High-Performance MoS₂/CuO Nanosheet-on-One-Dimensional Heterojunction Photodetectors

van der Waals heterostructures based on stacked two-dimensional (2D) materials provide novel device structures enabling high-performance electronic and optoelectronic devices. While 2D–2D or 2D–bulk heterostructures have been largely explored for fundamental understanding and novel device applications, 2D–one-dimensional (1D) heterostructures have been rarely studied because of the difficulty in achieving high-quality heterojunctions between 2D and 1D structures. In this study, we introduce nanosheet-on-1D van der Waals heterostructure photodetectors based on a wet-transfer printing of a MoS₂ nanosheet on top of a CuO nanowire (NW). MoS₂/CuO nanosheet-on-1D photodetectors show an excellent photocurrent rectification ratio with an ideality factor of 1.37, which indicates the formation of an atomically sharp interface and a high-quality heterojunction in the MoS₂/CuO heterostructure by wet-transfer-enhanced van der Waals bonding. Furthermore, nanosheet-on-1D heterojunction photodetectors exhibit excellent photodetection capabilities with an ultrahigh photoresponsivity (∼157.6 A/W), a high rectification ratio (∼6000 at ±2 V), a low dark current (∼38 fA at −2 V), and a fast photoresponse time (∼34.6 and 51.9 ms of rise and decay time), which cannot be achievable with 1D-on-nanosheet heterojunction photodetectors. The wet-transfer printing of nanosheet-on-1D heterostructures introduced in this study provides a robust platform for the fundamental study of various combinations of 2D-on-1D heterostructures and their applications in novel heterojunction devices

Creating Strategic Partner Acquisition Project Guideline for Duara Travels

With increasing scientific understanding and felt negative effects across the world, people are more concerned on sustainability issues than ever before. The notion that everyone has their share to do for better tomorrow is starting to be accepted. Corporations realize their role by launching Corporate Social Responsibility programs that aim to increase their positive impact. Some companies take this aim even further by placing the social mission as their sole purpose that is to be accomplished by commercial means. These kinds of companies are called social enterprises. The thesis is commissioned by Duara Travels, which is a for-profit social enterprise operating in travel industry. The company’s aim is to create positive social and economic impact in rural communities of developing economies with an underlying mission to shape the income distribution in tourism industry. The company provides authentic travel experiences to its customers by providing three- and six-night village-experiences in communities aimed to foster cultural exchange and community empowerment. The thesis is conducted as a project that produces a product. The final product is a guideline for strategic partner acquisition in Duara Travels’ destination for Duara Travels. The guideline is based on knowledge that is accumulated in theoretical and operational phases of the thesis. The theoretical part of the thesis consists of two main themes. First theme examines issues of corporations acting as drivers for sustainable development. Concepts such as Corporate Social Responsibility and Social Entrepreneurship are examined. The second theme examines is strategic collaboration between organizations. The issues are examined with an emphasis on tourism industry. In the operational part of the thesis, the author conducts a partner acquisition project for Duara Travels. The project is conducted as a pilot, providing knowledge base for the final product. The author conducts a trip to Bali, Duara Travels’ most popular destination, as a part of the project. In the destination various methods of acquiring partners are put into practice. The project is described in detail, laying out the plan, execution as well as reflection in each part of the project. The discussion gathers the knowledge accumulated in theoretical and operational part. Based on the knowledge acquired, the guideline is built. The guideline is built as a check-list. Its purpose is to act as a roadmap rather than strict manual, leaving space for contextual appliance and future improvement