima Yasuro Niidome

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

pp.130457, (Released:2013-06-21)

被引用文献数

3

---

Poly(N-isopropylacrylamide) (PNIPAM) was coated on gold nanorods (NRs) without forming aggregates. The PNIPAM-coated NRs (PNIPAM-NRs) formed aggregates at higher temperature than the lower critical solution temperature (LCST) of the PNIPAM layers. The aggregation showed reversible spectroscopic responses under repeated temperature cycles. When near infrared (near-IR) light irradiated a PNIPAM-NR solution, the temperature raise up, and formed aggregates that showed broad and weak surface plasmon bands. The spectroscopic responses in near-IR region work as a negative feedback for heating a photoirradiated nanorod solution. The feedback offers spontaneous temperature control of the photoirradiated solution at LCST of PNIPAM.