InAs/GaAs自组织量子电的DLTS谱

将DLTS用于对InAs/GaAs QD结构样品的测量，测定了QD能级发射载流子的热激活能；获得了QD能级俘获电子过程伴随有多声子发射(MPE),QD能级存在一定程度的展宽，以及在某些特定的生长条件下,存在亚稳生长构形的实验证据。结果表明:DLTS在QD体系的研究中有其特有的功能。

The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers

A method was adopted to fix a series of polymers of PE-b-PEO with different PEO/PE segments on the chains of LLDPE. Maleic anhydride (MA) reacting with hydroxyl group of PE-b-PEO (mPE-b-PEO) was used as the intermediate. The structures of intermediates and graft copolymers were approved by H-1 NMR and FTIR. XPS analysis revealed a great amount of oxygen on the surface of grafted copolymers although the end group of PEO was fixed on the LLDPE chains through MA. Thermal properties of the graft copolymers as determined by differential scanning calorimetry (DSC) showed that PE segments in the grafted monomers could promote the heterogeneous nucleation of the polymer, increase T., and crystal growth rate.