Language：English  

DOI： 10.1039/d4cc02996h

PubMed

Language：English   Publisher：Royal Society of Chemistry (RSC)  

<jats:p>A new approach enables the automated synthesis of metal and alloy clusters, using metallopeptides as precursors. This method employs Merrifield's solid-phase peptide synthesis, which are then transformed into metal clusters.</jats:p>

DOI： 10.1039/d4sc04400b

PubMed

CiNii Research

Language：English  

DOI： 10.1021/jacs.3c07192

Open Access

Web of Science

PubMed

DOI： 10.1016/j.jpowsour.2023.233419

Web of Science

Publisher：Oxford University Press (OUP)  

DOI： 10.1246/cl.230217

Web of Science

CiNii Research

DOI： 10.35848/1882-0786/ac9d80

Open Access

Web of Science

DOI： 10.35848/1882-0786/ac5c02

Web of Science

Language：Japanese   Publisher：The Japan Photovoltaic Society  

DOI： 10.57295/jpvsproc.1.0_118

Open Access

CiNii Research

Publisher：Wiley  

<jats:title>Abstract</jats:title><jats:p>Subnanocatalysts (SNCs) containing various noble metals (Cu, Ru, Rh, Pd, or Pt) with sizes of approximately 1 nm were synthesized using dendritic poly(phenylazomethine)s as a macromolecular template. These materials exhibit high catalytic performance during toluene oxidation without the use of harmful solvents or explosive oxidants, resulting in the formation of valuable organic products, including benzoic acid as the major product. In particular, Pt<jats:sub>19</jats:sub> SNC with a narrow particle size distribution exhibits extraordinary catalytic activity, with a turnover frequency of 3238 atom<jats:sup>−1</jats:sup> h<jats:sup>−1</jats:sup>, which is 1700 times greater than that obtained by commercial Pt/C catalysts.</jats:p>

DOI： 10.1002/ange.201809530

CiNii Research

Web of Science

Publisher：Trans Tech Publications, Ltd.  

<jats:p>We demonstrate the possibility of forming long-range-ordered self-assembled nanodot arrays with dots size of 5 nm and pitches of 10×7.5 nm<jats:sup>2</jats:sup>using guide line templates and low molecular weight (MW) (4,700–1,200 g/mol) poly (styrene)-poly (dimethylsiloxane) (PS-PDMS) for application in ultrahigh density patterned media. The self-assembled PDMS nanodots are controlled in a long range by varying the heights and gaps of the guide lines. Adopting the 14-nm-high resist guide lines with suitable gaps, the 5-nm-sized and 10×7.5 nm<jats:sup>2</jats:sup>-pitched self-assembled nanodots were ordered in maximum 7 dot arrays with long-range order. The experimental results demonstrate that the method is possible for achieving patterned media with magnetic recording densities of 8.6 Tbit/in.<jats:sup>2</jats:sup>using low MW PS-PDMS and slim guide lines.</jats:p>

DOI： 10.4028/www.scientific.net/kem.643.3

CiNii Research

DOI： 10.1016/j.mee.2014.05.026

Web of Science

Language：English   Publisher：American Chemical Society (ACS)  

DOI： 10.1021/am501230d

Web of Science

PubMed

CiNii Research

DOI： 10.1504/IJNT.2014.060561

Web of Science

Publisher：Trans Tech Publications, Ltd.  

<jats:p>A possibility to fabricate nanodot arrays with a dot size of <10 nm="" and="" a="" dot="" pitch="" of="" 12="" along="" guide="" lines="" has="" been="" studied="" for="" ultrahigh-density="" patterned="" media="" in="" magnetic="" recording="" this="" was="" by="" using="" self-assembling="" block="" copolymers="" polystyrene-poly="" dimethyl="" siloxane="" ps-pdms="" electron="" beam="" eb="" drawing="" with="" hydrogen="" silsesquioxane="" hsq="" negative="" resist="" their="" fusion="" method="" it="" demonstrated="" that="" the="" could="" possibly="" achieve="" 6-nm-sized="" nanodot="" arrays="" 10="" 4="" x="" sup="">2 using self-assembling with PS-PDMS of molecular weight 7000-1500 and EB-drawing for narrow guide lines. These results prove that the fusion method is required for achieving extremely small dot arrays as 5 Tbit/in<jats:sup>2</jats:sup>magnetic storage devices.Keywords: Nanodot, self-assembly, electron-beam drawing, graphoepitaxy, patterned media, magnetic recording.</jats:p>

DOI： 10.4028/www.scientific.net/kem.596.73

CiNii Research

Publisher：Trans Tech Publications, Ltd.  

