Triptycene-terminated thiolate and selenolate monolayers on Au(111)

• Jinxuan Liu,
• Martin Kind,
• Björn Schüpbach,
• Daniel Käfer,
• Stefanie Winkler,
• Wenhua Zhang,
• Andreas Terfort and
• Christof Wöll

Beilstein J. Nanotechnol. 2017, 8, 892–905, doi:10.3762/bjnano.8.91

• of S+ (m/z = 32), Se+ (m/z = 79), triptycyl+ (m/z = 253), triptycylmethyl+ (m/z = 267) and triptycylsulfur+ (m/z = 285). Since the molecular masses of the other sulfur- and selenium-based fragments are close to or even beyond the maximum detectable mass of the used apparatus, we scanned the molecular

• the Trp0Se-SAM (Figure 8b), a strong m/z = 253 signal at 504 K was detected, and no m/z = 166 (triptycylselenium++) signal whatsoever. This finding points to desorption under cleavage of the Se–C bond. However, remaining selenium atoms could not be clearly detected, only a broad, very weak signal at m

• rather broad signal at m/z = 79 with a peak temperature of 575 K is a clear indication that atomic selenium remains on the surface upon temperature-induced desorption of the organic moiety of the Trp1Se SAM at ≈530 K and comes off at higher temperatures. From the TDS data, activation energies of

Facile fabrication of luminescent organic dots by thermolysis of citric acid in urea melt, and their use for cell staining and polyelectrolyte microcapsule labelling

• Nadezhda M. Zholobak,
• Anton L. Popov,
• Alexander B. Shcherbakov,
• Nelly R. Popova,
• Mykhailo M. Guzyk,
• Valeriy P. Antonovich,
• Alla V. Yegorova,
• Yuliya V. Scrypynets,
• Inna I. Leonenko,
• Alexander Ye. Baranchikov and
• Vladimir K. Ivanov

Beilstein J. Nanotechnol. 2016, 7, 1905–1917, doi:10.3762/bjnano.7.182

• crystals (quantum dots, Q-dots) are a good alternative to common fluorescent dyes in a variety of biomedical applications, mainly due to their high photostability and relatively large Stokes shift [1][2][3], but Q-dots typically contain heavy metals (lead, cadmium) and chalcogens (selenium, tellurium

Rigid multipodal platforms for metal surfaces

• Michal Valášek,
• Marcin Lindner and
• Marcel Mayor

Beilstein J. Nanotechnol. 2016, 7, 374–405, doi:10.3762/bjnano.7.34

• significantly reduced operating voltage of the corresponding OLED, resulting in high quantum efficiency, better stability, higher maximum brightness, offering reduced resistance, and permitting higher current densities for a given bias voltage. Aso and co-workers have also synthetized selenium-terminated

• -injection barrier between the Fermi level of the gold electrode and a single discrete energy level of the tripodal molecule at the electrode–molecule interface was smaller in the gold–selenium tripodal interface. This lower barrier for selenol-terminated tripods in the gold–selenium interface leads to a low

Case studies on the formation of chalcogenide self-assembled monolayers on surfaces and dissociative processes

• Yongfeng Tong,
• Tingming Jiang,
• Azzedine Bendounan,
• Makri Nimbegondi Kotresh Harish,
• Angelo Giglia,
• Stefan Kubsky,
• Fausto Sirotti,
• Luca Pasquali,
• Srinivasan Sampath and
• Vladimir A. Esaulov

Beilstein J. Nanotechnol. 2016, 7, 263–277, doi:10.3762/bjnano.7.24

• head group (thiol) molecules [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], but interest in other head group atoms such as C [28][29], N [30] and other chalcogenides has also received increased attention. In particular, selenium head group SAMs have

• ][48][69] and here we provide only essential points about new experiments relevant to this report. Sample preparation Sulfur and selenium adsorption was performed, as in an earlier study [69], by immersion into a 0.1 mM Na2S or Na2Se solution in 0.1 M aqueous NaOH. Na2Se, alkanethiols, thiophenes and

• separation of proteins [97]. As for other metals, undesirable oxidation has led to research into protection by chalcogenide SAMs, and while thiol adsorption has been investigated in some works [98], selenium head group molecule adsorption requires further study. High-resolution XPS spectra were acquired on

Surface-enhanced Raman scattering by colloidal CdSe nanocrystal submonolayers fabricated by the Langmuir–Blodgett technique

• Alexander G. Milekhin,
• Larisa L. Sveshnikova,
• Tatyana A. Duda,
• Ekaterina E. Rodyakina,
• Volodymyr M. Dzhagan,
• Ovidiu D. Gordan,
• Sergey L. Veber,
• Cameliu Himcinschi,
• Alexander V. Latyshev and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2015, 6, 2388–2395, doi:10.3762/bjnano.6.245

• first can be attributed to scattering by surface optical modes, which was previously well-investigated in CdSe NCs [45][49][50]. The latter may originate from SERS by amorphous selenium formed on the NC surface due to partial photodegradation of CdSe NCs under laser illumination [51][52]. This mode has

The Kirkendall effect and nanoscience: hollow nanospheres and nanotubes

• Abdel-Aziz El Mel,
• Ryusuke Nakamura and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 1348–1361, doi:10.3762/bjnano.6.139

• interface within the ZnO which, in this case, plays the role of the fast diffusing material. The strategy demonstrated by Li and Penner in 2005 was adopted by many groups for the synthesis of nanotubes by thermal annealing of metal nanowires under a controlled atmosphere such as sulfur, selenium or oxygen

