摘要:
A dendron (2) comprising a focal point (4) and a plurality of fluorinated end groups (9) is disclosed, including one having a thiol, a silane, a carboxylic acid, a phosphonate or another moiety at the focal point suitable for chemisorption to a substrate (3). A self-assembled monolayer comprising a plurality of dendrons bonded to a substrate and a device comprising the self-assembled monolayer are also disclosed.
摘要:
A self-assembled monolayer (SAM) is fabricated using either a semi-fluorinated sulphur containing compound, or a sem-fluorinated silane derivative and compressed carbon dioxide (CO2) as the solvent medium. The temperature and/or pressure of the compressed CO2 may be varied during the fabrication process to improve the molecular packing density of the monolayer.By using compressed CO2 as the solvent medium, monolayers with good molecular packing density can be fabricated relatively quickly without the use of environmentally unfriendly solvents.
摘要翻译:使用半氟化含硫化合物或半氟化硅烷衍生物和压缩二氧化碳(CO 2 CO 2)作为溶剂介质制备自组装单层(SAM)。 压缩的CO 2的温度和/或压力可以在制造过程中变化,以改善单层的分子堆积密度。 通过使用压缩的CO 2 2作为溶剂介质,可以相对快速地制备具有良好分子堆积密度的单层,而不使用环境不友好的溶剂。
摘要:
A method for the patterned deposition of a material comprises the steps of dissolving or suspending said material in a solvent phase comprising compressed carbon dioxide, and depositing the solution or suspension onto a surface, evaporation of the solvent phase leaving a patterned deposit of said material. This method is particularly suitable for the patterned deposition of polymers and small organic molecules in organic light emitting diodes and organic transistors.
摘要:
A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R1 is the same or different and represents a substituent.
摘要:
In a method for testing the thermally induced unbalance of a rotating machine part, in particular the rotor of a turbogenerator, the rotating machine part or the rotor balanced at normal temperature is brought in the demounted state first to nominal rotational speed and held at this, while its temperature is varied and, at the same time, the transient variations in oscillations of the rotating machine part or rotor which are caused are measured. During the test, the rotating machine part or the rotor is surrounded at least partially by a closed heating cell, a cooling medium flows around and/or flows through the rotating machine part or the rotor in the heating cell, and the heating of the rotating machine part or of the rotor takes place essentially due to the flow-dynamic losses arising from the interaction of the rotating machine part or of the rotor with the circulating cooling medium.
摘要:
Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.
摘要:
A machine requiring periodic maintenance, such as a vending machine, is retrofitted to include an alert system for notifying a machine operator that the machine requires servicing. The alert system includes one or more sensors to detect default conditions, a voice recorder for storing one or more voice messages corresponding to default conditions, a transmitter for transmitting the voice messages to the machine operator, and a trigger connected to the one or more sensors and the transmitter for selectively initiating the transmission of appropriate voice messages in accordance with predetermined parameters. The voice messages are transmitted over the public switched telephone network (PSTN) to be heard by the machine operator or stored on the machine operator's voice answering system. The transmitter may be a simple auto dialer connected by wires to a nearby phone jack. However, in a preferred embodiment, the transmitter is constructed in similar manner to the transmitter of a cordless telephone in which the monitored machine includes a short range transmitter operating at 900 MHz or 2200 MHz for transmitting a voice message to a corresponding receiver connected to a nearby phone jack. The voice message is then transmitted over the PSTN to the machine operator. The alert system of the present invention may also include a clock connected to the trigger for causing the voice messages to be transmitted only a predetermined times of the day.
摘要:
A semiconductive conjugated copolymer comprises at least two chemically different monomer units which, when existing in their individual homopolymer forms, have different semiconductor bandgaps. The proportion of said at least two chemically different monomer units in the copolymer is selected to control the semiconductor bandgap of the copolymer so as to control the optical properties of the copolymer. The copolymer is formed in a manner enabling it to be laid down as a film without substantially affecting the luminescent characteristics of the copolymer and is stable at operational temperature.The semiconductor bandgap may be spatially modulated so as to increase the quantum efficiency of the copolymer when excited to luminesce, to select the wavelength of radiation emitted during luminescence or to select the refractive index of the copolymer.
摘要:
Four novel sequences of type B DNA polymerases and variants and analogues thereof useful for applications involving DNA polymerization in high salt conditions.
摘要:
Apparatus for handling documents comprises an inlet 30 for receiving documents, a transfer means for transferring documents from the inlet to a secure or securable location and deposit means, wherein the transfer means is operable, in use, to transfer documents between the inlet and a deposit position adjacent the securable location, said deposit means comprises a plunger 50 and movable members 523b, 523c wherein the movable members 523b, 523c are arranged to move along the plunger 50 as the plunger 50 urges documents into the securable location.