Selective Area Growth and Characterization of GaN Nanorods Fabricated by Adjusting the Hydrogen Flow Rate and Growth Temperature with Metal Organic Chemical Vapor Deposition

CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen （H2）/nitrogen （N2） and growth temperature of the selective area growth （SAG） method with metal organic chemical vapor deposition （MOCVD）. The SAG template is obtained by nanospherical-lens photolithography. It is found that increasing the flow rate of 1-12 will change the CaN crystal shape from pyramid to vertical rod, while increasing the growth temperature will reduce the diameters of GaN rods to nanometer scale. Finally the CaN nanorods with smooth lateral surface and relatively good quality are obtained under the condition that the H2：N2 ratio is 1：1 and the growth temperature is 1030℃. The good crystal quality and orientation of GaN nanorods are confirmed by high resolution transmission electron microscopy. The cathodoluminescence spectrum suggests that the crystal and optical quality is also improved with increasing the temperature.

Application of Organic Growth Views in Residential Spaces

This paper explored relevant contents, methods and comprehensive efficiency of organic growth view in residential spaces based on personal experience, so as to fi gure out a new approach of residential space design with high economic efficiency, participation and sustainable connotations.

Green corridor of rust belt: Theory and practice of organic growth in three-dimensional space of industrial heritage

This paper aims at the change of land use function in the development of urbanization and the planning transformation between the new and old cities.On the basis of protecting historical and cultural relics and improving environmental problems,new industries,new functions and new vitality are implanted,and a theoretical method of achieving economic,ecological and cultural symbiosis—the theory of organic growth in three-dimensional space is put forward.By analyzing the successful cases at home and abroad,this method summarizes the experience and lessons,and considers the various factors affecting humanity,region and sustainable development.This makes the cultural growth,ecological growth,business growth,to achieve a harmonious unity of the three.The feasibility and advanced nature of the theory to promote social development and optimize urban structure are demonstrated by combining with the reconstruction project of Hangzhou Steel Company(Hanggang)Ruins Park.

THE WISTER EDUCATION CENTER AND GREENHOUSE Uniting Program and Process,History and Mission,Architecture,and Sustainability on the Swarthmore College

Swarthmore College honors its Quaker principles by educating students to be responsible world citizens and through good stewardship of its land and building resources.Today this tradition of citizenship and stewardship is reflected in the College’s purchasing of sustainable power and construction choices.The new 5,200 square foot Wister Education Center and Greenhouse for The Scott Arboretum of Swarthmore College is the most recent and far-reaching green building on campus and serves as a model for integrating sustainable design with the function,mission,and architecture of the institution.

Precise Synthesis of Organic Heterostructures via the Synergy Approach of Polymorphism and Cocrystal Engineering for Optical Applications

Organic heterostructures that can integrate the physiochemical properties of two or more substances have atracted widespread attention in the field of optoelectronics.However,the epitaxial growth process between different organic material molecules is unpredictable,and the precise synthesis of organic heterostructures is stll particularly challenging.Herein,through the synergy approach of polymorphism and cocrystal engineering,a series of organic branched heterostructures have been successfully prepared.Interestingly,by simply adjusting the solvent ratio,different crystalline phases of perylene microplates can be epitaxilly grown on the perylene-OFN cocrystal microwires,which provides a feasible approach for the preparation of organic heterostructures.Meanwhile,these as-prepared organic branched heterostructures can realize multi-channel and multi-color emission,and act as optical logic gates,which promotes the multifunctional integrated optoelectronics.

Experimental study using the dilution incubation method to assess water biostability

Water biostability is of particular concern to water supply as a major limiting factor for heterotrophic bacterial growth in water distribution systems. This study focused on bacterial growth dynamics in the series dilution of water samples with TOC（total organic carbon） values determined beforehand. The results showed that the specific growth rate of Pseudomonas fluorescens P17 varied dramatically and irregularly with TOC value when TOC concentrations were low enough during the initial periods of incubation under given conditions. According to this relationship between bacterial growth rate and TOC, a dilution incubation method was designed for the study of water biostability. With the method under a given condition, a turning-point TOC value was found at a relatively fixed point in the curve between bacterial growth rate and TOC of water sample, and the variation of growth rate had different characteristics below the turning-point TOC value relative to that over this value. A turning-point TOC value similarly existed in all experiments not only with tap water, but also with acetate and mixed solutions. And in the dilution incubation method study, the affections were analyzed by condition factors such as inoculum amount,incubation time and nature of the organic carbon source. In very low organic carbon water environments, the variation characteristics of bacterial growth rate will be useful to further understand the meaning of water biostability.