<jats:p>The self-assembly of block copolymer (BCP) has demonstrated as promising alternative technology to overcome the limitation of conventional lithography owing to its ability in forming nanostructure with size 3-100 nm. In this study, we investigated a technique to transfer self-assembled nanodots of Poly(styrene-b-dimethyl siloxane) (PS-PDMS) BCP to Si. The pattern transfer of PS-PDMS nanodots with the pitch of 33 nm and the diameter of 23 nm using CF4 etching with Carbon Hard Mask (CHM) as Mask is demonstrated. Si nanopillar with height of 51 nm was fabricated. This result improves the potential use of PS-PDMS BCP self-assembly technique for fabrication nano-electronic devices, such as quantum dot solar cell and ultrahigh density of magnetic recording.</jats:p>

DOI： 10.4028/www.scientific.net/msf.737.133

CiNii Research

Publisher：Trans Tech Publications, Ltd.  

<jats:p>In this work, improvement of the observation contrast was investigated by using a carbon film as the hard mask for pattern transfer of block copolymer (BCP) nanodots. The PS-PDMS (Poly (styrene-b-dimethyl siloxane)) block copolymer was adopted here. The observation contrast was greatly improved after transferring block copolymer (BCP) nanodots pattern to the underlying Si substrate through the carbon hard mask compared that before nanodot pattern transfer. Pattern transfer was also demonstrated to be very effective using carbon hard mask.</jats:p>

DOI： 10.4028/www.scientific.net/kem.534.126

CiNii Research

DOI： 10.1143/JJAP.51.06FF10

Web of Science

Publisher：Trans Tech Publications, Ltd.  

<jats:p>In this work, we studied the fabrication of 12-nm-size nanodot pattern by self-assembly technique using high-etching-selectivity poly (styrene)-poly (dimethyl-siloxane) (PS-PDMS) block copolymers. The necessary etching duration for removing the very thin top PDMS layer is unexpectedly longer when the used molecular weight of PS-PDMS is 13.5-4.0 kg/mol (17.5 kg/mol total molecular weight) than that of 30.0-7.5 kg/mol (37.5 kg/mol total molecular weight). From this experimental result, it was clear that PS-PDMS with lower molecular weight forms thicker PDMS layer on the air/polymer interface of PS-PDMS film after microphase separation process. The 22-nm pitch of nanodot pattern by self-assembly holds the promise for the low-cost and high-throughput fabrication of 1.3 Tbit/inch<jats:sup>2</jats:sup>storage device. Nanodot size of 12 nm also further enhances the quantum-dot effect in quantum-dot solar cell.</jats:p>

DOI： 10.4028/www.scientific.net/kem.497.122

CiNii Research

Publisher：Trans Tech Publications, Ltd.  

<jats:p>We have studied functionalization of guide pattern with brush treatment. Especially, the effect of brush treatment on ordering of nanodots formed on the guide pattern was investigated. We used polydimethylsiloxane (PDMS) as brush modification to form self-assembled nanodots on the guide pattern using polystyrene (PS) - PDMS as block copolymer. The brush treatment using toluene solvent made guide patterns of the electron beam (EB) drawn resist behave like PDMS guide patterns and good ordering of the nanodots has been achieved. It was demonstrated that the brush treatment enabled the PDMS nanodots to be regularly located in the desired positions defined by the EB drawn guide patterns.</jats:p>

DOI： 10.4028/www.scientific.net/kem.497.116

CiNii Research

DOI： 10.1016/j.mee.2011.01.005

Web of Science

DOI： 10.1143/JJAP.50.06GG06

Web of Science

DOI： 10.1143/JJAP.50.06GG04

Web of Science

DOI： 10.1063/1.3667225

Web of Science

DOI： 10.1063/1.3667231

Web of Science

Publisher：Trans Tech Publications, Ltd.  

<jats:p>In this study, we investigate self-assembled large-area nanodot fabrication on a silicon substrate using poly(styrene)-poly(dimethyl-siloxane) (PS-PDMS) for the application to quantum dot solar cell. By optimizing the PS-PDMS concentration by 2% and the volume of PS-PDMS solutions by 20 μL/cm<jats:sup>2</jats:sup> dropped to silicon substrate, nanodots with a pitch size of 33 nm and a diameter of 23 nm are achieved with the molecular weight of 30,000-7,500. It is found that the dropped volume of PS-PDMS solution correlated to the thickness of spin-coated PS-PDMS layer has a great effect on the size and the pattern morphology.</jats:p>

DOI： 10.4028/www.scientific.net/kem.459.120

CiNii Research

Publisher：Trans Tech Publications, Ltd.  

<jats:p>In this paper, we report two kinds of guide patterns precisely created by electron beam drawing. These guide patterns are expected to precisely control the arrangement of nanodots self-assembled from block copolymer (BCP) in order to obtain long-range-order nanofabrication. The first guide pattern is comprised only of a post lattice. The second guide pattern adds guide lines to the post lattice. The added guide lines are expected to better control the location and orientation of the BCP nanodots. We succeeded in fabricating these two kinds of guide patterns for 22-nm- and 33-nm-pitch BCP nanodots.</jats:p>

DOI： 10.4028/www.scientific.net/kem.459.124

CiNii Research