Nanoporous Ge thin film production combining Ge sputtering and dopant implantation

• Jacques Perrin Toinin,
• Alain Portavoce,
• Khalid Hoummada,
• Michaël Texier,
• Maxime Bertoglio,
• Sandrine Bernardini,
• Marco Abbarchi and
• Lee Chow

Beilstein J. Nanotechnol. 2015, 6, 336–342, doi:10.3762/bjnano.6.32

• semiconductor. In the present work, the impact of high dose selenium and tellurium (3.5 × 1015 atoms/cm2) implantations on the morphology of polycrystalline Ge thin films is presented, as well as the evolution of the film morphology with thermal annealing conditions (temperature and time). Results and

The distribution and degradation of radiolabeled superparamagnetic iron oxide nanoparticles and quantum dots in mice

• Denise Bargheer,
• Artur Giemsa,
• Barbara Freund,
• Markus Heine,
• Christian Waurisch,
• Gordon M. Stachowski,
• Stephen G. Hickey,
• Alexander Eychmüller,
• Jörg Heeren and
• Peter Nielsen

Beilstein J. Nanotechnol. 2015, 6, 111–123, doi:10.3762/bjnano.6.11

• include the absorption of intact micelles into enterocytes [31]. 65Zn-labeling of quantum dots For intrinsic labeling, a variety of radionuclides can be incorporated into quantum dots consisting of cadmium, copper, indium, zinc, selenium, and tellurium. Although cadmium is the most relevant, it has no

Review of nanostructured devices for thermoelectric applications

• Giovanni Pennelli

Beilstein J. Nanotechnol. 2014, 5, 1268–1284, doi:10.3762/bjnano.5.141

• be obtained by ternary alloys based on bismuth/tellurium and antimony (typically p-doped) or selenium (typically n-doped) [22][23][24][25]. Values of the Z factor in excess of 4.5 × 10−3 K−1 (ZT in excess of 1.4) at room temperature have been found. A further increase of the Z factor has been

An insight into the mechanism of charge-transfer of hybrid polymer:ternary/quaternary chalcopyrite colloidal nanocrystals

• Parul Chawla,
• Son Singh and
• Shailesh Narain Sharma

Beilstein J. Nanotechnol. 2014, 5, 1235–1244, doi:10.3762/bjnano.5.137

• . More specifically, where a transparent solution formed by dissolving elemental selenium in tri-n-octylphosphine (TOP) to prepare a TOPSe complex (TOP) was injected into a solution of an equimolar mixture of InCl3 and CuCl2 in TOPO at 250–300 °C under an inert gas atmosphere. A color change from straw

Template based precursor route for the synthesis of CuInSe₂ nanorod arrays for potential solar cell applications

• Mikhail Pashchanka,
• Jonas Bang,
• Niklas S. A. Gora,
• Ildiko Balog,
• Rudolf C. Hoffmann and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2013, 4, 868–874, doi:10.3762/bjnano.4.98

• Cu:In ratio is approximately 0.95, and the measured selenium deficiency is only around 2 at %. Thus, if the formation of secondary phases occurs, only minor concentrations of indium selenide binaries are possible, which nevertheless has to be confirmed by other analysis methods. The purity of the sample

• structural properties can be thus obtained. The most intensive peak at 172 cm−1 results from the Γ1 chalcopyrite phonon mode (selenium anion vibration) [24]. This signal is commonly observed in CuInSe2 thin films and nanoparticles, and its intensity is associated with the crystalline quality [25][26][27]. A

Effect of deposition temperature on the structural and optical properties of chemically prepared nanocrystalline lead selenide thin films

• Anayara Begum,
• Amir Hussain and
• Atowar Rahman

Beilstein J. Nanotechnol. 2012, 3, 438–443, doi:10.3762/bjnano.3.50

• was prepared by mixing 3 g selenium powder with 30 g anhydrous sodium sulfite in 150 ml of distilled water under constant stirring for 8–10 h at 353 K [15]. To prepare thin films of PbSe, 0.5 M Pb(CH3COO)2 solution was prepared. To this solution was added 1 M TSC solution, and then the pH of the

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

• , demonstrating the usefulness of using SAM mediators. The same concept of using SAMs as mediators was demonstrated in a system comprising quantum dots and self-assembled-monolayer-coated titanium dioxide. Here, cadmium–sulfur–selenium (CdSSe) quantum dots were physically attached to hydrothermally synthesized

Precursor concentration and temperature controlled formation of polyvinyl alcohol-capped CdSe-quantum dots

• Chetan P. Shah,
• Madhabchandra Rath,
• Manmohan Kumar and
• Parma N. Bajaj

Beilstein J. Nanotechnol. 2010, 1, 119–127, doi:10.3762/bjnano.1.14

• prepared in aqueous solution at room temperature, by a simple and environmentally friendly chemical method. The size of the CdSe quantum dots was found to be dependent on the concentrations of the precursors of cadmium and selenium ions, as well as on the aging time and the reaction temperature; all of

• greenish-yellow, or orange-colored, transparent sols were obtained on stirring the reaction mixture, depending on the concentrations of cadmium and selenium precursors, and the reaction temperature. At room temperature (27 °C), a greenish-yellow colored sol, containing very low sized CdSe particles, was

• conditions are due to the presence of excess Na2SO3, which was used in the preparation of a Na2SeSO3 stock solution. The measured pH of the reaction mixture was ~8, or higher, depending on the concentration of selenium precursor used. Nucleation of CdSe takes place inside the three dimensional network of the