Work

Cost-effective, hydride-free aqueous synthesis of CdTe quantum dots enabled by using ammonia as the reducing agent

Year: 2025

Type: article

Abstract: The development of a simple, cost-effective, and green method to synthesize CdTe quantum dots (QDs), which are a key nanomaterial in sensing, bioimaging, and immunofluorescence analysis is highly desirable. In this study, we used ammonia in lieu of common hydride reductant to synthesize CdTe QDs by simple refluxing aqueous solutions of cadmium salt, sodium tellurite , and 3-mercaptopropionic acid (MPA). The obtained CdTe QDs were characterized by absorption and photoluminescent spectroscopies, X-ray diffraction (XRD), and transmission electron microscope (TEM). The absorption window and the emission color of QDs were facile controlled over the green–red range by varying the refluxing time. As the QD size increased the crystal structure transformed from CdTe to a CdTeS alloyed form. The results demonstrated herein suggest a cost-effective method for production of CdTe QDs.

Source: Journal of Crystal Growth

DOI: 10.1016/j.jcrysgro.2025.128182

Authors: Van-Thao Ta, Duy-Khanh Nguyen, Xuan-Bach Nguyen, Phuong-Nam Nguyen, Sinh-Hung Nguyen, Xuan-Dung Mai

Institutions: Hanoi Medical University, Hanoi Pedagogical University 2

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,110

Funder: Trường Đại học Sư phạm Hà Nội 2